<!doctype html>
<html lang="en-US" data-theme="light">
  <head>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width,initial-scale=1" />
    <meta name="generator" content="VuePress 2.0.0-rc.9" />
    <meta name="theme" content="VuePress Theme Hope 2.0.0-rc.34" />
    <style>
      html {
        background: var(--bg-color, #fff);
      }

      html[data-theme="dark"] {
        background: var(--bg-color, #1d1e1f);
      }

      body {
        background: var(--bg-color);
      }
    </style>
    <script>
      const userMode = localStorage.getItem("vuepress-theme-hope-scheme");
      const systemDarkMode =
        window.matchMedia &&
        window.matchMedia("(prefers-color-scheme: dark)").matches;

      if (userMode === "dark" || (userMode !== "light" && systemDarkMode)) {
        document.documentElement.setAttribute("data-theme", "dark");
      }
    </script>
    <link rel="alternate" hreflang="zh-cn" href="https://iotdb.apache.org/zh/UserGuide/V1.2.x/Reference/DataNode-Config-Manual.html"><meta property="og:url" content="https://iotdb.apache.org/UserGuide/V1.2.x/Reference/DataNode-Config-Manual.html"><meta property="og:site_name" content="IoTDB Website"><meta property="og:title" content="DataNode Configuration Parameters"><meta property="og:description" content="DataNode Configuration Parameters We use the same configuration files for IoTDB DataNode and Standalone version, all under the conf. datanode-env.sh/bat：Environment configuratio..."><meta property="og:type" content="article"><meta property="og:locale" content="en-US"><meta property="og:locale:alternate" content="zh-CN"><meta property="og:updated_time" content="2023-08-15T13:09:03.000Z"><meta property="article:modified_time" content="2023-08-15T13:09:03.000Z"><script type="application/ld+json">{"@context":"https://schema.org","@type":"Article","headline":"DataNode Configuration Parameters","image":[""],"dateModified":"2023-08-15T13:09:03.000Z","author":[]}</script><link rel="icon" href="/favicon.ico"><meta name="Description" content="Apache IoTDB: Time Series Database for IoT"><meta name="Keywords" content="TSDB, time series, time series database, IoTDB, IoT database, IoT data management,时序数据库, 时间序列管理, IoTDB, 物联网数据库, 实时数据库, 物联网数据管理, 物联网数据"><meta name="baidu-site-verification" content="wfKETzB3OT"><meta name="google-site-verification" content="mZWAoRY0yj_HAr-s47zHCGHzx5Ju-RVm5wDbPnwQYFo"><script type="text/javascript">
var _paq = window._paq = window._paq || [];
/* tracker methods like "setCustomDimension" should be called before "trackPageView" */
_paq.push(["setDoNotTrack", true]);
_paq.push(["disableCookies"]);
_paq.push(['trackPageView']);
_paq.push(['enableLinkTracking']);
(function() {
  var u="https://analytics.apache.org/";
  _paq.push(['setTrackerUrl', u+'matomo.php']);
  _paq.push(['setSiteId', '56']);
  var d=document, g=d.createElement('script'), s=d.getElementsByTagName('script')[0];
  g.async=true; g.src=u+'matomo.js'; s.parentNode.insertBefore(g,s);
})();
       </script><title>DataNode Configuration Parameters | IoTDB Website</title><meta name="description" content="DataNode Configuration Parameters We use the same configuration files for IoTDB DataNode and Standalone version, all under the conf. datanode-env.sh/bat：Environment configuratio...">
    <link rel="preload" href="/assets/style-DnEHAOmf.css" as="style"><link rel="stylesheet" href="/assets/style-DnEHAOmf.css">
    <link rel="modulepreload" href="/assets/app-B-0YFdX2.js"><link rel="modulepreload" href="/assets/DataNode-Config-Manual.html-SulNp-Zk.js">
    
  </head>
  <body>
    <div id="app"><!--[--><!--[--><!--[--><span tabindex="-1"></span><a href="#main-content" class="vp-skip-link sr-only">Skip to main content</a><!--]--><!--[--><div class="theme-container has-toc"><!--[--><header id="navbar" class="vp-navbar hide-icon"><div class="vp-navbar-start"><button type="button" class="vp-toggle-sidebar-button" title="Toggle Sidebar"><span class="icon"></span></button><!--[--><!----><!--]--><!--[--><a class="route-link vp-brand" href="/"><img class="vp-nav-logo" src="/logo.png" alt><!----><span class="vp-site-name hide-in-pad">IoTDB Website</span></a><!--]--><!--[--><!----><!--]--></div><div class="vp-navbar-center"><!--[--><!----><!--]--><!--[--><!--]--><!--[--><!----><!--]--></div><div class="vp-navbar-end"><!--[--><!----><!--]--><!--[--><!--[--><div id="docsearch-container" style="display:none;"></div><div><button type="button" class="DocSearch DocSearch-Button" aria-label="Search"><span class="DocSearch-Button-Container"><svg width="20" height="20" class="DocSearch-Search-Icon" viewBox="0 0 20 20"><path d="M14.386 14.386l4.0877 4.0877-4.0877-4.0877c-2.9418 2.9419-7.7115 2.9419-10.6533 0-2.9419-2.9418-2.9419-7.7115 0-10.6533 2.9418-2.9419 7.7115-2.9419 10.6533 0 2.9419 2.9418 2.9419 7.7115 0 10.6533z" stroke="currentColor" fill="none" fill-rule="evenodd" stroke-linecap="round" stroke-linejoin="round"></path></svg><span class="DocSearch-Button-Placeholder">Search</span></span><span class="DocSearch-Button-Keys"><kbd class="DocSearch-Button-Key"><svg width="15" height="15" class="DocSearch-Control-Key-Icon"><path d="M4.505 4.496h2M5.505 5.496v5M8.216 4.496l.055 5.993M10 7.5c.333.333.5.667.5 1v2M12.326 4.5v5.996M8.384 4.496c1.674 0 2.116 0 2.116 1.5s-.442 1.5-2.116 1.5M3.205 9.303c-.09.448-.277 1.21-1.241 1.203C1 10.5.5 9.513.5 8V7c0-1.57.5-2.5 1.464-2.494.964.006 1.134.598 1.24 1.342M12.553 10.5h1.953" stroke-width="1.2" stroke="currentColor" fill="none" stroke-linecap="square"></path></svg></kbd><kbd class="DocSearch-Button-Key">K</kbd></span></button></div><!--]--><nav class="vp-nav-links"><div class="vp-nav-item hide-in-mobile"><div class="dropdown-wrapper"><button type="button" class="dropdown-title" aria-label="Documentation"><span class="title"><!---->Documentation</span><span class="arrow"></span><ul class="nav-dropdown"><li class="dropdown-item"><a class="route-link nav-link" href="/UserGuide/latest/QuickStart/QuickStart.html" aria-label="v1.3.x"><!---->v1.3.x<!----></a></li><li class="dropdown-item"><a class="route-link nav-link" href="/UserGuide/V1.2.x/QuickStart/QuickStart.html" aria-label="v1.2.x"><!---->v1.2.x<!----></a></li><li class="dropdown-item"><a class="route-link nav-link" href="/UserGuide/V1.1.x/QuickStart/QuickStart.html" aria-label="v1.1.x"><!---->v1.1.x<!----></a></li><li class="dropdown-item"><a class="route-link nav-link" href="/UserGuide/V1.0.x/QuickStart/QuickStart.html" aria-label="v1.0.x"><!---->v1.0.x<!