blob: 2fb3a62f30d7f248c1f9821e5b40e089da693a41 [file] [log] [blame]
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<!-- Global site tag (gtag.js) - Google Analytics -->
<script async src="https://www.googletagmanager.com/gtag/js?id=UA-61232409-1"></script>
<script>
window.dataLayer = window.dataLayer || [];
function gtag(){dataLayer.push(arguments);}
gtag('js', new Date());
gtag('config', 'UA-61232409-1');
</script>
<!-- Yandex.Metrika counter -->
<script type="text/javascript" >
(function(m,e,t,r,i,k,a){m[i]=m[i]||function(){(m[i].a=m[i].a||[]).push(arguments)};
m[i].l=1*new Date();k=e.createElement(t),a=e.getElementsByTagName(t)[0],k.async=1,k.src=r,a.parentNode.insertBefore(k,a)})
(window, document, "script", "https://mc.yandex.ru/metrika/tag.js", "ym");
ym(72949126, "init", {
clickmap:true,
trackLinks:true,
accurateTrackBounce:true,
webvisor:true
});
</script>
<noscript><div><img src="https://mc.yandex.ru/watch/72949126" style="position:absolute; left:-9999px;" alt="" /></div></noscript>
<!-- /Yandex.Metrika counter -->
<!-- Bugyard widget embed -->
<script type="text/javascript">!function(){if("function"!=typeof window.bugyard){var a=function(){a.c(arguments)};a.q=[],a.c=function(b){a.q.push(b)},window.bugyard=a;var b=document.createElement("script");b.setAttribute("data-bugyard","610961912c35ff001493163a"),b.setAttribute("async","async"),b.setAttribute("defer","defer"),b.setAttribute("src","https://widget.bugyard.io/bugyard.min.js"),document.getElementsByTagName("head")[0].appendChild(b)}}(); window.bugyard("hideButton"); </script>
<link rel="preload" href='/assets/js/code-tabs.js?1' as="script" crossorigin>
<link rel="preload" href='/assets/js/page-nav.js' as="script" crossorigin>
<link rel="preload" href='/assets/js/docs-menu.js?20201005' as="script" crossorigin>
<style>:root{--gg-red:#ec1c24;--gg-orange:#ec1c24;--gg-orange-dark:#bc440b;--gg-orange-filter:invert(47%) sepia(61%) saturate(1950%) hue-rotate(345deg) brightness(100%) contrast(95%);--gg-dark-gray:#333333;--orange-line-thickness:3px;--block-code-background:rgba(241, 241, 241, 20%);--inline-code-background:rgba(241, 241, 241, 90%);--padding-top:25px;--link-color:#ec1c24;--body-background:#fcfcfc}header{min-height:var(--header-height);background:#fff;box-shadow:0 4px 10px 0 #eee,0 0 4px 0 #d5d5d5;z-index:1}header>.container{display:grid;grid-template-columns:auto auto 1fr auto auto auto;grid-template-areas:'left-toggle home nav ver api search lang';grid-template-rows:40px;flex-direction:row;align-items:center;justify-content:flex-start;padding:12px 20px;max-width:1400px;margin:0 auto}header nav>ul{padding:0;margin:0;list-style:none;display:inherit}header .dropdown{display:none;position:fixed;top:calc(var(--header-height) - 12px);width:auto;background:#fff;box-shadow:0 4px 4px 0 rgba(0,0,0,.24),0 0 4px 0 rgba(0,0,0,.12);border-radius:4px;padding-top:10px;padding-bottom:12px;z-index:2}header .dropdown li{display:flex}header .dropdown a{color:grey!important;font-size:16px;padding-top:5px;padding-bottom:4px}header .menu{border:none;background:0 0;width:40px;height:40px;margin-right:12px;grid-area:left-toggle}header .menu img{width:18px;height:12px}header .search-close,header .top-nav-toggle{background:0 0;border:none;padding:0;width:36px;height:36px;display:inline-flex;align-items:center;justify-content:center;color:var(--gg-dark-gray);font-size:26px}header .search-toggle{grid-area:search}header .top-nav-toggle{grid-area:top-toggle}header .home{grid-area:home;margin-right:auto}header .home img{height:36px}header #api-docs{grid-area:api;margin:0;display:flex}header #api-docs .dropdown{padding:.5em 0}header #api-docs a{padding:9px 14px;color:var(--gg-dark-gray)!important;text-decoration:none;white-space:nowrap}header #api-docs .dropdown-item a{font-weight:400;display:block;width:100%;min-width:150px}header #lang-selector li{list-style:none;display:flex;padding:9px 14px}header #lang-selector li a{display:flex;color:#000;align-items:center}header #lang-selector li a span{font-size:10px;margin-left:5px}header #lang-selector li a img{width:25px}header #lang-selector li .dropdown{margin-left:-70px}header #lang-selector li .dropdown .dropdown-item{padding:0 1em;margin-bottom:8px}header #lang-selector li .dropdown .dropdown-item a span{font-size:14px}header .search{margin-left:auto;margin-right:20px;grid-area:search}header .search input[type=search]{color:var(--gg-dark-gray);background:rgba(255,255,255,.8);border:1px solid #ccc;padding:10px 15px;font-family:inherit;max-width:148px;height:37px;font-size:14px;-webkit-appearance:unset;appearance:unset}header #version-selector{list-style:none;grid-area:ver;line-height:28px;border-radius:0;margin-right:10px;border:none;color:var(--gg-dark-gray);padding:5px 16px 5px 10px;white-space:nowrap;font-size:14px;width:auto;text-align:right;box-sizing:border-box;text-align-last:right;-moz-appearance:none;-webkit-appearance:none;appearance:none;direction:rtl}header #version-selector option{direction:ltr}header>nav{grid-area:nav;font-size:18px;display:flex;flex-direction:row;margin:0 20px}header #lang-selector{grid-area:lang}header .search-close{margin-right:10px}@media (max-width:600px){header .search{margin-right:5px}header .search input[type=search]{max-width:110px}}header:not(.narrow-header) .search-close,header:not(.narrow-header) .top-nav-toggle{display:none}@media (max-width:670px){header>.container{grid-template-columns:auto 1fr auto;grid-template-areas:'left-toggle home search' 'ver api lang'}header #lang-selector li{justify-content:flex-end}}pre,pre.rouge{padding:8px 15px;background:var(--block-code-background)!important;border-radius:5px;border:1px solid #e5e5e5;overflow-x:auto;min-height:36px;line-height:18px;color:#545454}code{color:#545454}pre.rouge code{background:0 0!important}:not(pre)>code{background:var(--inline-code-background);padding:.1em .5em;background-clip:padding-box;border-radius:3px;color:#545454;font-size:90%}.listingblock .content{position:relative}.highlight{color:#586e75}.highlight .c1{color:#657b83}.highlight .nt{color:#b58900}.highlight .o{color:#93a1a1}.highlight .k{color:#6c71c4}.highlight .kt{color:#cb4b16}.highlight .s,.highlight .s1{color:#859900}.highlight .nc{color:#b58900}.highlight .na{color:#268bd2}body{font-family:'Open Sans',sans-serif}h1,h2{color:#000;font-weight:400;font-family:'Open Sans'}h1{font-size:36px;line-height:40px}a{text-decoration:none;color:var(--link-color)}section{color:#545454}.admonitionblock .icon .title{display:none}body{--header-height:64px;--promotion-bar-height:35px;--footer-height:104px;--footer-gap:60px;padding:0;margin:0;display:flex;flex-direction:column;min-height:100vh;background-color:var(--body-background);font-family:'Open Sans',sans-serif}body>section{flex:1}header{position:-webkit-sticky;position:sticky;top:0;z-index:2}*{box-sizing:border-box}@media (max-width:670px){body{--header-height:97px}}.left-nav{padding:10px 20px;width:289px;overflow-y:auto;top:calc(var(--header-height) + var(--promotion-bar-height));height:calc(100vh - var(--header-height) - var(--promotion-bar-height));font-family:'Open Sans';padding-top:var(--padding-top);background-color:var(--body-background)}.left-nav li{list-style:none}.left-nav a,.left-nav button{text-decoration:none;color:#757575;font-size:16px;display:inline-flex;width:100%;margin:2px 0;padding:.25em .375em;background:0 0;border:none;font:inherit;text-align:left}.left-nav a.active{color:var(--link-color)}.left-nav .nav-group{margin-left:6px;font-size:14px}.left-nav nav{border-left:2px solid #ddd;margin-bottom:5px}.left-nav nav.collapsed{display:none}.left-nav nav>li>a,.left-nav nav>li>button{padding-left:20px;text-align:left}.left-nav nav>li>a.active{border-left:var(--orange-line-thickness) solid var(--active-color);padding-left:calc(20px - var(--orange-line-thickness))}.left-nav nav.sub_pages{border:none}.left-nav nav.sub_pages a{padding-left:32px}.left-nav .state-indicator{margin-left:auto;margin-top:5px;width:6.2px;height:10px;flex:0 0 auto;filter:invert(49%) sepia(4%) saturate(5%) hue-rotate(23deg) brightness(92%) contrast(90%)}.left-nav button.expanded .state-indicator{transform:rotate(90deg)}.right-nav{width:289px;padding:12px 26px;overflow-y:auto;height:calc(100vh - var(--header-height));top:0;position:-webkit-sticky;position:sticky;display:flex;flex-direction:column;font-family:'Open sans';padding-top:var(--padding-top);background-color:#fff}.right-nav ul{list-style:none;padding:0;margin:0}.right-nav li{padding:0}.right-nav a{--border-width:0px;font-size:14px;color:#757575;padding-left:calc(15px * var(--nesting-level) + 8px - var(--border-width));margin:.3em 0;display:inline-block}.right-nav .sectlevel1{border-left:2px solid #ddd}.right-nav .sectlevel1{--nesting-level:0}.right-nav .sectlevel2{--nesting-level:1}.right-nav .sectlevel3{--nesting-level:2}@media (max-width:1200px){.right-nav{width:230px}}.right-nav footer{font-size:12px;padding:calc(var(--footer-gap) * .3) 0 5px;text-align:left;margin:auto 0 0}section.page-docs{display:grid;grid-template-columns:auto 1fr auto;grid-template-rows:100%;grid-template-areas:'left-nav content right-nav';line-height:20px;max-width:1440px;margin:auto;width:100%}section.page-docs>article{border-left:1px solid #eee;background-color:#fff;padding:0 50px 30px;grid-area:content;overflow:hidden;font-family:sans-serif;font-size:16px;color:#545454;line-height:1.6em}section.page-docs>article h1,section.page-docs>article h2{font-family:'Open Sans'}@media (max-width:800px){section.page-docs>article{padding-left:15px;padding-right:15px}}section.page-docs .edit-link{position:relative;top:10px;right:10px;float:right;padding-top:calc(var(--header-height) + var(--padding-top));margin-top:calc((-1 * var(--header-height)))}section.page-docs h1,section.page-docs h2{margin-bottom:0}section.page-docs h2[id]{margin-top:var(--margin-top);margin-bottom:calc(var(--margin-top) * .5);z-index:-1}section.page-docs .title{font-style:italic}section.page-docs h2[id]{--margin-top:1.2em}.left-nav{bottom:0;position:-webkit-sticky;position:sticky}.left-nav{grid-area:left-nav}.right-nav{grid-area:right-nav}.left-nav__overlay{display:none;background:rgba(0,0,0,.5);z-index:1;position:fixed;top:var(--header-height);bottom:0;left:0;right:0}@media (max-width:990px){body:not(.hide-left-nav) .left-nav__overlay{display:block}nav.left-nav{background:#fafafa;grid-area:left-nav;box-shadow:0 4px 4px 0 rgba(0,0,0,.24),0 0 4px 0 rgba(0,0,0,.12);min-height:calc(100vh - var(--header-height));max-height:calc(100vh - var(--header-height));position:fixed;bottom:0;top:var(--header-height);z-index:2}section.page-docs>article{grid-column-start:left-nav;grid-column-end:content;grid-row:content}}@media (max-width:800px){nav.right-nav{display:none}}:target:before{content:"";display:block;margin-top:calc(var(--header-height) * -1);height:var(--header-height);width:1px}@media (min-width:600px) and (max-width:900px){:target:before{content:"";display:block;width:1px;margin-top:-150px;height:150px}}
