use-cases/caching/database-caching.html - ignite-website - Git at Google

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 <!DOCTYPE html>
 <html>
 <head>
 <link rel="canonical" href="https://ignite.apache.org/use-cases/caching/database-caching.html" />
     <meta charset="utf-8">
     <meta name="viewport" content="width=device-width, initial-scale=1.0">
     <title>Database Caching Use Case - Apache Ignite</title>
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 </head>
 <body>
 <div id="wrapper">
     <!--#include virtual="/includes/header.html" -->

     <main id="main" role="main" class="container">
         <section id="database-caching" class="page-section">
             <h1 class="first">Database Caching</h1>
             <div class="col-sm-12 col-md-12 col-xs-12" style="padding:0 0 20px 0;">
                 <div class="col-sm-6 col-md-6 col-xs-12" style="padding-left:0;">
                     <p>
                         Ignite <code>database caching</code> is implemented in the
                         <nobr><a href="/features/datagrid.html">data grid</a></nobr>
                         component. It enables users to keep the most frequently accessed data in memory, by either
                         partitioning or replicating it across a cluster of computers.
                     </p>
                     <div class="page-heading">Write-Through & Read-Through</div>
                     <p>
                         Whenever an update happens in the in-memory cache, Ignite can optionally propagate it
                         to the underlying database. Also, whenever the data is requested from cache and is not
                         there, Ignite can automatically load it from the underlying database. Such behavior
                         is called <code class="text-nowrap">write-through</code> and
                         <code class="text-nowrap">read-through</code> correspondingly.
                     </p>
                 </div>
                 <div class="col-sm-6 col-md-5 col-xs-12" style="padding-right:0">
                     <img class="img-responsive" src="/images/in_memory_data.png" width="400px" style="float:right;"/>
                 </div>
             </div>
             <div class="page-heading">Write-Behind</div>
             <p>
                 In a simple write-through mode each cache put and remove operation will involve a
                 corresponding request to the persistent storage and therefore the overall duration of
                 the cache update might be relatively long. To mitigate such cases, Ignite offers an
                 option to perform an asynchronous persistent store update also known as
                 <code class="text-nowrap">write-behind</code>.
             </p>
             <div class="page-heading">Automatic Persistence</div>
             <p>
                 Ignite ships with its own database schema mapping wizard which provides automatic support for
                 integrating with persistence stores. This utility automatically connects to the underlying database
                 and generates all the required XML OR-mapping configuration and Java domain model POJOs.
             </p>
             <div class="page-heading">In-Memory Data Grid</div>
             <p>
                 See <a href="/features/datagrid.html" class="text-nowrap" target="_blank"><b>in-memory data grid</b></a>
                 for more information.
             </p>

             <p>

             </p>
         </section>
     </main>

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	<!--
	Licensed to the Apache Software Foundation (ASF) under one
	or more contributor license agreements. See the NOTICE file
	distributed with this work for additional information
	regarding copyright ownership. The ASF licenses this file
	to you under the Apache License, Version 2.0 (the
	"License"); you may not use this file except in compliance
	with the License. You may obtain a copy of the License at

	http://www.apache.org/licenses/LICENSE-2.0

	Unless required by applicable law or agreed to in writing,
	software distributed under the License is distributed on an
	"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
	"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
	KIND, either express or implied. See the License for the
	specific language governing permissions and limitations
	under the License.
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	<!DOCTYPE html>
	<html>
	<head>
	<link rel="canonical" href="https://ignite.apache.org/use-cases/caching/database-caching.html" />
	<meta charset="utf-8">
	<meta name="viewport" content="width=device-width, initial-scale=1.0">
	<title>Database Caching Use Case - Apache Ignite</title>
	<link media="all" rel="stylesheet" href="/css/all.css?v=1514336028">
	<link href="https://netdna.bootstrapcdn.com/font-awesome/4.2.0/css/font-awesome.css" rel="stylesheet">
	<link media="all" rel="stylesheet" href="/css/syntaxhighlighter.css">
	<link href='https://fonts.googleapis.com/css?family=Open+Sans:400,300,300italic,400italic,600,600italic,700,700italic,800,800italic' rel='stylesheet' type='text/css'>

	<!--#include virtual="/includes/sh.html" -->
	</head>
	<body>
	<div id="wrapper">
	<!--#include virtual="/includes/header.html" -->

	<main id="main" role="main" class="container">
	<section id="database-caching" class="page-section">
	<h1 class="first">Database Caching</h1>
	<div class="col-sm-12 col-md-12 col-xs-12" style="padding:0 0 20px 0;">
	<div class="col-sm-6 col-md-6 col-xs-12" style="padding-left:0;">
	<p>
	Ignite <code>database caching</code> is implemented in the
	<nobr><a href="/features/datagrid.html">data grid</a></nobr>
	component. It enables users to keep the most frequently accessed data in memory, by either
	partitioning or replicating it across a cluster of computers.
	</p>
	<div class="page-heading">Write-Through & Read-Through</div>
	<p>
	Whenever an update happens in the in-memory cache, Ignite can optionally propagate it
	to the underlying database. Also, whenever the data is requested from cache and is not
	there, Ignite can automatically load it from the underlying database. Such behavior
	is called <code class="text-nowrap">write-through</code> and
	<code class="text-nowrap">read-through</code> correspondingly.
	</p>
	</div>
	<div class="col-sm-6 col-md-5 col-xs-12" style="padding-right:0">
	<img class="img-responsive" src="/images/in_memory_data.png" width="400px" style="float:right;"/>
	</div>
	</div>
	<div class="page-heading">Write-Behind</div>
	<p>
	In a simple write-through mode each cache put and remove operation will involve a
	corresponding request to the persistent storage and therefore the overall duration of
	the cache update might be relatively long. To mitigate such cases, Ignite offers an
	option to perform an asynchronous persistent store update also known as
	<code class="text-nowrap">write-behind</code>.
	</p>
	<div class="page-heading">Automatic Persistence</div>
	<p>
	Ignite ships with its own database schema mapping wizard which provides automatic support for
	integrating with persistence stores. This utility automatically connects to the underlying database
	and generates all the required XML OR-mapping configuration and Java domain model POJOs.
	</p>
	<div class="page-heading">In-Memory Data Grid</div>
	<p>
	See <a href="/features/datagrid.html" class="text-nowrap" target="_blank"><b>in-memory data grid</b></a>
	for more information.
	</p>

	<p>

	</p>
	</section>
	</main>

	<!--#include virtual="/includes/footer.html" -->
	</div>
	<!--#include virtual="/includes/scripts.html" -->
	</body>
	</html>