----></a></li><li class="dropdown-item"><a class="route-link nav-link" href="/UserGuide/V0.13.x/QuickStart/QuickStart.html" aria-label="v0.13.x"><!---->v0.13.x<!----></a></li></ul></button></div></div><div class="vp-nav-item hide-in-mobile"><a href="https://cwiki.apache.org/confluence/display/IOTDB/System+Design" rel="noopener noreferrer" target="_blank" aria-label="Design" class="nav-link"><!---->Design<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="vp-nav-item hide-in-mobile"><a class="route-link nav-link" href="/Download/" aria-label="Download"><!---->Download<!----></a></div><div class="vp-nav-item hide-in-mobile"><div class="dropdown-wrapper"><button type="button" class="dropdown-title" aria-label="Community"><span class="title"><!---->Community</span><span class="arrow"></span><ul class="nav-dropdown"><li class="dropdown-item"><a class="route-link nav-link" href="/Community/About.html" aria-label="About"><!---->About<!----></a></li><li class="dropdown-item"><a href="https://cwiki.apache.org/confluence/display/iotdb" rel="noopener noreferrer" target="_blank" aria-label="Wiki" class="nav-link"><!---->Wiki<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></li><li class="dropdown-item"><a class="route-link nav-link" href="/Community/Community-Project-Committers.html" aria-label="People"><!---->People<!----></a></li><li class="dropdown-item"><a class="route-link nav-link" href="/Community/Community-Powered-By.html" aria-label="Powered  By"><!---->Powered  By<!----></a></li><li class="dropdown-item"><a class="route-link nav-link" href="/Community/Materials.html" aria-label="Resources"><!---->Resources<!----></a></li><li class="dropdown-item"><a class="route-link nav-link" href="/Community/Feedback.html" aria-label="Feedback"><!---->Feedback<!----></a></li></ul></button></div></div><div class="vp-nav-item hide-in-mobile"><div class="dropdown-wrapper"><button type="button" class="dropdown-title" aria-label="Development"><span class="title"><!---->Development</span><span class="arrow"></span><ul class="nav-dropdown"><li class="dropdown-item"><a class="route-link nav-link" href="/Development/VoteRelease.html" aria-label="How  to  vote"><!---->How  to  vote<!----></a></li><li class="dropdown-item"><a class="route-link nav-link" href="/Development/HowToCommit.html" aria-label="How  to  Commit"><!---->How  to  Commit<!----></a></li><li class="dropdown-item"><a class="route-link nav-link" href="/Development/HowToJoin.html" aria-label="Become  a  Contributor"><!---->Become  a  Contributor<!----></a></li><li class="dropdown-item"><a class="route-link nav-link" href="/Development/Committer.html" aria-label="Become  a  Committer"><!---->Become  a  Committer<!----></a></li><li class="dropdown-item"><a class="route-link nav-link" href="/Development/ContributeGuide.html" aria-label="ContributeGuide"><!---->ContributeGuide<!----></a></li><li class="dropdown-item"><a class="route-link nav-link" href="/Development/HowtoContributeCode.html" aria-label="How  to  Contribute  Code"><!---->How  to  Contribute  Code<!----></a></li><li class="dropdown-item"><a class="route-link nav-link" href="/Development/format-changelist.html" aria-label="Changelist  of  TsFile"><!---->Changelist  of  TsFile<!----></a></li><li class="dropdown-item"><a class="route-link nav-link" href="/Development/rpc-changelist.html" aria-label="Changelist  of  RPC"><!---->Changelist  of  RPC<!----></a></li></ul></button></div></div><div class="vp-nav-item hide-in-mobile"><div class="dropdown-wrapper"><button type="button" class="dropdown-title" aria-label="ASF"><span class="title"><!---->ASF</span><span class="arrow"></span><ul class="nav-dropdown"><li class="dropdown-item"><a href="https://www.apache.org/" rel="noopener noreferrer" target="_blank" aria-label="Foundation" class="nav-link"><!---->Foundation<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></li><li class="dropdown-item"><a href="https://www.apache.org/licenses/" rel="noopener noreferrer" target="_blank" aria-label="License" class="nav-link"><!---->License<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></li><li class="dropdown-item"><a href="https://www.apache.org/security/" rel="noopener noreferrer" target="_blank" aria-label="Security" class="nav-link"><!---->Security<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></li><li class="dropdown-item"><a href="https://www.apache.org/foundation/sponsorship.html" rel="noopener noreferrer" target="_blank" aria-label="Sponsorship" class="nav-link"><!---->Sponsorship<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></li><li class="dropdown-item"><a href="https://www.apache.org/foundation/thanks.html" rel="noopener noreferrer" target="_blank" aria-label="Thanks" class="nav-link"><!---->Thanks<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></li><li class="dropdown-item"><a href="https://www.apache.org/events/current-event" rel="noopener noreferrer" target="_blank" aria-label="Current  Events" class="nav-link"><!---->Current  Events<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></li><li class="dropdown-item"><a href="https://privacy.apache.org/policies/privacy-policy-public.html" rel="noopener noreferrer" target="_blank" aria-label="Privacy" class="nav-link"><!---->Privacy<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></li></ul></button></div></div></nav><div class="vp-nav-item"><div class="dropdown-wrapper"><button type="button" class="dropdown-title" aria-label="Select language"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon i18n-icon" viewBox="0 0 1024 1024" fill="currentColor" aria-label="i18n icon" style="width:1rem;height:1rem;vertical-align:middle;"><path d="M379.392 460.8 494.08 575.488l-42.496 102.4L307.2 532.48 138.24 701.44l-71.68-72.704L234.496 460.8l-45.056-45.056c-27.136-27.136-51.2-66.56-66.56-108.544h112.64c7.68 14.336 16.896 27.136 26.112 35.84l45.568 46.08 45.056-45.056C382.976 312.32 409.6 247.808 409.6 204.8H0V102.4h256V0h102.4v102.4h256v102.4H512c0 70.144-37.888 161.28-87.04 210.944L378.88 460.8zM576 870.4 512 1024H409.6l256-614.4H768l256 614.4H921.6l-64-153.6H576zM618.496 768h196.608L716.8 532.48 618.496 768z"></path></svg><!--]--><span class="arrow"></span><ul class="nav-dropdown"><li class="dropdown-item"><a class="route-link nav-link active" href="/UserGuide/V1.2.x/Reference/DataNode-Config-Manual.html" aria-label="English"><!---->English<!----></a></li><li class="dropdown-item"><a class="route-link nav-link" href="/zh/UserGuide/V1.2.x/Reference/DataNode-Config-Manual.html" aria-label="简体中文"><!---->简体中文<!