#header #promotion-bar { background-color: #333333; padding: 8px; }
#header #promotion-bar p { font-size: 14px; line-height: 1.4em; font-weight: 600; padding: 0; margin: 0; color: #f0f0f0; text-align: center;}
#header #promotion-bar p a { color: #FCB903; } </style>
<meta name="ignite-version" content="2.10.0" />
<title>Ignite DataFrame | Ignite Documentation</title>
<link rel="canonical" href="/docs/2.10.0/extensions-and-integrations/ignite-for-spark/ignite-dataframe" />
<META NAME="ROBOTS" CONTENT="NOINDEX" />
<link rel="shortcut icon" href="/favicon.ico">
<meta name='viewport' content='width=device-width, height=device-height, initial-scale=1.0, minimum-scale=1.0'>
<link rel="preload" as="style" href="https://fonts.googleapis.com/css2?family=Open+Sans:wght@300;400;600;700&display=swap" />
<link rel="stylesheet" href="https://fonts.googleapis.com/css2?family=Open+Sans:wght@300;400;600;700&display=swap" media="print" onload="this.media='all'">
<noscript>
<link href="https://fonts.googleapis.com/css2?family=Open+Sans:wght@300;400;600;700&display=swap" rel="stylesheet">
</noscript>
<script>
// AnchorJS - v4.2.0 - 2019-01-01
// https://github.com/bryanbraun/anchorjs
// Copyright (c) 2019 Bryan Braun; Licensed MIT
!function(A,e){"use strict";"function"==typeof define&&define.amd?define([],e):"object"==typeof module&&module.exports?module.exports=e():(A.AnchorJS=e(),A.anchors=new A.AnchorJS)}(this,function(){"use strict";return function(A){function f(A){A.icon=A.hasOwnProperty("icon")?A.icon:"",A.visible=A.hasOwnProperty("visible")?A.visible:"hover",A.placement=A.hasOwnProperty("placement")?A.placement:"right",A.ariaLabel=A.hasOwnProperty("ariaLabel")?A.ariaLabel:"Anchor",A.class=A.hasOwnProperty("class")?A.class:"",A.base=A.hasOwnProperty("base")?A.base:"",A.truncate=A.hasOwnProperty("truncate")?Math.floor(A.truncate):64,A.titleText=A.hasOwnProperty("titleText")?A.titleText:""}function p(A){var e;if("string"==typeof A||A instanceof String)e=[].slice.call(document.querySelectorAll(A));else{if(!(Array.isArray(A)||A instanceof NodeList))throw new Error("The selector provided to AnchorJS was invalid.");e=[].slice.call(A)}return e}this.options=A||{},this.elements=[],f(this.options),this.isTouchDevice=function(){return!!("ontouchstart"in window||window.DocumentTouch&&document instanceof DocumentTouch)},this.add=function(A){var e,t,i,n,o,s,a,r,c,h,l,u,d=[];if(f(this.options),"touch"===(l=this.options.visible)&&(l=this.isTouchDevice()?"always":"hover"),A||(A="h2, h3, h4, h5, h6"),0===(e=p(A)).length)return this;for(function(){if(null===document.head.querySelector("style.anchorjs")){var A,e=document.createElement("style");e.className="anchorjs",e.appendChild(document.createTextNode("")),void 0===(A=document.head.querySelector('[rel="stylesheet"], style'))?document.head.appendChild(e):document.head.insertBefore(e,A),e.sheet.insertRule(" .anchorjs-link { opacity: 0; text-decoration: none; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }",e.sheet.cssRules.length),e.sheet.insertRule(" *:hover > .anchorjs-link, .anchorjs-link:focus { opacity: 1; }",e.sheet.cssRules.length),e.sheet.insertRule(" [data-anchorjs-icon]::after { content: attr(data-anchorjs-icon); }",e.sheet.cssRules.length),e.sheet.insertRule(' @font-face { font-family: "anchorjs-icons"; src: url(data:n/a;base64,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) format("truetype"); }',e.sheet.cssRules.length)}}(),t=document.querySelectorAll("[id]"),i=[].map.call(t,function(A){return A.id}),o=0;o<e.length;o++)if(this.hasAnchorJSLink(e[o]))d.push(o);else{if(e[o].hasAttribute("id"))n=e[o].getAttribute("id");else if(e[o].hasAttribute("data-anchor-id"))n=e[o].getAttribute("data-anchor-id");else{for(c=r=this.urlify(e[o].textContent),a=0;void 0!==s&&(c=r+"-"+a),a+=1,-1!==(s=i.indexOf(c)););s=void 0,i.push(c),e[o].setAttribute("id",c),n=c}n.replace(/-/g," "),(h=document.createElement("a")).className="anchorjs-link "+this.options.class,h.setAttribute("aria-label",this.options.ariaLabel),h.setAttribute("data-anchorjs-icon",this.options.icon),this.options.titleText&&(h.title=this.options.titleText),u=document.querySelector("base")?window.location.pathname+window.location.search:"",u=this.options.base||u,h.href=u+"#"+n,"always"===l&&(h.style.opacity="1"),""===this.options.icon&&(h.style.font="1em/1 anchorjs-icons","left"===this.options.placement&&(h.style.lineHeight="inherit")),"left"===this.options.placement?(h.style.position="absolute",h.style.marginLeft="-1em",h.style.paddingRight="0.5em",e[o].insertBefore(h,e[o].firstChild)):(h.style.paddingLeft="0.375em",e[o].appendChild(h))}for(o=0;o<d.length;o++)e.splice(d[o]-o,1);return this.elements=this.elements.concat(e),this},this.remove=function(A){for(var e,t,i=p(A),n=0;n<i.length;n++)(t=i[n].querySelector(".anchorjs-link"))&&(-1!==(e=this.elements.indexOf(i[n]))&&this.elements.splice(e,1),i[n].removeChild(t));return this},this.removeAll=function(){this.remove(this.elements)},this.urlify=function(A){return this.options.truncate||f(this.options),A.trim().replace(/\'/gi,"").replace(/[& +$,:;=?@"#{}|^~[`%!'<>\]\.\/\(\)\*\\\n\t\b\v]/g,"-").replace(/-{2,}/g,"-").substring(0,this.options.truncate).replace(/^-+|-+$/gm,"").toLowerCase()},this.hasAnchorJSLink=function(A){var e=A.firstChild&&-1<(" "+A.firstChild.className+" ").indexOf(" anchorjs-link "),t=A.lastChild&&-1<(" "+A.lastChild.className+" ").indexOf(" anchorjs-link ");return e||t||!1}}});
</script>
</head>
<body>
<header>
<!--#include virtual="/includes/promotion_banner.html" -->
<div class="container">
<button type='button' class='menu' title='Docs menu'>
<img src="/assets/images/menu-icon.svg" width="18" height="12" alt="menu icon" />
</button>
<div class='home'>
<a href="/" class='home' title='Apache Ignite home'>
<img src="/assets/images/apache_ignite_logo.svg" alt="Apache Ignite logo" width="103" height="36" >
</a>
</div>
<select id="version-selector">
<option value="2.10.0">2.10.0</option>
</select>
<nav id="api-docs"><ul>
<li><a href="#">APIs</a>
<nav class='dropdown'>
<ul>
<li class="dropdown-item"><a href="/releases/latest/javadoc/index.html">Java</a></li>
<li class="dropdown-item"><a href="/releases/latest/dotnetdoc/api/">C#/.NET</a></li>
<li class="dropdown-item"><a href="/releases/latest/cppdoc/index.html">C++</a></li>
<li class="dropdown-item"><a href="/releases/latest/scaladoc/scalar/index.html#org.apache.ignite.scalar.scalar$">Scala</a></li>
</ul>
</nav>
</li>
<li><a href="#">Examples</a>
<nav class="dropdown">
<ul>
<li class="dropdown-item"><a href="https://github.com/apache/ignite/tree/master/examples" target="_blank" rel="noopener" title="Apache Ignite Java examples">Java</a></li>
<li class="dropdown-item"><a href="https://github.com/apache/ignite/tree/master/modules/platforms/dotnet/examples" target="_blank" rel="noopener" title="Apache Ignite C#/.NET examples">C#/.NET</a></li>
<li class="dropdown-item"><a href="https://github.com/apache/ignite/tree/master/modules/platforms/cpp/examples" target="_blank" rel="noopener" title="Apache Ignite C++ examples">C++</a></li>
<li class="dropdown-item"><a href="https://github.com/apache/ignite/tree/master/modules/platforms/python/examples" target="_blank" rel="noopener" title="Apache Ignite Python examples">Python</a></li>
<li class="dropdown-item"><a href="https://github.com/apache/ignite/tree/master/modules/platforms/nodejs/examples" target="_blank" rel="noopener" title="Apache Ignite NodeJS examples">NodeJS</a></li>
<li class="dropdown-item"><a href="https://github.com/apache/ignite/tree/master/modules/platforms/php/examples" target="_blank" rel="noopener" title="Apache Ignite PHP examples">PHP</a></li>
</ul>
</nav>
</li></ul>
</nav>
<form class='search'>
<button class="search-close" type='button'><img src='/assets/images/cancel.svg' alt="close" width="10" height="10" /></button>
<input type="search" placeholder="Search…" id="search-input">
</form>
<nav id="lang-selector"><ul>
<li><a href="#"><img src="/assets/images/icon_lang_en_75x75.jpg" alt="English language icon" width="25" height="25" /><span></span></a>
<nav class="dropdown">
<li class="dropdown-item"><a href="/docs/latest/" ><img src="/assets/images/icon_lang_en_75x75.jpg" alt="English language icon" width="25" height="25" /><span>English</span></a></li>
<li class="dropdown-item"><a href="https://www.ignite-service.cn/doc/java/" target="_blank" rel="noopener"><img src="/assets/images/icon_lang_cn_75x75.jpg" width="25" height="25" alt="Chinese language icon" /><span>Chinese</span></a></li>
</nav>
</li></ul>
</nav>
<button type='button' class='top-nav-toggle'></button>
</div>
</header>
<link rel="stylesheet" href="/assets/css/docs.css">
<section class='page-docs'>
<nav class='left-nav' data-swiftype-index='false'>
<li>
<a href="/docs/2.10.0/index" class='' >Documentation Overview</a>
</li>
<li>
<button type='button' class='group-toggle collapsed '>Quick Start Guides<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class='nav-group collapsed'>
<li>
<a href="/docs/2.10.0/quick-start/java"
class=''
>Java</a>
</li>
<li>
<a href="/docs/2.10.0/quick-start/dotnet"
class=''
>.NET/C#</a>
</li>
<li>
<a href="/docs/2.10.0/quick-start/cpp"
class=''
>C++</a>
</li>
<li>
<a href="/docs/2.10.0/quick-start/python"
class=''
>Python</a>
</li>
<li>
<a href="/docs/2.10.0/quick-start/nodejs"
class=''
>Node.JS</a>
</li>
<li>
<a href="/docs/2.10.0/quick-start/sql"
class=''
>SQL</a>
</li>
<li>
<a href="/docs/2.10.0/quick-start/php"
class=''
>PHP</a>
</li>
<li>
<a href="/docs/2.10.0/quick-start/restapi"
class=''
>REST API</a>
</li>
</nav>
</li>
<li>
<button type='button' class='group-toggle collapsed '>Installation<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class='nav-group collapsed'>
<li>
<a href="/docs/2.10.0/installation/installing-using-zip"
class=''
>Installing Using ZIP Archive</a>
</li>
<li>
<a href="/docs/2.10.0/installation/installing-using-docker"
class=''
>Installing Using Docker</a>
</li>
<li>
<a href="/docs/2.10.0/installation/deb-rpm"
class=''
>Installing DEB or RPM package</a>
</li>
<li>
<button
type='button'
class='collapsed '>Kubernetes<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class="sub_pages collapsed">
<li><a href="/docs/2.10.0/installation/kubernetes/amazon-eks-deployment" class=''>Amazon EKS</a></li>
<li><a href="/docs/2.10.0/installation/kubernetes/azure-deployment" class=''>Azure Kubernetes Service</a></li>
<li><a href="/docs/2.10.0/installation/kubernetes/gke-deployment" class=''>Google Kubernetes Engine</a></li>
</nav>
</li>
<li>
<a href="/docs/2.10.0/installation/vmware-installation"
class=''
>VMWare</a>
</li>
</nav>
</li>
<li>
<button type='button' class='group-toggle collapsed '>Setting Up<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class='nav-group collapsed'>
<li>
<a href="/docs/2.10.0/understanding-configuration"
class=''
>Understanding Configuration</a>
</li>
<li>
<a href="/docs/2.10.0/setup"
class=''
>Setting Up</a>
</li>
<li>
<a href="/docs/2.10.0/logging"
class=''
>Configuring Logging</a>
</li>
<li>
<a href="/docs/2.10.0/resources-injection"
class=''
>Resources Injection</a>
</li>
</nav>
</li>
<li>
<a href="/docs/2.10.0/starting-nodes" class='' >Starting and Stopping Nodes</a>
</li>
<li>
<button type='button' class='group-toggle collapsed '>Clustering<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class='nav-group collapsed'>
<li>
<a href="/docs/2.10.0/clustering/clustering"
class=''
>Overview</a>
</li>
<li>
<a href="/docs/2.10.0/clustering/tcp-ip-discovery"
class=''
>TCP/IP Discovery</a>
</li>
<li>
<a href="/docs/2.10.0/clustering/zookeeper-discovery"
class=''
>ZooKeeper Discovery</a>
</li>
<li>
<a href="/docs/2.10.0/clustering/discovery-in-the-cloud"
class=''
>Discovery in the Cloud</a>
</li>
<li>
<a href="/docs/2.10.0/clustering/network-configuration"
class=''
>Network Configuration</a>
</li>
<li>
<a href="/docs/2.10.0/clustering/connect-client-nodes"
class=''
>Connecting Client Nodes</a>
</li>
<li>
<a href="/docs/2.10.0/clustering/baseline-topology"
class=''
>Baseline Topology</a>
</li>
<li>
<a href="/docs/2.10.0/clustering/running-client-nodes-behind-nat"
class=''
>Running Client Nodes Behind NAT</a>
</li>
</nav>
</li>
<li>
<button type='button' class='group-toggle collapsed '>Thin Clients<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class='nav-group collapsed'>
<li>
<a href="/docs/2.10.0/thin-clients/getting-started-with-thin-clients"
class=''
>Thin Clients Overview</a>
</li>
<li>
<a href="/docs/2.10.0/thin-clients/java-thin-client"
class=''
>Java Thin Client</a>
</li>
<li>
<a href="/docs/2.10.0/thin-clients/dotnet-thin-client"
class=''
>.NET Thin Client</a>
</li>
<li>
<a href="/docs/2.10.0/thin-clients/cpp-thin-client"
class=''
>C++ Thin Client</a>
</li>
<li>
<a href="/docs/2.10.0/thin-clients/python-thin-client"
class=''
>Python Thin Client</a>
</li>
<li>
<a href="/docs/2.10.0/thin-clients/php-thin-client"
class=''
>PHP Thin Client</a>
</li>
<li>
<a href="/docs/2.10.0/thin-clients/nodejs-thin-client"
class=''
>Node.js Thin Client</a>
</li>
<li>
<button
type='button'
class='collapsed '>Binary Client Protocol<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class="sub_pages collapsed">
<li><a href="/docs/2.10.0/binary-client-protocol/binary-client-protocol" class=''>Binary Client Protocol</a></li>
<li><a href="/docs/2.10.0/binary-client-protocol/data-format" class=''>Data Format</a></li>
<li><a href="/docs/2.10.0/binary-client-protocol/key-value-queries" class=''>Key-Value Queries</a></li>
<li><a href="/docs/2.10.0/binary-client-protocol/sql-and-scan-queries" class=''>SQL and Scan Queries</a></li>
<li><a href="/docs/2.10.0/binary-client-protocol/binary-type-metadata" class=''>Binary Types Metadata</a></li>
<li><a href="/docs/2.10.0/binary-client-protocol/cache-configuration" class=''>Cache Configuration</a></li>
</nav>
</li>
</nav>
</li>
<li>
<button type='button' class='group-toggle collapsed '>Data Modeling<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class='nav-group collapsed'>
<li>
<a href="/docs/2.10.0/data-modeling/data-modeling"
class=''
>Introduction</a>
</li>
<li>
<a href="/docs/2.10.0/data-modeling/data-partitioning"
class=''
>Data Partitioning</a>
</li>
<li>
<a href="/docs/2.10.0/data-modeling/affinity-collocation"
class=''
>Affinity Colocation</a>
</li>
<li>
<a href="/docs/2.10.0/data-modeling/binary-marshaller"
class=''
>Binary Marshaller</a>
</li>
</nav>
</li>
<li>
<button type='button' class='group-toggle collapsed '>Configuring Memory<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class='nav-group collapsed'>
<li>
<a href="/docs/2.10.0/memory-architecture"
class=''
>Memory Architecture</a>
</li>
<li>
<a href="/docs/2.10.0/memory-configuration/data-regions"
class=''
>Configuring Data Regions</a>
</li>
<li>
<a href="/docs/2.10.0/memory-configuration/eviction-policies"
class=''
>Eviction Policies</a>
</li>
<li>
<a href="/docs/2.10.0/memory-configuration/replacement-policies"
class=''
>Replacement Policies</a>
</li>
</nav>
</li>
<li>
<button type='button' class='group-toggle collapsed '>Configuring Persistence<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class='nav-group collapsed'>
<li>
<a href="/docs/2.10.0/persistence/native-persistence"
class=''
>Ignite Persistence</a>
</li>
<li>
<a href="/docs/2.10.0/persistence/external-storage"
class=''
>External Storage</a>
</li>
<li>
<a href="/docs/2.10.0/persistence/swap"
class=''
>Swapping</a>
</li>
<li>
<a href="/docs/2.10.0/persistence/custom-cache-store"
class=''
>Implementing Custom Cache Store</a>
</li>
<li>
<a href="/docs/2.10.0/persistence/snapshot-directory"
class=''
>Configuring Snapshot Directory</a>
</li>
<li>
<a href="/docs/2.10.0/persistence/disk-compression"
class=''
>Disk Compression</a>
</li>
<li>
<a href="/docs/2.10.0/persistence/persistence-tuning"
class=''
>Tuning Persistence</a>
</li>
</nav>
</li>
<li>
<a href="/docs/2.10.0/snapshots/snapshots" class='' >Cluster Snapshots</a>
</li>
<li>
<button type='button' class='group-toggle collapsed '>Configuring Caches<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class='nav-group collapsed'>
<li>
<a href="/docs/2.10.0/configuring-caches/configuration-overview"
class=''
>Cache Configuration</a>
</li>
<li>
<a href="/docs/2.10.0/configuring-caches/configuring-backups"
class=''
>Configuring Partition Backups</a>
</li>
<li>
<a href="/docs/2.10.0/configuring-caches/partition-loss-policy"
class=''
>Partition Loss Policy</a>
</li>
<li>
<a href="/docs/2.10.0/configuring-caches/atomicity-modes"
class=''
>Atomicity Modes</a>
</li>
<li>
<a href="/docs/2.10.0/configuring-caches/expiry-policies"
class=''
>Expiry Policy</a>
</li>
<li>
<a href="/docs/2.10.0/configuring-caches/on-heap-caching"
class=''
>On-Heap Caching</a>
</li>
<li>
<a href="/docs/2.10.0/configuring-caches/cache-groups"
class=''
>Cache Groups</a>
</li>
<li>
<a href="/docs/2.10.0/configuring-caches/near-cache"
class=''
>Near Caches</a>
</li>
</nav>
</li>
<li>
<a href="/docs/2.10.0/data-rebalancing" class='' >Data Rebalancing</a>
</li>
<li>
<a href="/docs/2.10.0/data-streaming" class='' >Data Streaming</a>
</li>
<li>
<button type='button' class='group-toggle collapsed '>Using Key-Value API<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class='nav-group collapsed'>
<li>
<a href="/docs/2.10.0/key-value-api/basic-cache-operations"
class=''
>Basic Cache Operations</a>
</li>
<li>
<a href="/docs/2.10.0/key-value-api/binary-objects"
class=''
>Working with Binary Objects</a>
</li>
<li>
<a href="/docs/2.10.0/key-value-api/using-cache-queries"
class=''
>Using Cache Queries</a>
</li>
<li>
<a href="/docs/2.10.0/read-repair"
class=''
>Read Repair</a>
</li>
</nav>
</li>
<li>
<a href="/docs/2.10.0/key-value-api/transactions" class='' >Performing Transactions</a>
</li>
<li>
<button type='button' class='group-toggle collapsed '>Working with SQL<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class='nav-group collapsed'>
<li>
<a href="/docs/2.10.0/SQL/sql-introduction"
class=''
>Introduction</a>
</li>
<li>
<a href="/docs/2.10.0/SQL/schemas"
class=''
>Understanding Schemas</a>
</li>
<li>
<a href="/docs/2.10.0/SQL/indexes"
class=''
>Defining Indexes</a>
</li>
<li>
<a href="/docs/2.10.0/SQL/sql-api"
class=''
>Using SQL API</a>
</li>
<li>
<a href="/docs/2.10.0/SQL/distributed-joins"
class=''
>Distributed Joins</a>
</li>
<li>
<a href="/docs/2.10.0/SQL/custom-sql-func"
class=''
>Custom SQL Functions</a>
</li>
<li>
<a href="/docs/2.10.0/SQL/JDBC/jdbc-driver"
class=''
>JDBC Driver</a>
</li>
<li>
<a href="/docs/2.10.0/SQL/JDBC/jdbc-client-driver"
class=''
>JDBC Client Driver</a>
</li>
<li>
<button
type='button'
class='collapsed '>ODBC Driver<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class="sub_pages collapsed">
<li><a href="/docs/2.10.0/SQL/ODBC/odbc-driver" class=''>ODBC Driver</a></li>
<li><a href="/docs/2.10.0//SQL/ODBC/connection-string-dsn" class=''>Connection String and DSN</a></li>
<li><a href="/docs/2.10.0/SQL/ODBC/querying-modifying-data" class=''>Querying and Modifying Data</a></li>
<li><a href="/docs/2.10.0/SQL/ODBC/specification" class=''>Specification</a></li>
<li><a href="/docs/2.10.0/SQL/ODBC/data-types" class=''>Data Types</a></li>
<li><a href="/docs/2.10.0/SQL/ODBC/error-codes" class=''>Error Codes</a></li>
</nav>
</li>
<li>
<a href="/docs/2.10.0/transactions/mvcc"
class=''
>Multiversion Concurrency Control</a>
</li>
<li>
<a href="/docs/2.10.0/SQL/sql-statistics"
class=''
>SQL Statistics</a>
</li>
</nav>
</li>
<li>
<button type='button' class='group-toggle collapsed '>SQL Reference<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class='nav-group collapsed'>
<li>
<a href="/docs/2.10.0/sql-reference/sql-conformance"
class=''
>SQL Conformance</a>
</li>
<li>
<a href="/docs/2.10.0/sql-reference/ddl"
class=''
>Data Definition Language (DDL)</a>
</li>
<li>
<a href="/docs/2.10.0/sql-reference/dml"
class=''
>Data Manipulation Language (DML)</a>
</li>
<li>
<a href="/docs/2.10.0/sql-reference/transactions"
class=''
>Transactions</a>
</li>
<li>
<a href="/docs/2.10.0/sql-reference/operational-commands"
class=''
>Operational Commands</a>
</li>
<li>
<a href="/docs/2.10.0/sql-reference/aggregate-functions"
class=''
>Aggregate functions</a>
</li>
<li>
<a href="/docs/2.10.0/sql-reference/numeric-functions"
class=''
>Numeric Functions</a>
</li>
<li>
<a href="/docs/2.10.0/sql-reference/string-functions"
class=''
>String Functions</a>
</li>
<li>
<a href="/docs/2.10.0/sql-reference/date-time-functions"
class=''
>Data and Time Functions</a>
</li>
<li>
<a href="/docs/2.10.0/sql-reference/system-functions"
class=''
>System Functions</a>
</li>
<li>
<a href="/docs/2.10.0/sql-reference/data-types"
class=''
>Data Types</a>
</li>
</nav>
</li>
<li>
<button type='button' class='group-toggle collapsed '>Distributed Computing<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class='nav-group collapsed'>
<li>
<a href="/docs/2.10.0/distributed-computing/distributed-computing"
class=''
>Distributed Computing API</a>
</li>
<li>
<a href="/docs/2.10.0/distributed-computing/cluster-groups"
class=''
>Cluster Groups</a>
</li>
<li>
<a href="/docs/2.10.0/distributed-computing/executor-service"
class=''
>Executor Service</a>
</li>
<li>
<a href="/docs/2.10.0/distributed-computing/map-reduce"
class=''
>MapReduce API</a>
</li>
<li>
<a href="/docs/2.10.0/distributed-computing/load-balancing"