----></a></li></ul></button></div></div><div class="vp-nav-item hide-in-mobile"><button type="button" id="appearance-switch"><svg xmlns="http://www.w3.org/2000/svg" class="icon auto-icon" viewBox="0 0 1024 1024" fill="currentColor" aria-label="auto icon" style="display:none;"><path d="M512 992C246.92 992 32 777.08 32 512S246.92 32 512 32s480 214.92 480 480-214.92 480-480 480zm0-840c-198.78 0-360 161.22-360 360 0 198.84 161.22 360 360 360s360-161.16 360-360c0-198.78-161.22-360-360-360zm0 660V212c165.72 0 300 134.34 300 300 0 165.72-134.28 300-300 300z"></path></svg><svg xmlns="http://www.w3.org/2000/svg" class="icon dark-icon" viewBox="0 0 1024 1024" fill="currentColor" aria-label="dark icon" style="display:none;"><path d="M524.8 938.667h-4.267a439.893 439.893 0 0 1-313.173-134.4 446.293 446.293 0 0 1-11.093-597.334A432.213 432.213 0 0 1 366.933 90.027a42.667 42.667 0 0 1 45.227 9.386 42.667 42.667 0 0 1 10.24 42.667 358.4 358.4 0 0 0 82.773 375.893 361.387 361.387 0 0 0 376.747 82.774 42.667 42.667 0 0 1 54.187 55.04 433.493 433.493 0 0 1-99.84 154.88 438.613 438.613 0 0 1-311.467 128z"></path></svg><svg xmlns="http://www.w3.org/2000/svg" class="icon light-icon" viewBox="0 0 1024 1024" fill="currentColor" aria-label="light icon" style="display:block;"><path d="M952 552h-80a40 40 0 0 1 0-80h80a40 40 0 0 1 0 80zM801.88 280.08a41 41 0 0 1-57.96-57.96l57.96-58a41.04 41.04 0 0 1 58 58l-58 57.96zM512 752a240 240 0 1 1 0-480 240 240 0 0 1 0 480zm0-560a40 40 0 0 1-40-40V72a40 40 0 0 1 80 0v80a40 40 0 0 1-40 40zm-289.88 88.08-58-57.96a41.04 41.04 0 0 1 58-58l57.96 58a41 41 0 0 1-57.96 57.96zM192 512a40 40 0 0 1-40 40H72a40 40 0 0 1 0-80h80a40 40 0 0 1 40 40zm30.12 231.92a41 41 0 0 1 57.96 57.96l-57.96 58a41.04 41.04 0 0 1-58-58l58-57.96zM512 832a40 40 0 0 1 40 40v80a40 40 0 0 1-80 0v-80a40 40 0 0 1 40-40zm289.88-88.08 58 57.96a41.04 41.04 0 0 1-58 58l-57.96-58a41 41 0 0 1 57.96-57.96z"></path></svg></button></div><div class="vp-nav-item vp-action"><a class="vp-action-link" href="https://github.com/apache/iotdb" target="_blank" rel="noopener noreferrer" aria-label="GitHub"><svg xmlns="http://www.w3.org/2000/svg" class="icon github-icon" viewBox="0 0 1024 1024" fill="currentColor" aria-label="github icon" style="width:1.25rem;height:1.25rem;vertical-align:middle;"><path d="M511.957 21.333C241.024 21.333 21.333 240.981 21.333 512c0 216.832 140.544 400.725 335.574 465.664 24.49 4.395 32.256-10.07 32.256-23.083 0-11.69.256-44.245 0-85.205-136.448 29.61-164.736-64.64-164.736-64.64-22.315-56.704-54.4-71.765-54.4-71.765-44.587-30.464 3.285-29.824 3.285-29.824 49.195 3.413 75.179 50.517 75.179 50.517 43.776 75.008 114.816 53.333 142.762 40.79 4.523-31.66 17.152-53.377 31.19-65.537-108.971-12.458-223.488-54.485-223.488-242.602 0-53.547 19.114-97.323 50.517-131.67-5.035-12.33-21.93-62.293 4.779-129.834 0 0 41.258-13.184 134.912 50.346a469.803 469.803 0 0 1 122.88-16.554c41.642.213 83.626 5.632 122.88 16.554 93.653-63.488 134.784-50.346 134.784-50.346 26.752 67.541 9.898 117.504 4.864 129.834 31.402 34.347 50.474 78.123 50.474 131.67 0 188.586-114.73 230.016-224.042 242.09 17.578 15.232 33.578 44.672 33.578 90.454v135.85c0 13.142 7.936 27.606 32.854 22.87C862.25 912.597 1002.667 728.747 1002.667 512c0-271.019-219.648-490.667-490.71-490.667z"></path></svg></a></div><!--]--><!--[--><!----><!--]--><button type="button" class="vp-toggle-navbar-button" aria-label="Toggle Navbar" aria-expanded="false" aria-controls="nav-screen"><span><span class="vp-top"></span><span class="vp-middle"></span><span class="vp-bottom"></span></span></button></div></header><!----><!--]--><!----><div class="toggle-sidebar-wrapper"><span class="arrow start"></span></div><aside id="sidebar" class="vp-sidebar"><!--[--><!----><!--]--><ul class="vp-sidebar-links"><li><section class="vp-sidebar-group"><p class="vp-sidebar-header"><!----><span class="vp-sidebar-title">IoTDB User Guide (V1.2.x)</span><!----></p><ul class="vp-sidebar-links"></ul></section></li><li><section class="vp-sidebar-group"><button class="vp-sidebar-header clickable" type="button"><!----><span class="vp-sidebar-title">About IoTDB</span><span class="vp-arrow end"></span></button><!----></section></li><li><section class="vp-sidebar-group"><button class="vp-sidebar-header clickable" type="button"><!----><span class="vp-sidebar-title">Quick Start</span><span class="vp-arrow end"></span></button><!----></section></li><li><section class="vp-sidebar-group"><button class="vp-sidebar-header clickable" type="button"><!----><span class="vp-sidebar-title">Basic Concept</span><span class="vp-arrow end"></span></button><!----></section></li><li><section class="vp-sidebar-group"><button class="vp-sidebar-header clickable" type="button"><!----><span class="vp-sidebar-title">Deployment &amp; Maintenance</span><span class="vp-arrow end"></span></button><!----></section></li><li><section class="vp-sidebar-group"><button class="vp-sidebar-header clickable" type="button"><!----><span class="vp-sidebar-title">User Manual</span><span class="vp-arrow end"></span></button><!----></section></li><li><section class="vp-sidebar-group"><button class="vp-sidebar-header clickable" type="button"><!----><span class="vp-sidebar-title">Tools System</span><span class="vp-arrow end"></span></button><!----></section></li><li><section class="vp-sidebar-group"><button class="vp-sidebar-header clickable" type="button"><!----><span class="vp-sidebar-title">API</span><span class="vp-arrow end"></span></button><!----></section></li><li><section class="vp-sidebar-group"><button class="vp-sidebar-header clickable" type="button"><!----><span class="vp-sidebar-title">Ecosystem Integration</span><span class="vp-arrow end"></span></button><!----></section></li><li><section class="vp-sidebar-group"><button class="vp-sidebar-header clickable" type="button"><!----><span class="vp-sidebar-title">SQL Manual</span><span class="vp-arrow end"></span></button><!----></section></li><li><section class="vp-sidebar-group"><button class="vp-sidebar-header clickable" type="button"><!----><span class="vp-sidebar-title">FAQ</span><span class="vp-arrow end"></span></button><!----></section></li><li><section class="vp-sidebar-group"><button class="vp-sidebar-header clickable" type="button"><!----><span class="vp-sidebar-title">Reference</span><span class="vp-arrow end"></span></button><!----></section></li></ul><!--[--><!----><!--]--></aside><!--[--><main id="main-content" class="vp-page"><!--[--><!--[--><!----><!--]--><!----><nav class="vp-breadcrumb disable"></nav><div class="vp-page-title"><h1><!