class=''
>Load Balancing</a>
</li>
<li>
<a href="/docs/2.10.0/distributed-computing/fault-tolerance"
class=''
>Fault Tolerance</a>
</li>
<li>
<a href="/docs/2.10.0/distributed-computing/job-scheduling"
class=''
>Job Scheduling</a>
</li>
<li>
<a href="/docs/2.10.0/distributed-computing/collocated-computations"
class=''
>Colocating Computations with Data</a>
</li>
</nav>
</li>
<li>
<button type='button' class='group-toggle collapsed '>Code Deployment<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class='nav-group collapsed'>
<li>
<a href="/docs/2.10.0/code-deployment/deploying-user-code"
class=''
>Deploying User Code</a>
</li>
<li>
<a href="/docs/2.10.0/code-deployment/peer-class-loading"
class=''
>Peer Class Loading</a>
</li>
</nav>
</li>
<li>
<button type='button' class='group-toggle collapsed '>Machine Learning<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class='nav-group collapsed'>
<li>
<a href="/docs/2.10.0/machine-learning/machine-learning"
class=''
>Machine Learning</a>
</li>
<li>
<a href="/docs/2.10.0/machine-learning/partition-based-dataset"
class=''
>Partition Based Dataset</a>
</li>
<li>
<a href="/docs/2.10.0/machine-learning/updating-trained-models"
class=''
>Updating Trained Models</a>
</li>
<li>
<button
type='button'
class='collapsed '>Binary Classification<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class="sub_pages collapsed">
<li><a href="/docs/2.10.0/machine-learning/binary-classification/introduction" class=''>Introduction</a></li>
<li><a href="/docs/2.10.0/machine-learning/binary-classification/linear-svm" class=''>Linear SVM (Support Vector Machine)</a></li>
<li><a href="/docs/2.10.0/machine-learning/binary-classification/decision-trees" class=''>Decision Trees</a></li>
<li><a href="/docs/2.10.0/machine-learning/binary-classification/multilayer-perceptron" class=''>Multilayer Perceptron</a></li>
<li><a href="/docs/2.10.0/machine-learning/binary-classification/logistic-regression" class=''>Logistic Regression</a></li>
<li><a href="/docs/2.10.0/machine-learning/binary-classification/knn-classification" class=''>k-NN Classification</a></li>
<li><a href="/docs/2.10.0/machine-learning/binary-classification/ann" class=''>ANN (Approximate Nearest Neighbor)</a></li>
<li><a href="/docs/2.10.0/machine-learning/binary-classification/naive-bayes" class=''>Naive Bayes</a></li>
</nav>
</li>
<li>
<button
type='button'
class='collapsed '>Regression<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class="sub_pages collapsed">
<li><a href="/docs/2.10.0/machine-learning/regression/introduction" class=''>Introduction</a></li>
<li><a href="/docs/2.10.0/machine-learning/regression/linear-regression" class=''>Linear Regression</a></li>
<li><a href="/docs/2.10.0/machine-learning/regression/decision-trees-regression" class=''>Decision Trees Regression</a></li>
<li><a href="/docs/2.10.0/machine-learning/regression/knn-regression" class=''>k-NN Regression</a></li>
</nav>
</li>
<li>
<button
type='button'
class='collapsed '>Clustering<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class="sub_pages collapsed">
<li><a href="/docs/2.10.0/machine-learning/clustering/introduction" class=''>Introduction</a></li>
<li><a href="/docs/2.10.0/machine-learning/clustering/k-means-clustering" class=''>K-Means Clustering</a></li>
<li><a href="/docs/2.10.0/machine-learning/clustering/gaussian-mixture" class=''>Gaussian mixture (GMM)</a></li>
</nav>
</li>
<li>
<a href="/docs/2.10.0/machine-learning/preprocessing"
class=''
>Preprocessing</a>
</li>
<li>
<button
type='button'
class='collapsed '>Model Selection<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class="sub_pages collapsed">
<li><a href="/docs/2.10.0/machine-learning/model-selection/introduction" class=''>Introduction</a></li>
<li><a href="/docs/2.10.0/machine-learning/model-selection/evaluator" class=''>Evaluator</a></li>
<li><a href="/docs/2.10.0/machine-learning/model-selection/split-the-dataset-on-test-and-train-datasets" class=''>Split the dataset on test and train datasets</a></li>
<li><a href="/docs/2.10.0/machine-learning/model-selection/hyper-parameter-tuning" class=''>Hyper-parameter tuning</a></li>
<li><a href="/docs/2.10.0/machine-learning/model-selection/pipeline-api" class=''>Pipeline API</a></li>
</nav>
</li>
<li>
<a href="/docs/2.10.0/machine-learning/multiclass-classification"
class=''
>Multiclass Classification</a>
</li>
<li>
<button
type='button'
class='collapsed '>Ensemble Methods<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class="sub_pages collapsed">
<li><a href="/docs/2.10.0/machine-learning/ensemble-methods/introduction" class=''></a></li>
<li><a href="/docs/2.10.0/machine-learning/ensemble-methods/stacking" class=''>Stacking</a></li>
<li><a href="/docs/2.10.0/machine-learning/ensemble-methods/baggin" class=''>Bagging</a></li>
<li><a href="/docs/2.10.0/machine-learning/ensemble-methods/random-forest" class=''>Random Forest</a></li>
<li><a href="/docs/2.10.0/machine-learning/ensemble-methods/gradient-boosting" class=''>Gradient Boosting</a></li>
</nav>
</li>
<li>
<a href="/docs/2.10.0/machine-learning/recommendation-systems"
class=''
>Recommendation Systems</a>
</li>
<li>
<button
type='button'
class='collapsed '>Importing Model<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class="sub_pages collapsed">
<li><a href="/docs/2.10.0/machine-learning/importing-model/introduction" class=''>Introduction</a></li>
<li><a href="/docs/2.10.0/machine-learning/importing-model/model-import-from-gxboost" class=''>Import Model from XGBoost</a></li>
<li><a href="/docs/2.10.0/machine-learning/importing-model/model-import-from-apache-spark" class=''>Import Model from Apache Spark</a></li>
</nav>
</li>
</nav>
</li>
<li>
<a href="/docs/2.10.0/key-value-api/continuous-queries" class='' >Using Continuous Queries</a>
</li>
<li>
<a href="/docs/2.10.0/services/services" class='' >Using Ignite Services</a>
</li>
<li>
<a href="/docs/2.10.0/messaging" class='' >Using Ignite Messaging</a>
</li>
<li>
<button type='button' class='group-toggle collapsed '>Distributed Data Structures<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class='nav-group collapsed'>
<li>
<a href="/docs/2.10.0/data-structures/queue-and-set"
class=''
>Queue and Set</a>
</li>
<li>
<a href="/docs/2.10.0/data-structures/atomic-types"
class=''
>Atomic Types</a>
</li>
<li>
<a href="/docs/2.10.0/data-structures/countdownlatch"
class=''
>CountDownLatch</a>
</li>
<li>
<a href="/docs/2.10.0/data-structures/atomic-sequence"
class=''
>Atomic Sequence</a>
</li>
<li>
<a href="/docs/2.10.0/data-structures/semaphore"
class=''
>Semaphore</a>
</li>
<li>
<a href="/docs/2.10.0/data-structures/id-generator"
class=''
>ID Generator</a>
</li>
</nav>
</li>
<li>
<a href="/docs/2.10.0/distributed-locks" class='' >Distributed Locks</a>
</li>
<li>
<a href="/docs/2.10.0/restapi" class='' >REST API</a>
</li>
<li>
<button type='button' class='group-toggle collapsed '>.NET Specific<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class='nav-group collapsed'>
<li>
<a href="/docs/2.10.0/net-specific/net-configuration-options"
class=''
>Configuration Options</a>
</li>
<li>
<a href="/docs/2.10.0/net-specific/net-deployment-options"
class=''
>Deployment Options</a>
</li>
<li>
<a href="/docs/2.10.0/net-specific/net-standalone-nodes"
class=''
>Standalone Nodes</a>
</li>
<li>
<a href="/docs/2.10.0/net-specific/net-async"
class=''
>Asynchronous APIs</a>
</li>
<li>
<a href="/docs/2.10.0/net-specific/net-logging"
class=''
>Logging</a>
</li>
<li>
<a href="/docs/2.10.0/net-specific/net-linq"
class=''
>LINQ</a>
</li>
<li>
<a href="/docs/2.10.0/net-specific/net-java-services-execution"
class=''
>Java Services Execution</a>
</li>
<li>
<a href="/docs/2.10.0/net-specific/net-platform-cache"
class=''
>.NET Platform Cache</a>
</li>
<li>
<a href="/docs/2.10.0/net-specific/net-plugins"
class=''
>Plugins</a>
</li>
<li>
<a href="/docs/2.10.0/net-specific/net-serialization"
class=''
>Serialization</a>
</li>
<li>
<a href="/docs/2.10.0/net-specific/net-cross-platform-support"
class=''
>Cross-Platform Support</a>
</li>
<li>
<a href="/docs/2.10.0/net-specific/net-platform-interoperability"
class=''
>Platform Interoperability</a>
</li>
<li>
<a href="/docs/2.10.0/net-specific/net-remote-assembly-loading"
class=''
>Remote Assembly Loading</a>
</li>
<li>
<a href="/docs/2.10.0/net-specific/net-troubleshooting"
class=''
>Troubleshooting</a>
</li>
<li>
<button
type='button'
class='collapsed '>Integrations<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class="sub_pages collapsed">
<li><a href="/docs/2.10.0/net-specific/asp-net-output-caching" class=''>ASP.NET Output Caching</a></li>
<li><a href="/docs/2.10.0/net-specific/asp-net-session-state-caching" class=''>ASP.NET Session State Caching</a></li>
<li><a href="/docs/2.10.0/net-specific/net-entity-framework-cache" class=''>Entity Framework 2nd Level Cache</a></li>
</nav>
</li>
</nav>
</li>
<li>
<button type='button' class='group-toggle collapsed '>C++ Specific<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class='nav-group collapsed'>
<li>
<a href="/docs/2.10.0/cpp-specific/cpp-serialization"
class=''
>Serialization</a>
</li>
<li>
<a href="/docs/2.10.0/cpp-specific/cpp-platform-interoperability"
class=''
>Platform Interoperability</a>
</li>
<li>
<a href="/docs/2.10.0/cpp-specific/cpp-objects-lifetime"
class=''
>Objects Lifetime</a>
</li>
</nav>
</li>
<li>
<button type='button' class='group-toggle collapsed '>Monitoring<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class='nav-group collapsed'>
<li>
<a href="/docs/2.10.0/monitoring-metrics/intro"
class=''
>Introduction</a>
</li>
<li>
<a href="/docs/2.10.0/monitoring-metrics/cluster-id"
class=''
>Cluster ID and Tag</a>
</li>
<li>
<a href="/docs/2.10.0/monitoring-metrics/cluster-states"
class=''
>Cluster States</a>
</li>
<li>
<button
type='button'
class='collapsed '>Metrics<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class="sub_pages collapsed">
<li><a href="/docs/2.10.0/monitoring-metrics/configuring-metrics" class=''>Configuring Metrics</a></li>
<li><a href="/docs/2.10.0/monitoring-metrics/metrics" class=''>JMX Metrics</a></li>
</nav>
</li>
<li>
<button
type='button'
class='collapsed '>New Metrics System<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class="sub_pages collapsed">
<li><a href="/docs/2.10.0/monitoring-metrics/new-metrics-system" class=''>Introduction</a></li>
<li><a href="/docs/2.10.0/monitoring-metrics/new-metrics" class=''>Metrics</a></li>
</nav>
</li>
<li>
<a href="/docs/2.10.0/monitoring-metrics/system-views"
class=''
>System Views</a>
</li>
<li>
<a href="/docs/2.10.0/monitoring-metrics/performance-statistics"
class=''
>Performance Statistics</a>
</li>
<li>
<a href="/docs/2.10.0/monitoring-metrics/tracing"
class=''
>Tracing</a>
</li>
</nav>
</li>
<li>
<button type='button' class='group-toggle collapsed '>Working with Events<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class='nav-group collapsed'>
<li>
<a href="/docs/2.10.0/events/listening-to-events"
class=''
>Enabling and Listenting to Events</a>
</li>
<li>
<a href="/docs/2.10.0/events/events"
class=''
>Events</a>
</li>
</nav>
</li>
<li>
<button type='button' class='group-toggle collapsed '>Tools<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class='nav-group collapsed'>
<li>
<a href="/docs/2.10.0/tools/control-script"
class=''
>Control Script</a>
</li>
<li>
<a href="/docs/2.10.0/tools/visor-cmd"
class=''
>Visor CMD</a>
</li>
<li>
<a href="/docs/2.10.0/tools/gg-control-center"
class=''
>GridGain Control Center</a>
</li>
<li>
<a href="/docs/2.10.0/tools/sqlline"
class=''
>SQLLine</a>
</li>
<li>
<a href="/docs/2.10.0/tools/tableau"
class=''
>Tableau</a>
</li>
<li>
<a href="/docs/2.10.0/tools/informatica"
class=''
>Informatica</a>
</li>
<li>
<a href="/docs/2.10.0/tools/pentaho"
class=''
>Pentaho</a>
</li>
</nav>
</li>
<li>
<button type='button' class='group-toggle collapsed '>Security<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class='nav-group collapsed'>
<li>
<a href="/docs/2.10.0/security/authentication"
class=''
>Authentication</a>
</li>
<li>
<a href="/docs/2.10.0/security/ssl-tls"
class=''
>SSL/TLS</a>
</li>
<li>
<button
type='button'
class='collapsed '>Transparent Data Encryption<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class="sub_pages collapsed">
<li><a href="/docs/2.10.0/security/tde" class=''>Introduction</a></li>
<li><a href="/docs/2.10.0/security/master-key-rotation" class=''>Master key rotation</a></li>
<li><a href="/docs/2.10.0/security/cache-encryption-key-rotation" class=''>Cache encryption key rotation</a></li>
</nav>
</li>
<li>
<a href="/docs/2.10.0/security/sandbox"
class=''
>Sandbox</a>
</li>
</nav>
</li>
<li>
<button type='button' class='group-toggle expanded '>Extensions and Integrations<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class='nav-group expanded'>
<li>
<button
type='button'
class='collapsed '>Spring<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class="sub_pages collapsed">
<li><a href="/docs/2.10.0/extensions-and-integrations/spring/spring-boot" class=''>Spring Boot</a></li>
<li><a href="/docs/2.10.0/extensions-and-integrations/spring/spring-data" class=''>Spring Data</a></li>
<li><a href="/docs/2.10.0/extensions-and-integrations/spring/spring-caching" class=''>Spring Caching</a></li>
<li><a href="/docs/2.10.0/extensions-and-integrations/spring/spring-tx" class=''>Spring Transactions</a></li>
</nav>
</li>
<li>
<button
type='button'
class='expanded parent '>Ignite for Spark<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class="sub_pages expanded parent">
<li><a href="/docs/2.10.0/extensions-and-integrations/ignite-for-spark/overview" class=''>Overview</a></li>
<li><a href="/docs/2.10.0/extensions-and-integrations/ignite-for-spark/ignitecontext-and-rdd" class=''>IgniteContext and IgniteRDD</a></li>
<li><a href="/docs/2.10.0/extensions-and-integrations/ignite-for-spark/ignite-dataframe" class='active'>Ignite DataFrame</a></li>
<li><a href="/docs/2.10.0/extensions-and-integrations/ignite-for-spark/installation" class=''>Installation</a></li>
<li><a href="/docs/2.10.0/extensions-and-integrations/ignite-for-spark/spark-shell" class=''>Test Ignite with Spark-shell</a></li>
<li><a href="/docs/2.10.0/extensions-and-integrations/ignite-for-spark/troubleshooting" class=''>Troubleshooting</a></li>
</nav>
</li>
<li>
<a href="/docs/2.10.0/extensions-and-integrations/hibernate-l2-cache"
class=''
>Hibernate L2 Cache</a>
</li>
<li>
<a href="/docs/2.10.0/extensions-and-integrations/mybatis-l2-cache"
class=''
>MyBatis L2 Cache</a>
</li>
<li>
<button
type='button'
class='collapsed '>Streaming<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class="sub_pages collapsed">
<li><a href="/docs/2.10.0/extensions-and-integrations/streaming/kafka-streamer" class=''>Kafka Streamer</a></li>
<li><a href="/docs/2.10.0/extensions-and-integrations/streaming/camel-streamer" class=''>Camel Streamer</a></li>
<li><a href="/docs/2.10.0/extensions-and-integrations/streaming/flink-streamer" class=''>Flink Streamer</a></li>
<li><a href="/docs/2.10.0/extensions-and-integrations/streaming/flume-sink" class=''>Flume Sink</a></li>
<li><a href="/docs/2.10.0/extensions-and-integrations/streaming/jms-streamer" class=''>JMS Streamer</a></li>
<li><a href="/docs/2.10.0/extensions-and-integrations/streaming/mqtt-streamer" class=''>MQTT Streamer</a></li>
<li><a href="/docs/2.10.0/extensions-and-integrations/streaming/rocketmq-streamer" class=''>RocketMQ Streamer</a></li>
<li><a href="/docs/2.10.0/extensions-and-integrations/streaming/storm-streamer" class=''>Storm Streamer</a></li>
<li><a href="/docs/2.10.0/extensions-and-integrations/streaming/zeromq-streamer" class=''>ZeroMQ Streamer</a></li>
<li><a href="/docs/2.10.0/extensions-and-integrations/streaming/twitter-streamer" class=''>Twitter Streamer</a></li>
</nav>
</li>
<li>
<button
type='button'
class='collapsed '>Cassandra Integration<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class="sub_pages collapsed">
<li><a href="/docs/2.10.0/extensions-and-integrations/cassandra/overview" class=''>Overview</a></li>
<li><a href="/docs/2.10.0/extensions-and-integrations/cassandra/configuration" class=''>Configuration</a></li>
<li><a href="/docs/2.10.0/extensions-and-integrations/cassandra/usage-examples" class=''>Usage Examples</a></li>
<li><a href="/docs/2.10.0/extensions-and-integrations/cassandra/ddl-generator" class=''>DDL Generator</a></li>
</nav>
</li>
<li>
<a href="/docs/2.10.0/extensions-and-integrations/php-pdo"
class=''
>PHP PDO</a>
</li>
<li>
<a href="/docs/2.10.0/extensions-and-integrations/performance-statistics"
class=''
>Performance Statistics</a>
</li>
</nav>
</li>
<li>
<a href="/docs/2.10.0/plugins" class='' >Plugins</a>
</li>
<li>
<button type='button' class='group-toggle collapsed '>Performance and Troubleshooting<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class='nav-group collapsed'>
<li>
<a href="/docs/2.10.0/perf-and-troubleshooting/general-perf-tips"
class=''
>General Performance Tips</a>
</li>
<li>
<a href="/docs/2.10.0/perf-and-troubleshooting/memory-tuning"
class=''
>Memory and JVM Tuning</a>
</li>
<li>
<a href="/docs/2.10.0/perf-and-troubleshooting/persistence-tuning"
class=''
>Persistence Tuning</a>
</li>
<li>
<a href="/docs/2.10.0/perf-and-troubleshooting/sql-tuning"
class=''
>SQL Tuning</a>
</li>
<li>
<a href="/docs/2.10.0/perf-and-troubleshooting/thread-pools-tuning"
class=''
>Thread Pools Tuning</a>
</li>
<li>
<a href="/docs/2.10.0/perf-and-troubleshooting/troubleshooting"
class=''
>Troubleshooting and Debugging</a>
</li>
<li>
<a href="/docs/2.10.0/perf-and-troubleshooting/handling-exceptions"
class=''
>Handling Exceptions</a>
</li>
<li>
<a href="/docs/2.10.0/perf-and-troubleshooting/yardstick-benchmarking"
class=''
>Benchmarking With Yardstick</a>
</li>
</nav>
</li>
</nav>
<div class="left-nav__overlay"></div>
<article data-swiftype-index='true'>
<a class='edit-link' href="https://github.com/apache/ignite/tree/IGNITE-7595/docs/_docs/extensions-and-integrations/ignite-for-spark/ignite-dataframe.adoc" target="_blank">Edit</a>
<h1>Ignite DataFrame</h1>
<div class="sect1">
<h2 id="overview">Overview</h2>
<div class="sectionbody">
<div class="paragraph">
<p>The Apache Spark DataFrame API introduced the concept of a schema to describe the data, allowing Spark to manage the schema and organize the data into a tabular format. To put it simply, a DataFrame is a distributed collection of data organized into named columns. It is conceptually equivalent to a table in a relational database and allows Spark to leverage the Catalyst query optimizer to produce much more efficient query execution plans in comparison to RDDs, which are just collections of elements partitioned across the nodes of the cluster.</p>
</div>
<div class="paragraph">
<p>Ignite expands DataFrame, simplifying development and improving data access times whenever Ignite is used as memory-centric storage for Spark. Benefits include:</p>
</div>
<div class="ulist">
<ul>
<li>
<p>Ability to share data and state across Spark jobs by writing and reading DataFrames to/from Ignite.</p>
</li>
<li>
<p>Faster SparkSQL queries by optimizing Spark query execution plans with Ignite SQL engine which include​ advanced indexing and avoid data movement across the network from Ignite to Spark.</p>
</li>
</ul>
</div>
</div>
</div>
<div class="sect1">
<h2 id="integration">Integration</h2>
<div class="sectionbody">
<div class="paragraph">
<p><code>IgniteRelationProvider</code> is an implementation of the Spark <code>RelationProvider</code> and <code>CreatableRelationProvider</code> interfaces. The <code>IgniteRelationProvider</code> can talk directly to Ignite tables through the Spark SQL interface. The data are loaded and exchanged via <code>IgniteSQLRelation</code> that executes filtering operations on the Ignite side. For now, grouping, joining or ordering operations are fulfilled on the Spark side. These operations will be optimized and processed on the Ignite side in <a href="https://issues.apache.org/jira/browse/IGNITE-7077" target="_blank" rel="noopener">upcoming releases</a>. <code>IgniteSQLRelation</code> utilizes the partitioned nature of Ignite&#8217;s architecture and provides partitioning information to Spark.</p>
</div>
</div>
</div>
<div class="sect1">
<h2 id="spark-session">Spark Session</h2>
<div class="sectionbody">
<div class="paragraph">
<p>To use the Apache Spark DataFrame API, it is necessary to create an entry point for programming with Spark. This is achieved through the use of a <code>SparkSession</code> object, as shown in the following example:</p>
</div>
<code-tabs><code-tab data-tab='Java'><div class="listingblock">
<div class="content">
<pre class="rouge highlight"><code data-lang="java"><span class="c1">// Creating spark session.</span>
<span class="nc">SparkSession</span> <span class="n">spark</span> <span class="o">=</span> <span class="nc">SparkSession</span><span class="o">.</span><span class="na">builder</span><span class="o">()</span>
<span class="o">.</span><span class="na">appName</span><span class="o">(</span><span class="s">"Example Program"</span><span class="o">)</span>
<span class="o">.</span><span class="na">master</span><span class="o">(</span><span class="s">"local"</span><span class="o">)</span>
<span class="o">.</span><span class="na">config</span><span class="o">(</span><span class="s">"spark.executor.instances"</span><span class="o">,</span> <span class="s">"2"</span><span class="o">)</span>