---->DataNode Configuration Parameters</h1><div class="page-info"><!----><!----><span class="page-date-info" aria-label="Writing Date"><svg xmlns="http://www.w3.org/2000/svg" class="icon calendar-icon" viewBox="0 0 1024 1024" fill="currentColor" aria-label="calendar icon"><path d="M716.4 110.137c0-18.753-14.72-33.473-33.472-33.473-18.753 0-33.473 14.72-33.473 33.473v33.473h66.993v-33.473zm-334.87 0c0-18.753-14.72-33.473-33.473-33.473s-33.52 14.72-33.52 33.473v33.473h66.993v-33.473zm468.81 33.52H716.4v100.465c0 18.753-14.72 33.473-33.472 33.473a33.145 33.145 0 01-33.473-33.473V143.657H381.53v100.465c0 18.753-14.72 33.473-33.473 33.473a33.145 33.145 0 01-33.473-33.473V143.657H180.6A134.314 134.314 0 0046.66 277.595v535.756A134.314 134.314 0 00180.6 947.289h669.74a134.36 134.36 0 00133.94-133.938V277.595a134.314 134.314 0 00-133.94-133.938zm33.473 267.877H147.126a33.145 33.145 0 01-33.473-33.473c0-18.752 14.72-33.473 33.473-33.473h736.687c18.752 0 33.472 14.72 33.472 33.473a33.145 33.145 0 01-33.472 33.473z"></path></svg><span><!----></span><meta property="datePublished" content="2023-07-10T03:11:17.000Z"></span><span class="page-pageview-info" aria-label="Page views"><svg xmlns="http://www.w3.org/2000/svg" class="icon eye-icon" viewBox="0 0 1024 1024" fill="currentColor" aria-label="eye icon"><path d="M992 512.096c0-5.76-.992-10.592-1.28-11.136-.192-2.88-1.152-8.064-2.08-10.816-.256-.672-.544-1.376-.832-2.08-.48-1.568-1.024-3.104-1.6-4.32C897.664 290.112 707.104 160 512 160c-195.072 0-385.632 130.016-473.76 322.592-1.056 2.112-1.792 4.096-2.272 5.856a55.512 55.512 0 00-.64 1.6c-1.76 5.088-1.792 8.64-1.632 7.744-.832 3.744-1.568 11.168-1.568 11.168-.224 2.272-.224 4.032.032 6.304 0 0 .736 6.464 1.088 7.808.128 1.824.576 4.512 1.12 6.976h-.032c.448 2.08 1.12 4.096 1.984 6.08.48 1.536.992 2.976 1.472 4.032C126.432 733.856 316.992 864 512 864c195.136 0 385.696-130.048 473.216-321.696 1.376-2.496 2.24-4.832 2.848-6.912.256-.608.48-1.184.672-1.728 1.536-4.48 1.856-8.32 1.728-8.32l-.032.032c.608-3.104 1.568-7.744 1.568-13.28zM512 672c-88.224 0-160-71.776-160-160s71.776-160 160-160 160 71.776 160 160-71.776 160-160 160z"></path></svg><span id="ArtalkPV" class="vp-pageview waline-pageview-count" data-path="/UserGuide/V1.2.x/Reference/DataNode-Config-Manual.html" data-page-key="/UserGuide/V1.2.x/Reference/DataNode-Config-Manual.html">...</span></span><span class="page-reading-time-info" aria-label="Reading Time"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewBox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>About 5 min</span><meta property="timeRequired" content="PT5M"></span><!----><!----></div><hr></div><div class="vp-toc-placeholder"><aside id="toc"><!--[--><!----><!--]--><div class="vp-toc-header">On This Page<button type="button" class="print-button" title="Print"><svg xmlns="http://www.w3.org/2000/svg" class="icon print-icon" viewBox="0 0 1024 1024" fill="currentColor" aria-label="print icon"><path d="M819.2 364.8h-44.8V128c0-17.067-14.933-32-32-32H281.6c-17.067 0-32 14.933-32 32v236.8h-44.8C145.067 364.8 96 413.867 96 473.6v192c0 59.733 49.067 108.8 108.8 108.8h44.8V896c0 17.067 14.933 32 32 32h460.8c17.067 0 32-14.933 32-32V774.4h44.8c59.733 0 108.8-49.067 108.8-108.8v-192c0-59.733-49.067-108.8-108.8-108.8zM313.6 160h396.8v204.8H313.6V160zm396.8 704H313.6V620.8h396.8V864zM864 665.6c0 25.6-19.2 44.8-44.8 44.8h-44.8V588.8c0-17.067-14.933-32-32-32H281.6c-17.067 0-32 14.933-32 32v121.6h-44.8c-25.6 0-44.8-19.2-44.8-44.8v-192c0-25.6 19.2-44.8 44.8-44.8h614.4c25.6 0 44.8 19.2 44.8 44.8v192z"></path></svg></button><div class="arrow end"></div></div><div class="vp-toc-wrapper"><ul class="vp-toc-list"><!--[--><li class="vp-toc-item"><a class="route-link vp-toc-link level2" href="#hot-modification-configuration">Hot Modification Configuration</a></li><!----><!--]--><!--[--><li class="vp-toc-item"><a class="route-link vp-toc-link level2" href="#environment-configuration-file-datanode-env-sh-bat">Environment Configuration File（datanode-env.sh/bat）</a></li><!----><!--]--><!--[--><li class="vp-toc-item"><a class="route-link vp-toc-link level2" href="#jmx-authorization">JMX Authorization</a></li><!----><!--]--><!--[--><li class="vp-toc-item"><a class="route-link vp-toc-link level2" href="#datanode-standalone-configuration-file-iotdb-datanode-properties">DataNode/Standalone Configuration File (iotdb-datanode.properties)</a></li><li><ul class="vp-toc-list"><!--[--><li class="vp-toc-item"><a class="route-link vp-toc-link level3" href="#data-node-rpc-configuration">Data Node RPC Configuration</a></li><!----><!--]--><!--[--><li class="vp-toc-item"><a class="route-link vp-toc-link level3" href="#target-config-nodes">Target Config Nodes</a></li><!----><!--]--><!--[--><li class="vp-toc-item"><a class="route-link vp-toc-link level3" href="#connection-configuration">Connection Configuration</a></li><!----><!--]--><!--[--><li class="vp-toc-item"><a class="route-link vp-toc-link level3" href="#dictionary-configuration">Dictionary Configuration</a></li><!----><!--]--><!--[--><li class="vp-toc-item"><a class="route-link vp-toc-link level3" href="#metric-configuration">Metric Configuration</a></li><!----><!--]--></ul></li><!--]--><!--[--><li class="vp-toc-item"><a class="route-link vp-toc-link level2" href="#enable-gc-log">Enable GC log</a></li><!----><!--]--></ul><div class="vp-toc-marker" style="top:-1.7rem;"></div></div><!--[--><!----><!--]--></aside></div><!--[--><!----><!--]--><div class="theme-hope-content"><h1 id="datanode-configuration-parameters" tabindex="-1"><a class="header-anchor" href="#datanode-configuration-parameters"><span>DataNode Configuration Parameters</span></a></h1><p>We use the same configuration files for IoTDB DataNode and Standalone version, all under the <code>conf</code>.</p><ul><li><p><code>datanode-env.sh/bat</code>：Environment configurations, in which we could set the memory allocation of DataNode and Standalone.</p></li><li><p><code>iotdb-datanode.properties</code>：IoTDB DataNode system configurations.</p></li></ul><h2 id="hot-modification-configuration" tabindex="-1"><a class="header-anchor" href="#hot-modification-configuration"><span>Hot Modification Configuration</span></a></h2><p>For the convenience of users, IoTDB provides users with hot modification function, that is, modifying some configuration parameters in <code>iotdb-datanode.properties</code> and <code>iotdb-common.properties</code> during the system operation and applying them to the system immediately.