<span class="o">.</span><span class="na">getOrCreate</span><span class="o">();</span></code></pre>
</div>
</div></code-tab><code-tab data-tab='Scala'><div class="listingblock">
<div class="content">
<pre class="rouge highlight"><code data-lang="scala"><span class="c1">// Creating spark session.</span>
<span class="k">implicit</span> <span class="k">val</span> <span class="nv">spark</span> <span class="k">=</span> <span class="nv">SparkSession</span><span class="o">.</span><span class="py">builder</span><span class="o">()</span>
<span class="o">.</span><span class="py">appName</span><span class="o">(</span><span class="s">"Example Program"</span><span class="o">)</span>
<span class="o">.</span><span class="py">master</span><span class="o">(</span><span class="s">"local"</span><span class="o">)</span>
<span class="o">.</span><span class="py">config</span><span class="o">(</span><span class="s">"spark.executor.instances"</span><span class="o">,</span> <span class="s">"2"</span><span class="o">)</span>
<span class="o">.</span><span class="py">getOrCreate</span><span class="o">()</span></code></pre>
</div>
</div></code-tab></code-tabs>
</div>
</div>
<div class="sect1">
<h2 id="reading-dataframes">Reading DataFrames</h2>
<div class="sectionbody">
<div class="paragraph">
<p>In order to read data from Ignite, you need to specify its format and the path to the Ignite configuration file. For example, assume an Ignite table named ‘person’ is created and deployed in Ignite, as follows:</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="rouge highlight"><code data-lang="sql"><span class="k">CREATE</span> <span class="k">TABLE</span> <span class="n">person</span> <span class="p">(</span>
<span class="n">id</span> <span class="n">LONG</span><span class="p">,</span>
<span class="n">name</span> <span class="nb">VARCHAR</span><span class="p">,</span>
<span class="n">city_id</span> <span class="n">LONG</span><span class="p">,</span>
<span class="k">PRIMARY</span> <span class="k">KEY</span> <span class="p">(</span><span class="n">id</span><span class="p">,</span> <span class="n">city_id</span><span class="p">)</span>
<span class="p">)</span> <span class="k">WITH</span> <span class="nv">"backups=1, affinityKey=city_id”;</span></code></pre>
</div>
</div>
<div class="paragraph">
<p>The following Spark code can find all the rows from the 'person' table where the name is ‘Mary Major’:</p>
</div>
<code-tabs><code-tab data-tab='Java'><div class="listingblock">
<div class="content">
<pre class="rouge highlight"><code data-lang="java"><span class="nc">SparkSession</span> <span class="n">spark</span> <span class="o">=</span> <span class="o">...</span>
<span class="nc">String</span> <span class="n">cfgPath</span> <span class="o">=</span> <span class="s">"path/to/config/file"</span><span class="o">;</span>
<span class="nc">Dataset</span><span class="o">&lt;</span><span class="nc">Row</span><span class="o">&gt;</span> <span class="n">df</span> <span class="o">=</span> <span class="n">spark</span><span class="o">.</span><span class="na">read</span><span class="o">()</span>
<span class="o">.</span><span class="na">format</span><span class="o">(</span><span class="nc">IgniteDataFrameSettings</span><span class="o">.</span><span class="na">FORMAT_IGNITE</span><span class="o">())</span> <span class="c1">//Data source</span>
<span class="o">.</span><span class="na">option</span><span class="o">(</span><span class="nc">IgniteDataFrameSettings</span><span class="o">.</span><span class="na">OPTION_TABLE</span><span class="o">(),</span> <span class="s">"person"</span><span class="o">)</span> <span class="c1">//Table to read.</span>
<span class="o">.</span><span class="na">option</span><span class="o">(</span><span class="nc">IgniteDataFrameSettings</span><span class="o">.</span><span class="na">OPTION_CONFIG_FILE</span><span class="o">(),</span> <span class="no">CONFIG</span><span class="o">)</span> <span class="c1">//Ignite config.</span>
<span class="o">.</span><span class="na">load</span><span class="o">();</span>
<span class="n">df</span><span class="o">.</span><span class="na">createOrReplaceTempView</span><span class="o">(</span><span class="s">"person"</span><span class="o">);</span>
<span class="nc">Dataset</span><span class="o">&lt;</span><span class="nc">Row</span><span class="o">&gt;</span> <span class="n">igniteDF</span> <span class="o">=</span> <span class="n">spark</span><span class="o">.</span><span class="na">sql</span><span class="o">(</span>
<span class="s">"SELECT * FROM person WHERE name = 'Mary Major'"</span><span class="o">);</span></code></pre>
</div>
</div></code-tab><code-tab data-tab='Scala'><div class="listingblock">
<div class="content">
<pre class="rouge highlight"><code data-lang="scala"><span class="k">val</span> <span class="nv">spark</span><span class="k">:</span> <span class="kt">SparkSession</span> <span class="o">=</span> <span class="err"></span>
<span class="k">val</span> <span class="nv">cfgPath</span><span class="k">:</span> <span class="kt">String</span> <span class="o">=</span> <span class="s">"path/to/config/file"</span>
<span class="k">val</span> <span class="nv">df</span> <span class="k">=</span> <span class="nv">spark</span><span class="o">.</span><span class="py">read</span>
<span class="o">.</span><span class="py">format</span><span class="o">(</span><span class="nc">FORMAT_IGNITE</span><span class="o">)</span> <span class="c1">// Data source type.</span>
<span class="o">.</span><span class="py">option</span><span class="o">(</span><span class="nc">OPTION_TABLE</span><span class="o">,</span> <span class="s">"person"</span><span class="o">)</span> <span class="c1">// Table to read.</span>
<span class="o">.</span><span class="py">option</span><span class="o">(</span><span class="nc">OPTION_CONFIG_FILE</span><span class="o">,</span> <span class="n">cfgPath</span><span class="o">)</span> <span class="c1">// Ignite config.</span>
<span class="o">.</span><span class="py">load</span><span class="o">()</span>
<span class="nv">df</span><span class="o">.</span><span class="py">createOrReplaceTempView</span><span class="o">(</span><span class="s">"person"</span><span class="o">)</span>
<span class="k">val</span> <span class="nv">igniteDF</span> <span class="k">=</span> <span class="nv">spark</span><span class="o">.</span><span class="py">sql</span><span class="o">(</span><span class="s">"SELECT * FROM person WHERE name = 'Mary Major'"</span><span class="o">)</span></code></pre>
</div>
</div></code-tab></code-tabs>
</div>
</div>
<div class="sect1">
<h2 id="saving-dataframes">Saving DataFrames</h2>
<div class="sectionbody">
<div class="admonitionblock note">
<table>
<tr>
<td class="icon">
<div class="title">Note</div>
</td>
<td class="content">
<h3 id="implementation-notes" class="discrete">Implementation notes</h3>
<div class="paragraph">
<p>Internally all inserts are done through <code>IgniteDataStreamer</code>. Several optional parameters exist to configure the internal streamer. Please, see a <a href="#ignite-dataframe-options">Ignite DataFrame Options</a> of available options.</p>
</div>
</td>
</tr>
</table>
</div>
<div class="paragraph">
<p>Ignite can serve as a storage for DataFrames created or updated in Spark. The following save modes determine how a DataFrame is processed in Ignite:</p>
</div>
<div class="ulist">
<ul>
<li>
<p><code>Append</code> - the DataFrame will be appended to an existing table. Set <code>OPTION_STREAMER_ALLOW_OVERWRITE=true</code> if you want to update existing entries with the data of the DataFrame.</p>
</li>
<li>
<p><code>Overwrite</code> - the following steps will be executed:</p>
</li>
<li>
<p>If the table already exists in Ignite, it will be dropped.</p>
</li>
<li>
<p>A new table will be created using the schema of the DataFrame and provided options.</p>
</li>
<li>
<p>DataFrame content will be inserted into the new table.</p>
</li>
<li>
<p><code>ErrorIfExists</code> (default) - an exception is thrown if the table already exists in Ignite. If a table does not exist:</p>
</li>
<li>
<p>A new table will be created using the schema of the DataFrame and provided options.</p>
</li>
<li>
<p>DataFrame content will be inserted into the new table.</p>
</li>
<li>
<p><code>Ignore</code> - the operation is ignored if the table already exists in Ignite. If a table does not exist:</p>
</li>
<li>
<p>A new table will be created using the schema of the DataFrame and provided options.</p>
</li>
<li>
<p>DataFrame content will be inserted into the new table.</p>
</li>
</ul>
</div>
<div class="paragraph">
<p>Save mode can be specified using the <code>mode(SaveMode mode)</code> method. For more information, please see the <a href="https://spark.apache.org/docs/2.2.0/api/scala/index.html#org.apache.spark.sql.DataFrameWriter@mode&lpar;saveMode:org.apache.spark.sql.SaveMode&rpar;:org.apache.spark.sql.DataFrameWriter%5BT%5D" target="_blank" rel="noopener">Spark Documentation</a>). Here is a code example that shows this method:</p>
</div>
<code-tabs><code-tab data-tab='Java'><div class="listingblock">
<div class="content">
<pre class="rouge highlight"><code data-lang="java"><span class="nc">SparkSession</span> <span class="n">spark</span> <span class="o">=</span> <span class="o">...</span>
<span class="nc">String</span> <span class="n">cfgPath</span> <span class="o">=</span> <span class="s">"path/to/config/file"</span><span class="o">;</span>
<span class="nc">Dataset</span><span class="o">&lt;</span><span class="nc">Row</span><span class="o">&gt;</span> <span class="n">jsonDataFrame</span> <span class="o">=</span> <span class="n">spark</span><span class="o">.</span><span class="na">read</span><span class="o">().</span><span class="na">json</span><span class="o">(</span><span class="s">"path/to/file.json"</span><span class="o">);</span>
<span class="n">jsonDataFrame</span><span class="o">.</span><span class="na">write</span><span class="o">()</span>
<span class="o">.</span><span class="na">format</span><span class="o">(</span><span class="nc">IgniteDataFrameSettings</span><span class="o">.</span><span class="na">FORMAT_IGNITE</span><span class="o">())</span>
<span class="o">.</span><span class="na">mode</span><span class="o">(</span><span class="nc">SaveMode</span><span class="o">.</span><span class="na">Append</span><span class="o">)</span> <span class="c1">// SaveMode.</span>
<span class="c1">//... other options</span>
<span class="o">.</span><span class="na">save</span><span class="o">();</span></code></pre>
</div>
</div></code-tab><code-tab data-tab='Scala'><div class="listingblock">
<div class="content">
<pre class="rouge highlight"><code data-lang="scala"><span class="k">val</span> <span class="nv">spark</span><span class="k">:</span> <span class="kt">SparkSession</span> <span class="o">=</span> <span class="err"></span>