<br> In the parameters described below, these parameters whose way of <code>Effective</code> is <code>hot-load</code> support hot modification.</p><p>Trigger way: The client sends the command(sql) <code>load configuration</code> to the IoTDB server.</p><h2 id="environment-configuration-file-datanode-env-sh-bat" tabindex="-1"><a class="header-anchor" href="#environment-configuration-file-datanode-env-sh-bat"><span>Environment Configuration File（<a href="http://datanode-env.sh/bat%EF%BC%89" target="_blank" rel="noopener noreferrer">datanode-env.sh/bat）<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span></a></span></a></h2><p>The environment configuration file is mainly used to configure the Java environment related parameters when DataNode is running, such as JVM related configuration. This part of the configuration is passed to the JVM when the DataNode starts.</p><p>The details of each parameter are as follows:</p><ul><li>MAX_HEAP_SIZE</li></ul><table><thead><tr><th style="text-align:center;">Name</th><th style="text-align:left;">MAX_HEAP_SIZE</th></tr></thead><tbody><tr><td style="text-align:center;">Description</td><td style="text-align:left;">The maximum heap memory size that IoTDB can use</td></tr><tr><td style="text-align:center;">Type</td><td style="text-align:left;">String</td></tr><tr><td style="text-align:center;">Default</td><td style="text-align:left;">On Linux or MacOS, the default is one quarter of the memory. On Windows, the default value for 32-bit systems is 512M, and the default for 64-bit systems is 2G.</td></tr><tr><td style="text-align:center;">Effective</td><td style="text-align:left;">After restarting system</td></tr></tbody></table><ul><li>HEAP_NEWSIZE</li></ul><table><thead><tr><th style="text-align:center;">Name</th><th style="text-align:left;">HEAP_NEWSIZE</th></tr></thead><tbody><tr><td style="text-align:center;">Description</td><td style="text-align:left;">The minimum heap memory size that IoTDB will use when startup</td></tr><tr><td style="text-align:center;">Type</td><td style="text-align:left;">String</td></tr><tr><td style="text-align:center;">Default</td><td style="text-align:left;">On Linux or MacOS, the default is min{cores * 100M, one quarter of MAX_HEAP_SIZE}. On Windows, the default value for 32-bit systems is 512M, and the default for 64-bit systems is 2G.</td></tr><tr><td style="text-align:center;">Effective</td><td style="text-align:left;">After restarting system</td></tr></tbody></table><ul><li>MAX_DIRECT_MEMORY_SIZE</li></ul><table><thead><tr><th style="text-align:center;">Name</th><th style="text-align:left;">MAX_DIRECT_MEMORY_SIZE</th></tr></thead><tbody><tr><td style="text-align:center;">Description</td><td style="text-align:left;">The max direct memory that IoTDB could use</td></tr><tr><td style="text-align:center;">Type</td><td style="text-align:left;">String</td></tr><tr><td style="text-align:center;">Default</td><td style="text-align:left;">Equal to the MAX_HEAP_SIZE</td></tr><tr><td style="text-align:center;">Effective</td><td style="text-align:left;">After restarting system</td></tr></tbody></table><ul><li>JMX_LOCAL</li></ul><table><thead><tr><th style="text-align:center;">Name</th><th style="text-align:left;">JMX_LOCAL</th></tr></thead><tbody><tr><td style="text-align:center;">Description</td><td style="text-align:left;">JMX monitoring mode, configured as yes to allow only local monitoring, no to allow remote monitoring</td></tr><tr><td style="text-align:center;">Type</td><td style="text-align:left;">Enum String: &quot;true&quot;, &quot;false&quot;</td></tr><tr><td style="text-align:center;">Default</td><td style="text-align:left;">true</td></tr><tr><td style="text-align:center;">Effective</td><td style="text-align:left;">After restarting system</td></tr></tbody></table><ul><li>JMX_PORT</li></ul><table><thead><tr><th style="text-align:center;">Name</th><th style="text-align:left;">JMX_PORT</th></tr></thead><tbody><tr><td style="text-align:center;">Description</td><td style="text-align:left;">JMX listening port. Please confirm that the port is not a system reserved port and is not occupied</td></tr><tr><td style="text-align:center;">Type</td><td style="text-align:left;">Short Int: [0,65535]</td></tr><tr><td style="text-align:center;">Default</td><td style="text-align:left;">31999</td></tr><tr><td style="text-align:center;">Effective</td><td style="text-align:left;">After restarting system</td></tr></tbody></table><ul><li>JMX_IP</li></ul><table><thead><tr><th style="text-align:center;">Name</th><th style="text-align:left;">JMX_IP</th></tr></thead><tbody><tr><td style="text-align:center;">Description</td><td style="text-align:left;">JMX listening address. Only take effect if JMX_LOCAL=false. 0.0.0.0 is never allowed</td></tr><tr><td style="text-align:center;">Type</td><td style="text-align:left;">String</td></tr><tr><td style="text-align:center;">Default</td><td style="text-align:left;">127.0.0.1</td></tr><tr><td style="text-align:center;">Effective</td><td style="text-align:left;">After restarting system</td></tr></tbody></table><h2 id="jmx-authorization" tabindex="-1"><a class="header-anchor" href="#jmx-authorization"><span>JMX Authorization</span></a></h2><p>We <strong>STRONGLY RECOMMENDED</strong> you CHANGE the PASSWORD for the JMX remote connection.</p><p>The user and passwords are in ${IOTDB_CONF}/conf/jmx.password.</p><p>The permission definitions are in ${IOTDB_CONF}/conf/jmx.access.</p><h2 id="datanode-standalone-configuration-file-iotdb-datanode-properties" tabindex="-1"><a class="header-anchor" href="#datanode-standalone-configuration-file-iotdb-datanode-properties"><span>DataNode/Standalone Configuration File (iotdb-datanode.properties)</span></a></h2><h3 id="data-node-rpc-configuration" tabindex="-1"><a class="header-anchor" href="#data-node-rpc-configuration"><span>Data Node RPC Configuration</span></a></h3><ul><li>dn_rpc_address</li></ul><table><thead><tr><th style="text-align:center;">Name</th><th style="text-align:left;">dn_rpc_address</th></tr></thead><tbody><tr><td style="text-align:center;">Description</td><td style="text-align:left;">The client rpc service listens on the address.</td></tr><tr><td style="text-align:center;">Type</td><td style="text-align:left;">String</td></tr><tr><td style="text-align:center;">Default</td><td style="text-align:left;">0.0.0.0</td></tr><tr><td style="text-align:center;">Effective</td><td style="text-align:left;">After restarting system</td></tr></tbody></table><ul><li>dn_rpc_port</li></ul><table><thead><tr><th style="text-align:center;">Name</th><th style="text-align:left;">dn_rpc_port</th></tr></thead><tbody><tr><td style="text-align:center;">Description</td><td style="text-align:left;">The client rpc service listens on the port.</td></tr><tr><td style="text-align:center;">Type</td><td style="text-align:left;">Short Int : [0,65535]</td></tr><tr><td style="text-align:center;">Default</td><td style="text-align:left;">6667</td></tr><tr><td style="text-align:center;">Effective</td><td style="text-align:left;">After restarting system</td></tr></tbody></table><ul><li>dn_internal_address</li></ul><table><thead><tr><th style="text-align:center;">Name</th><th style="text-align:left;">dn_internal_address</th></tr></thead><tbody><tr><td style="text-align:center;">Description</td><td style="text-align:left;">DataNode internal service host/IP</td></tr><tr><td style="text-align:center;">Type</td><td style="text-align:left;">string</td></tr><tr><td style="text-align:center;">Default</td><td style="text-align:left;">127.0.0.1</td></tr><tr><td style="text-align:center;">Effective</td><td style="text-align:left;">Only allowed to be modified in first start up</td></tr></tbody></table><ul><li>dn_internal_port</li></ul><table><thead><tr><th style="text-align:center;">Name</th><th style="text-align:left;">dn_internal_port</th></tr></thead><tbody><tr><td style="text-align:center;">Description</td><td style="text-align:left;">DataNode internal service port</td></tr><tr><td style="text-align:center;">Type</td><td style="text-align:left;">int</td></tr><tr><td style="text-align:center;">Default</td><td style="text-align:left;">10730</td></tr><tr><td style="text-align:center;">Effective</td><td style="text-align:left;">Only allowed to be modified in first start up</td></tr></tbody></table><ul><li>dn_mpp_data_exchange_port</li></ul><table><thead><tr><th style="text-align:center;">Name</th><th style="text-align:left;">mpp_data_exchange_port</th></tr></thead><tbody><tr><td style="text-align:center;">Description</td><td style="text-align:left;">MPP data exchange port</td></tr><tr><td style="text-align:center;">Type</td><td style="text-align:left;">int</td></tr><tr><td style="text-align:center;">Default</td><td style="text-align:left;">10740</td></tr><tr><td style="text-align:center;">Effective</td><td style="text-align:left;">Only allowed to be modified in first start up</td></tr></tbody></table><ul><li>dn_schema_region_consensus_port</li></ul><table><thead><tr><th style="text-align:center;">Name</th><th style="text-align:left;">dn_schema_region_consensus_port</th></tr></thead><tbody><tr><td style="text-align:center;">Description</td><td style="text-align:left;">DataNode Schema replica communication port for consensus</td></tr><tr><td style="text-align:center;">Type</td><td style="text-align:left;">int</td></tr><tr><td style="text-align:center;">Default</td><td style="text-align:left;">10750</td></tr><tr><td style="text-align:center;">Effective</td><td style="text-align:left;">Only allowed to be modified in first start up</td></tr></tbody></table><ul><li>dn_data_region_consensus_port</li></ul><table><thead><tr><th style="text-align:center;">Name</th><th style="text-align:left;">dn_data_region_consensus_port</th></tr></thead><tbody><tr><td style="text-align:center;">Description</td><td style="text-align:left;">DataNode Data replica communication port for consensus</td></tr><tr><td style="text-align:center;">Type</td><td style="text-align:left;">int</td></tr><tr><td style="text-align:center;">Default</td><td style="text-align:left;">10760</td></tr><tr><td style="text-align:center;">Effective</td><td style="text-align:left;">Only allowed to be modified in first start up</td></tr></tbody></table><ul><li>dn_join_cluster_retry_interval_ms</li></ul><table><thead><tr><th style="text-align:center;">Name</th><th style="text-align:left;">dn_join_cluster_retry_interval_ms</th></tr></thead><tbody><tr><td style="text-align:center;">Description</td><td style="text-align:left;">The time of data node waiting for the next retry to join into the cluster</td></tr><tr><td style="text-align:center;">Type</td><td style="text-align:left;">long</td></tr><tr><td style="text-align:center;">Default</td><td style="text-align:left;">5000</td></tr><tr><td style="text-align:center;">Effective</td><td style="text-align:left;">After restarting system</td></tr></tbody></table><h3 id="target-config-nodes" tabindex="-1"><a class="header-anchor" href="#target-config-nodes"><span>Target Config Nodes</span></a></h3><ul><li>dn_target_config_node_list</li></ul><table><thead><tr><th style="text-align:center;">Name</th><th style="text-align:left;">dn_target_config_node_list</th></tr></thead><tbody><tr><td style="text-align:center;">Description</td><td style="text-align:left;">ConfigNode Address for DataNode to join cluster</td></tr><tr><td style="text-align:center;">Type</td><td style="text-align:left;">String</td></tr><tr><td style="text-align:center;">Default</td><td style="text-align:left;">127.0.0.1:10710</td></tr><tr><td style="text-align:center;">Effective</td><td style="text-align:left;">Only allowed to be modified in first start up</td></tr></tbody></table><h3 id="connection-configuration" tabindex="-1"><a class="header-anchor" href="#connection-configuration"><span>Connection Configuration</span></a></h3><ul><li>dn_rpc_thrift_compression_enable</li></ul><table><thead><tr><th style="text-align:center;">Name</th><th style="text-align:left;">dn_rpc_thrift_compression_enable</th></tr></thead><tbody><tr><td style="text-align:center;">Description</td><td style="text-align:left;">Whether enable thrift&#39;s compression (using GZIP).</td></tr><tr><td style="text-align:center;">Type</td><td style="text-align:left;">Boolean</td></tr><tr><td style="text-align:center;">Default</td><td style="text-align:left;">false</td></tr><tr><td style="text-align:center;">Effective</td><td style="text-align:left;">After restarting system</td></tr></tbody></table><ul><li>dn_rpc_advanced_compression_enable</li></ul><table><thead><tr><th style="text-align:center;">Name</th><th style="text-align:left;">dn_rpc_advanced_compression_enable</th></tr></thead><tbody><tr><td style="text-align:center;">Description</td><td style="text-align:left;">Whether enable thrift&#39;s advanced compression.