<span class="k">val</span> <span class="nv">cfgPath</span><span class="k">:</span> <span class="kt">String</span> <span class="o">=</span> <span class="s">"path/to/config/file"</span>
<span class="k">val</span> <span class="nv">jsonDataFrame</span> <span class="k">=</span> <span class="nv">spark</span><span class="o">.</span><span class="py">read</span><span class="o">.</span><span class="py">json</span><span class="o">(</span><span class="s">"path/to/file.json"</span><span class="o">)</span>
<span class="nv">jsonDataFrame</span><span class="o">.</span><span class="py">write</span>
<span class="o">.</span><span class="py">format</span><span class="o">(</span><span class="nc">FORMAT_IGNITE</span><span class="o">)</span>
<span class="o">.</span><span class="py">mode</span><span class="o">(</span><span class="nv">SaveMode</span><span class="o">.</span><span class="py">Append</span><span class="o">)</span> <span class="c1">// SaveMode.</span>
<span class="c1">//... other options</span>
<span class="o">.</span><span class="py">save</span><span class="o">()</span></code></pre>
</div>
</div></code-tab></code-tabs>
<div class="paragraph">
<p>You must define the following Ignite specific options if a new table will be created by a DataFrame&#8217;s save routines:</p>
</div>
<div class="ulist">
<ul>
<li>
<p><code>OPTION_CREATE_TABLE_PRIMARY_KEY_FIELDS</code> - a primary key is required for every Ignite table. This option has to contain a comma-separated list of fields/columns that represent a primary key.</p>
</li>
<li>
<p><code>OPTION_CREATE_TABLE_PARAMETERS</code> - additional parameters to use upon Ignite table creation. The parameters are those that are supported by the <a href="/docs/2.10.0/sql-reference/ddl#create-table">CREATE TABLE</a> command.</p>
</li>
</ul>
</div>
<div class="paragraph">
<p>The following example shows how to write the content of a JSON file into Ignite:</p>
</div>
<code-tabs><code-tab data-tab='Java'><div class="listingblock">
<div class="content">
<pre class="rouge highlight"><code data-lang="java"><span class="nc">SparkSession</span> <span class="n">spark</span> <span class="o">=</span> <span class="o">...</span>
<span class="nc">String</span> <span class="n">cfgPath</span> <span class="o">=</span> <span class="s">"path/to/config/file"</span><span class="o">;</span>
<span class="nc">Dataset</span><span class="o">&lt;</span><span class="nc">Row</span><span class="o">&gt;</span> <span class="n">jsonDataFrame</span> <span class="o">=</span> <span class="n">spark</span><span class="o">.</span><span class="na">read</span><span class="o">().</span><span class="na">json</span><span class="o">(</span><span class="s">"path/to/file.json"</span><span class="o">);</span>
<span class="n">jsonDataFrame</span><span class="o">.</span><span class="na">write</span><span class="o">()</span>
<span class="o">.</span><span class="na">format</span><span class="o">(</span><span class="nc">IgniteDataFrameSettings</span><span class="o">.</span><span class="na">FORMAT_IGNITE</span><span class="o">())</span>
<span class="o">.</span><span class="na">option</span><span class="o">(</span><span class="nc">IgniteDataFrameSettings</span><span class="o">.</span><span class="na">OPTION_CONFIG_FILE</span><span class="o">(),</span> <span class="no">TEST_CONFIG_FILE</span><span class="o">)</span>
<span class="o">.</span><span class="na">option</span><span class="o">(</span><span class="nc">IgniteDataFrameSettings</span><span class="o">.</span><span class="na">OPTION_TABLE</span><span class="o">(),</span> <span class="s">"json_table"</span><span class="o">)</span>
<span class="o">.</span><span class="na">option</span><span class="o">(</span><span class="nc">IgniteDataFrameSettings</span><span class="o">.</span><span class="na">OPTION_CREATE_TABLE_PRIMARY_KEY_FIELDS</span><span class="o">(),</span> <span class="s">"id"</span><span class="o">)</span>
<span class="o">.</span><span class="na">option</span><span class="o">(</span><span class="nc">IgniteDataFrameSettings</span><span class="o">.</span><span class="na">OPTION_CREATE_TABLE_PARAMETERS</span><span class="o">(),</span> <span class="s">"template=replicated"</span><span class="o">)</span>
<span class="o">.</span><span class="na">save</span><span class="o">();</span></code></pre>
</div>
</div></code-tab><code-tab data-tab='Scala'><div class="listingblock">
<div class="content">
<pre class="rouge highlight"><code data-lang="scala"><span class="k">val</span> <span class="nv">spark</span><span class="k">:</span> <span class="kt">SparkSession</span> <span class="o">=</span> <span class="err"></span>
<span class="k">val</span> <span class="nv">cfgPath</span><span class="k">:</span> <span class="kt">String</span> <span class="o">=</span> <span class="s">"path/to/config/file"</span>
<span class="k">val</span> <span class="nv">jsonDataFrame</span> <span class="k">=</span> <span class="nv">spark</span><span class="o">.</span><span class="py">read</span><span class="o">.</span><span class="py">json</span><span class="o">(</span><span class="s">"path/to/file.json"</span><span class="o">)</span>
<span class="nv">jsonDataFrame</span><span class="o">.</span><span class="py">write</span>
<span class="o">.</span><span class="py">format</span><span class="o">(</span><span class="nc">FORMAT_IGNITE</span><span class="o">)</span>
<span class="o">.</span><span class="py">option</span><span class="o">(</span><span class="nc">OPTION_CONFIG_FILE</span><span class="o">,</span> <span class="nc">TEST_CONFIG_FILE</span><span class="o">)</span>
<span class="o">.</span><span class="py">option</span><span class="o">(</span><span class="nc">OPTION_TABLE</span><span class="o">,</span> <span class="s">"json_table"</span><span class="o">)</span>
<span class="o">.</span><span class="py">option</span><span class="o">(</span><span class="nc">OPTION_CREATE_TABLE_PRIMARY_KEY_FIELDS</span><span class="o">,</span> <span class="s">"id"</span><span class="o">)</span>
<span class="o">.</span><span class="py">option</span><span class="o">(</span><span class="nc">OPTION_CREATE_TABLE_PARAMETERS</span><span class="o">,</span> <span class="s">"template=replicated"</span><span class="o">)</span>
<span class="o">.</span><span class="py">save</span><span class="o">()</span></code></pre>
</div>
</div></code-tab></code-tabs>
</div>
</div>
<div class="sect1">
<h2 id="ignitesparksession-and-igniteexternalcatalog">IgniteSparkSession and IgniteExternalCatalog</h2>
<div class="sectionbody">
<div class="paragraph">
<p>Spark introduces the entity called <code>catalog</code> to read and store meta-information about known data sources, such as tables and views. Ignite provides its own implementation of this catalog, called <code>IgniteExternalCatalog</code>.</p>
</div>
<div class="paragraph">
<p><code>IgniteExternalCatalog</code> can read information about all existing SQL tables deployed in the Ignite cluster. <code>IgniteExternalCatalog</code> is also required to build an <code>IgniteSparkSession</code> object.</p>
</div>
<div class="paragraph">
<p><code>IgniteSparkSession</code> is an extension of the regular <code>SparkSession</code> that stores <code>IgniteContext</code> and injects the <code>IgniteExternalCatalog</code> instance into Spark objects.</p>
</div>
<div class="paragraph">
<p><code>IgniteSparkSession.builder()</code> must be used to create <code>IgniteSparkSession</code>. For example, if the following two tables are created in Ignite:</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="rouge highlight"><code data-lang="sql"><span class="k">CREATE</span> <span class="k">TABLE</span> <span class="n">city</span> <span class="p">(</span>
<span class="n">id</span> <span class="n">LONG</span> <span class="k">PRIMARY</span> <span class="k">KEY</span><span class="p">,</span>
<span class="n">name</span> <span class="nb">VARCHAR</span>
<span class="p">)</span> <span class="k">WITH</span> <span class="nv">"template=replicated"</span><span class="p">;</span>
<span class="k">CREATE</span> <span class="k">TABLE</span> <span class="n">person</span> <span class="p">(</span>
<span class="n">id</span> <span class="n">LONG</span><span class="p">,</span>
<span class="n">name</span> <span class="nb">VARCHAR</span><span class="p">,</span>
<span class="n">city_id</span> <span class="n">LONG</span><span class="p">,</span>
<span class="k">PRIMARY</span> <span class="k">KEY</span> <span class="p">(</span><span class="n">id</span><span class="p">,</span> <span class="n">city_id</span><span class="p">)</span>
<span class="p">)</span> <span class="k">WITH</span> <span class="nv">"backups=1, affinityKey=city_id"</span><span class="p">;</span></code></pre>
</div>
</div>
<div class="paragraph">
<p>Then executing the following code provides table meta-information:</p>
</div>
<code-tabs><code-tab data-tab='Java'><div class="listingblock">
<div class="content">
<pre class="rouge highlight"><code data-lang="java"><span class="c1">// Using SparkBuilder provided by Ignite.</span>
<span class="nc">IgniteSparkSession</span> <span class="n">igniteSession</span> <span class="o">=</span> <span class="nc">IgniteSparkSession</span><span class="o">.</span><span class="na">builder</span><span class="o">()</span>
<span class="o">.</span><span class="na">appName</span><span class="o">(</span><span class="s">"Spark Ignite catalog example"</span><span class="o">)</span>
<span class="o">.</span><span class="na">master</span><span class="o">(</span><span class="s">"local"</span><span class="o">)</span>
<span class="o">.</span><span class="na">config</span><span class="o">(</span><span class="s">"spark.executor.instances"</span><span class="o">,</span> <span class="s">"2"</span><span class="o">)</span>
<span class="c1">//Only additional option to refer to Ignite cluster.</span>
<span class="o">.</span><span class="na">igniteConfig</span><span class="o">(</span><span class="s">"/path/to/ignite/config.xml"</span><span class="o">)</span>
<span class="o">.</span><span class="na">getOrCreate</span><span class="o">();</span>
<span class="c1">// This will print out info about all SQL tables existed in Ignite.</span>
<span class="n">igniteSession</span><span class="o">.</span><span class="na">catalog</span><span class="o">().</span><span class="na">listTables</span><span class="o">().</span><span class="na">show</span><span class="o">();</span>
<span class="c1">// This will print out schema of PERSON table.</span>
<span class="n">igniteSession</span><span class="o">.</span><span class="na">catalog</span><span class="o">().</span><span class="na">listColumns</span><span class="o">(</span><span class="s">"person"</span><span class="o">).</span><span class="na">show</span><span class="o">();</span>
<span class="c1">// This will print out schema of CITY table.</span>
<span class="n">igniteSession</span><span class="o">.</span><span class="na">catalog</span><span class="o">().</span><span class="na">listColumns</span><span class="o">(</span><span class="s">"city"</span><span class="o">).</span><span class="na">show</span><span class="o">();</span></code></pre>
</div>
</div></code-tab><code-tab data-tab='Scala'><div class="listingblock">
<div class="content">
<pre class="rouge highlight"><code data-lang="scala"><span class="c1">// Using SparkBuilder provided by Ignite.</span>
<span class="k">val</span> <span class="nv">igniteSession</span> <span class="k">=</span> <span class="nv">IgniteSparkSession</span><span class="o">.</span><span class="py">builder</span><span class="o">()</span>
<span class="o">.</span><span class="py">appName</span><span class="o">(</span><span class="s">"Spark Ignite catalog example"</span><span class="o">)</span>
<span class="o">.</span><span class="py">master</span><span class="o">(</span><span class="s">"local"</span><span class="o">)</span>
<span class="o">.</span><span class="py">config</span><span class="o">(</span><span class="s">"spark.executor.instances"</span><span class="o">,</span> <span class="s">"2"</span><span class="o">)</span>
<span class="c1">//Only additional option to refer to Ignite cluster.</span>
<span class="o">.</span><span class="py">igniteConfig</span><span class="o">(</span><span class="s">"/path/to/ignite/config.xml"</span><span class="o">)</span>
<span class="o">.</span><span class="py">getOrCreate</span><span class="o">()</span>
<span class="c1">// This will print out info about all SQL tables existed in Ignite.</span>
<span class="nv">igniteSession</span><span class="o">.</span><span class="py">catalog</span><span class="o">.</span><span class="py">listTables</span><span class="o">().</span><span class="py">show</span><span class="o">()</span>
<span class="c1">// This will print out schema of PERSON table.</span>
<span class="nv">igniteSession</span><span class="o">.</span><span class="py">catalog</span><span class="o">.</span><span class="py">listColumns</span><span class="o">(</span><span class="s">"person"</span><span class="o">).</span><span class="py">show</span><span class="o">()</span>
<span class="c1">// This will print out schema of CITY table.</span>
<span class="nv">igniteSession</span><span class="o">.</span><span class="py">catalog</span><span class="o">.</span><span class="py">listColumns</span><span class="o">(</span><span class="s">"city"</span><span class="o">).</span><span class="py">show</span><span class="o">()</span></code></pre>
</div>
</div></code-tab></code-tabs>
<div class="paragraph">
<p>And the code output should be similar to the following:</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="rouge highlight"><code data-lang="text">+------+--------+-----------+---------+-----------+
| name|database|description|tableType|isTemporary|
+------+--------+-----------+---------+-----------+
| CITY| | null| EXTERNAL| false|
|PERSON| | null| EXTERNAL| false|
+------+--------+-----------+---------+-----------+
PERSON table description:
+-------+-----------+--------+--------+-----------+--------+
| name|description|dataType|nullable|isPartition|isBucket|
+-------+-----------+--------+--------+-----------+--------+
| NAME| null| string| true| false| false|
| ID| null| bigint| false| true| false|
|CITY_ID| null| bigint| false| true| false|
+-------+-----------+--------+--------+-----------+--------+
CITY table description:
+----+-----------+--------+--------+-----------+--------+
|name|description|dataType|nullable|isPartition|isBucket|
+----+-----------+--------+--------+-----------+--------+
|NAME| null| string| true| false| false|
| ID| null| bigint| false| true| false|
+----+-----------+--------+--------+-----------+--------+</code></pre>
</div>
</div>
</div>
</div>
<div class="sect1">
<h2 id="ignite-dataframe-options">Ignite DataFrame Options</h2>
<div class="sectionbody">
<table class="tableblock frame-all grid-all stripes-even stretch">
<colgroup>
<col style="width: 33.3333%;">
<col style="width: 66.6667%;">
</colgroup>
<thead>
<tr>
<th class="tableblock halign-left valign-top">Name</th>
<th class="tableblock halign-left valign-top">Description</th>
</tr>
</thead>
<tbody>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock"><code>FORMAT_IGNITE</code></p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Name of the Ignite Data Source</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock"><code>OPTION_CONFIG_FILE</code></p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Path to the config file</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock"><code>OPTION_TABLE</code></p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Table name</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock"><code>OPTION_CREATE_TABLE_PARAMETERS</code></p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Additional parameters for a newly created table. The value of this option is used for the <code>WITH</code> part of a <code>CREATE TABLE</code> query.</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock"><code>OPTION_CREATE_TABLE_PRIMARY_KEY_FIELDS</code></p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Comma separated list of primary key fields.</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock"><code>OPTION_STREAMER_ALLOW_OVERWRITE</code></p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">If <code>true</code>, then an existing row will be overwritten with DataFrame content. If <code>false</code>, then the row will be skipped if the primary key already exists in the table.</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock"><code>OPTION_STREAMER_FLUSH_FREQUENCY</code></p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Automatic flush frequency. This is the time after which the streamer will make an attempt to submit all data added so far to remote nodes See <a href="/docs/2.10.0/data-streaming">Data Streaming</a></p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock"><code>OPTION_STREAMER_PER_NODE_BUFFER_SIZE</code></p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Per node buffer size. See also. The size of the per node key-value pairs buffer.</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock"><code>OPTION_STREAMER_PER_NODE_PARALLEL_OPERATIONS</code></p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Per node buffer size. The maximum number of parallel stream operations for a single node.</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock"><code>OPTION_SCHEMA</code></p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">The Ignite SQL schema name in which the specified table exists. When OPTION_SCHEMA is not specified, all schemas will be scanned to find a table with a matching name. This option can be used to differentiate two tables of the same name in different Ignite SQL schemas.</p>
<p class="tableblock">When creating new tables, <code>OPTION_SCHEMA</code> must be specified as <code>PUBLIC</code>, otherwise an exception will be thrown because currently Ignite SQL can issue <code>CREATE TABLE</code> statements within the <code>PUBLIC</code> schema only.</p></td>
</tr>
</tbody>
</table>
</div>
</div>
<div class="sect1">
<h2 id="examples">Examples</h2>
<div class="sectionbody">
<div class="paragraph">
<p>There are several examples available on GitHub that demonstrate how to use Spark DataFrames with Ignite:</p>
</div>
<div class="ulist">
<ul>
<li>
<p><a href="https://github.com/apache/ignite/tree/master/examples/src/main/spark/org/apache/ignite/examples/spark/IgniteDataFrameExample.scala">DataFrame</a></p>
</li>
<li>
<p><a href="https://github.com/apache/ignite/tree/master/examples/src/main/spark/org/apache/ignite/examples/spark/IgniteDataFrameWriteExample.scala">Saving DataFrame</a></p>
</li>
<li>
<p><a href="https://github.com/apache/ignite/tree/master/examples/src/main/spark/org/apache/ignite/examples/spark/IgniteCatalogExample.scala">Catalog</a></p>
</li>
</ul>
</div>
</div>
</div>
<div class="copyright">
© 2021 The Apache Software Foundation.<br/>
Apache, Apache Ignite, the Apache feather and the Apache Ignite logo are either registered trademarks or trademarks of The Apache Software Foundation.
</div>
</article>
<nav class="right-nav" data-swiftype-index='false'>
<div class="toc-wrapper">
<ul class="sectlevel1">
<li><a href="#overview">Overview</a></li>
<li><a href="#integration">Integration</a></li>
<li><a href="#spark-session">Spark Session</a></li>
<li><a href="#reading-dataframes">Reading DataFrames</a></li>
<li><a href="#saving-dataframes">Saving DataFrames</a></li>
<li><a href="#ignitesparksession-and-igniteexternalcatalog">IgniteSparkSession and IgniteExternalCatalog</a></li>
<li><a href="#ignite-dataframe-options">Ignite DataFrame Options</a></li>
<li><a href="#examples">Examples</a></li>
</ul>
</div>
<nav class="promo-nav">
<!--#include virtual="/includes/docs_rightnav_promotion.html" -->
<a href="#" data-trigger-bugyard-feedback="true" id="doc-feedback-btn">Docs Feedback</a>
</nav>
</nav>
</section>
<script type='module' src='/assets/js/code-copy-to-clipboard.js' async crossorigin></script>
<script>
// inits deep anchors -- needs to be done here because of https://www.bryanbraun.com/anchorjs/#dont-run-it-too-late
anchors.add('.page-docs h1, .page-docs h2, .page-docs h3:not(.discrete), .page-docs h4, .page-docs h5');
anchors.options = {
placement: 'right',
visible: 'always'
};
</script>
<script src="https://cdn.jsdelivr.net/npm/docsearch.js@2/dist/cdn/docsearch.min.js"></script>
<script>
docsearch({
// Your apiKey and indexName will be given to you once
// we create your config
apiKey: '3eee686c0ebe39eff3baeb18c56fa5f8',
indexName: 'apache_ignite',
// Replace inputSelector with a CSS selector
// matching your search input
inputSelector: '#search-input',
// algoliaOptions: { 'facetFilters': ["version:$VERSION"] },
// Set debug to true to inspect the dropdown
debug: false,
});
</script>
<script type='module' src='/assets/js/index.js?1639576934' async crossorigin></script>
<script type='module' src='/assets/js/versioning.js?1639576934' async crossorigin></script>
<link rel="stylesheet" href="/assets/css/styles.css?1639576934" media="print" onload="this.media='all'">
<noscript><link media="all" rel="stylesheet" href="/assets/css/styles.css?1639576934"></noscript>
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/docsearch.js@2/dist/cdn/docsearch.min.css" media="print" onload="this.media='all'">
<noscript><link media="all" rel="stylesheet" href="https://cdn.jsdelivr.net/npm/docsearch.js@2/dist/cdn/docsearch.min.css"></noscript>
</body>
</html>