</td></tr><tr><td style="text-align:center;">Type</td><td style="text-align:left;">Boolean</td></tr><tr><td style="text-align:center;">Default</td><td style="text-align:left;">false</td></tr><tr><td style="text-align:center;">Effective</td><td style="text-align:left;">After restarting system</td></tr></tbody></table><ul><li>dn_rpc_selector_thread_count</li></ul><table><thead><tr><th style="text-align:center;">Name</th><th style="text-align:left;">dn_rpc_selector_thread_count</th></tr></thead><tbody><tr><td style="text-align:center;">Description</td><td style="text-align:left;">The number of rpc selector thread.</td></tr><tr><td style="text-align:center;">Type</td><td style="text-align:left;">int</td></tr><tr><td style="text-align:center;">Default</td><td style="text-align:left;">false</td></tr><tr><td style="text-align:center;">Effective</td><td style="text-align:left;">After restarting system</td></tr></tbody></table><ul><li>dn_rpc_min_concurrent_client_num</li></ul><table><thead><tr><th style="text-align:center;">Name</th><th style="text-align:left;">dn_rpc_min_concurrent_client_num</th></tr></thead><tbody><tr><td style="text-align:center;">Description</td><td style="text-align:left;">Minimum concurrent rpc connections</td></tr><tr><td style="text-align:center;">Type</td><td style="text-align:left;">Short Int : [0,65535]</td></tr><tr><td style="text-align:center;">Description</td><td style="text-align:left;">1</td></tr><tr><td style="text-align:center;">Effective</td><td style="text-align:left;">After restarting system</td></tr></tbody></table><ul><li>dn_rpc_max_concurrent_client_num</li></ul><table><thead><tr><th style="text-align:center;">Name</th><th style="text-align:left;">dn_rpc_max_concurrent_client_num</th></tr></thead><tbody><tr><td style="text-align:center;">Description</td><td style="text-align:left;">Max concurrent rpc connections</td></tr><tr><td style="text-align:center;">Type</td><td style="text-align:left;">Short Int : [0,65535]</td></tr><tr><td style="text-align:center;">Description</td><td style="text-align:left;">65535</td></tr><tr><td style="text-align:center;">Effective</td><td style="text-align:left;">After restarting system</td></tr></tbody></table><ul><li>dn_thrift_max_frame_size</li></ul><table><thead><tr><th style="text-align:center;">Name</th><th style="text-align:left;">dn_thrift_max_frame_size</th></tr></thead><tbody><tr><td style="text-align:center;">Description</td><td style="text-align:left;">Max size of bytes of each thrift RPC request/response</td></tr><tr><td style="text-align:center;">Type</td><td style="text-align:left;">Long</td></tr><tr><td style="text-align:center;">Unit</td><td style="text-align:left;">Byte</td></tr><tr><td style="text-align:center;">Default</td><td style="text-align:left;">536870912</td></tr><tr><td style="text-align:center;">Effective</td><td style="text-align:left;">After restarting system</td></tr></tbody></table><ul><li>dn_thrift_init_buffer_size</li></ul><table><thead><tr><th style="text-align:center;">Name</th><th style="text-align:left;">dn_thrift_init_buffer_size</th></tr></thead><tbody><tr><td style="text-align:center;">Description</td><td style="text-align:left;">Initial size of bytes of buffer that thrift used</td></tr><tr><td style="text-align:center;">Type</td><td style="text-align:left;">long</td></tr><tr><td style="text-align:center;">Default</td><td style="text-align:left;">1024</td></tr><tr><td style="text-align:center;">Effective</td><td style="text-align:left;">After restarting system</td></tr></tbody></table><ul><li>dn_core_client_count_for_each_node_in_client_manager</li></ul><table><thead><tr><th style="text-align:center;">Name</th><th style="text-align:left;">dn_core_client_count_for_each_node_in_client_manager</th></tr></thead><tbody><tr><td style="text-align:center;">Description</td><td style="text-align:left;">Number of core clients routed to each node in a ClientManager</td></tr><tr><td style="text-align:center;">Type</td><td style="text-align:left;">int</td></tr><tr><td style="text-align:center;">Default</td><td style="text-align:left;">200</td></tr><tr><td style="text-align:center;">Effective</td><td style="text-align:left;">After restarting system</td></tr></tbody></table><ul><li>dn_max_client_count_for_each_node_in_client_manager</li></ul><table><thead><tr><th style="text-align:center;">Name</th><th style="text-align:left;">dn_max_client_count_for_each_node_in_client_manager</th></tr></thead><tbody><tr><td style="text-align:center;">Description</td><td style="text-align:left;">Number of max clients routed to each node in a ClientManager</td></tr><tr><td style="text-align:center;">Type</td><td style="text-align:left;">int</td></tr><tr><td style="text-align:center;">Default</td><td style="text-align:left;">300</td></tr><tr><td style="text-align:center;">Effective</td><td style="text-align:left;">After restarting system</td></tr></tbody></table><h3 id="dictionary-configuration" tabindex="-1"><a class="header-anchor" href="#dictionary-configuration"><span>Dictionary Configuration</span></a></h3><ul><li>dn_system_dir</li></ul><table><thead><tr><th style="text-align:center;">Name</th><th style="text-align:left;">dn_system_dir</th></tr></thead><tbody><tr><td style="text-align:center;">Description</td><td style="text-align:left;">The directories of system files. It is recommended to use an absolute path.</td></tr><tr><td style="text-align:center;">Type</td><td style="text-align:left;">String</td></tr><tr><td style="text-align:center;">Default</td><td style="text-align:left;">data/datanode/system (Windows: data\datanode\system)</td></tr><tr><td style="text-align:center;">Effective</td><td style="text-align:left;">After restarting system</td></tr></tbody></table><ul><li>dn_data_dirs</li></ul><table><thead><tr><th style="text-align:center;">Name</th><th style="text-align:left;">dn_data_dirs</th></tr></thead><tbody><tr><td style="text-align:center;">Description</td><td style="text-align:left;">The directories of data files. Multiple directories are separated by comma. The starting directory of the relative path is related to the operating system. It is recommended to use an absolute path. If the path does not exist, the system will automatically create it.</td></tr><tr><td style="text-align:center;">Type</td><td style="text-align:left;">String[]</td></tr><tr><td style="text-align:center;">Default</td><td style="text-align:left;">data/datanode/data (Windows: data\datanode\data)</td></tr><tr><td style="text-align:center;">Effective</td><td style="text-align:left;">After restarting system</td></tr></tbody></table><ul><li>dn_multi_dir_strategy</li></ul><table><thead><tr><th style="text-align:center;">Name</th><th style="text-align:left;">dn_multi_dir_strategy</th></tr></thead><tbody><tr><td style="text-align:center;">Description</td><td style="text-align:left;">IoTDB&#39;s strategy for selecting directories for TsFile in tsfile_dir. You can use a simple class name or a full name of the class. The system provides the following three strategies: <br>1. SequenceStrategy: IoTDB selects the directory from tsfile_dir in order, traverses all the directories in tsfile_dir in turn, and keeps counting;<br>2. MaxDiskUsableSpaceFirstStrategy: IoTDB first selects the directory with the largest free disk space in tsfile_dir;<br>You can complete a user-defined policy in the following ways:<br>1. Inherit the org.apache.iotdb.db.storageengine.rescon.disk.strategy.DirectoryStrategy class and implement its own Strategy method;<br>2. Fill in the configuration class with the full class name of the implemented class (package name plus class name, UserDfineStrategyPackage);<br>3. Add the jar file to the project.</td></tr><tr><td style="text-align:center;">Type</td><td style="text-align:left;">String</td></tr><tr><td style="text-align:center;">Default</td><td style="text-align:left;">SequenceStrategy</td></tr><tr><td style="text-align:center;">Effective</td><td style="text-align:left;">hot-load</td></tr></tbody></table><ul><li>dn_consensus_dir</li></ul><table><thead><tr><th style="text-align:center;">Name</th><th style="text-align:left;">dn_consensus_dir</th></tr></thead><tbody><tr><td style="text-align:center;">Description</td><td style="text-align:left;">The directories of consensus files. It is recommended to use an absolute path.</td></tr><tr><td style="text-align:center;">Type</td><td style="text-align:left;">String</td></tr><tr><td style="text-align:center;">Default</td><td style="text-align:left;">data/datanode/consensus</td></tr><tr><td style="text-align:center;">Effective</td><td style="text-align:left;">After restarting system</td></tr></tbody></table><ul><li>dn_wal_dirs</li></ul><table><thead><tr><th style="text-align:center;">Name</th><th style="text-align:left;">dn_wal_dirs</th></tr></thead><tbody><tr><td style="text-align:center;">Description</td><td style="text-align:left;">Write Ahead Log storage path. It is recommended to use an absolute path.</td></tr><tr><td style="text-align:center;">Type</td><td style="text-align:left;">String</td></tr><tr><td style="text-align:center;">Default</td><td style="text-align:left;">data/datanode/wal</td></tr><tr><td style="text-align:center;">Effective</td><td style="text-align:left;">After restarting system</td></tr></tbody></table><ul><li>dn_tracing_dir</li></ul><table><thead><tr><th style="text-align:center;">Name</th><th style="text-align:left;">dn_tracing_dir</th></tr></thead><tbody><tr><td style="text-align:center;">Description</td><td style="text-align:left;">The tracing root directory path. It is recommended to use an absolute path.</td></tr><tr><td style="text-align:center;">Type</td><td style="text-align:left;">String</td></tr><tr><td style="text-align:center;">Default</td><td style="text-align:left;">datanode/tracing</td></tr><tr><td style="text-align:center;">Effective</td><td style="text-align:left;">After restarting system</td></tr></tbody></table><ul><li>dn_sync_dir</li></ul><table><thead><tr><th style="text-align:center;">Name</th><th style="text-align:left;">dn_sync_dir</th></tr></thead><tbody><tr><td style="text-align:center;">Description</td><td style="text-align:left;">The directories of sync files. It is recommended to use an absolute path.</td></tr><tr><td style="text-align:center;">Type</td><td style="text-align:left;">String</td></tr><tr><td style="text-align:center;">Default</td><td style="text-align:left;">data/datanode/sync</td></tr><tr><td style="text-align:center;">Effective</td><td style="text-align:left;">After restarting system</td></tr></tbody></table><h3 id="metric-configuration" tabindex="-1"><a class="header-anchor" href="#metric-configuration"><span>Metric Configuration</span></a></h3><h2 id="enable-gc-log" tabindex="-1"><a class="header-anchor" href="#enable-gc-log"><span>Enable GC log</span></a></h2><p>GC log is off by default.<br> For performance tuning, you may want to collect the GC info.</p><p>To enable GC log, just add a parameter &quot;printgc&quot; when you start the DataNode.</p><div class="language-bash line-numbers-mode" data-ext="sh" data-title="sh"><pre class="language-bash"><code><span class="token function">nohup</span> sbin/start-datanode.sh printgc <span class="token operator">&gt;</span>/dev/null <span class="token operator"><span class="token file-descriptor important">2</span>&gt;</span><span class="token file-descriptor important">&amp;1</span> <span class="token operator">&amp;</span>
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>Or</p><div class="language-cmd line-numbers-mode" data-ext="cmd" data-title="cmd"><pre class="language-cmd"><code>sbin\start-datanode.bat printgc
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>GC log is stored at <code>IOTDB_HOME/logs/gc.log</code>.<br> There will be at most 10 gc.log.* files and each one can reach to 10MB.</p></div><!--[--><!----><!--]--><footer class="vp-page-meta"><div class="vp-meta-item edit-link"><a href="https://github.com/apache/iotdb-docs/edit/main/src/UserGuide/V1.2.x/Reference/DataNode-Config-Manual.md" rel="noopener noreferrer" target="_blank" aria-label="Found Error? Edit this page on GitHub" class="nav-link vp-meta-label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewBox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->Found Error? Edit this page on GitHub<span><svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg><span class="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="vp-meta-item git-info"><div class="update-time"><span class="vp-meta-label">Last update: </span><!----></div><!----></div></footer><!----><!----><!--[--><!----><!--]--><!--]--></main><!--]--><footer style="padding-bottom:2rem;"><span id="doc-version" style="display:none;">rel/1.2</span><p style="text-align:center;color:#909399;font-size:12px;margin:0 30px;">Copyright © 2024 The Apache Software Foundation.<br> Apache and the Apache feather logo are trademarks of The Apache Software Foundation</p><p style="text-align:center;margin-top:10px;color:#909399;font-size:12px;margin:0 30px;"><strong>Have a question?</strong> Connect with us on QQ, WeChat, or Slack. <a href="https://github.com/apache/iotdb/issues/1995">Join the community</a> now.</p></footer></div><!--]--><!--]--><!--[--><!----><!--]--><!--]--></div>
    <script type="module" src="/assets/app-B-0YFdX2.js" defer></script>
  </body>
</html>