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| <meta name="buildDate" content="2020-10-19 20:55:12"> |
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| <title>弹性调度 :: ElasticJob</title> |
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| <style type="text/css"> |
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| </style> |
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| </head> |
| <body class="" data-url="/cn/features/elastic/"> |
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| <div id="header-wrapper"> |
| <div id="header"> |
| <img src="https://shardingsphere.apache.org/elasticjob/current/img/elasticjob.png" /> |
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| </div> |
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| </div> |
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| <div class="highlightable"> |
| <ul class="topics"> |
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| <li data-nav-id="/cn/overview/" title="概览" class="dd-item |
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| <a href="https://shardingsphere.apache.org/elasticjob/current/cn/overview/"> |
| <i class="collapse" style="display:inline; font-family:'courier';"> |
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| </i> |
| <b>1. </b>概览 |
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| </a> |
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| <li data-nav-id="/cn/quick-start/" title="快速入门" class="dd-item |
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| <a href="https://shardingsphere.apache.org/elasticjob/current/cn/quick-start/"> |
| <i class="collapse" style="display:inline; font-family:'courier';"> |
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| <svg class="icon icon-down" |
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| viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg" width="20" height="20" fill="#777"> |
| <path d="M500.8 604.778667L267.306667 371.392l-45.226667 45.269333 278.741333 278.613334 278.485334-278.613334-45.248-45.248z" p-id="5376" ></path> |
| </svg> |
| <svg class="icon icon-right" |
| style="display: inline-block;" |
| viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg" width="20" height="20" fill="#777"> |
| <path d="M593.450667 512.128L360.064 278.613333l45.290667-45.226666 278.613333 278.762666L405.333333 790.613333l-45.226666-45.269333z" p-id="5605" ></path> |
| </svg> |
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| </i> |
| <b>2. </b>快速入门 |
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| </a> |
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| <ul> |
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| <li data-nav-id="/cn/quick-start/elasticjob-lite/" title="ElasticJob-Lite" class="dd-item "> |
| <a href="https://shardingsphere.apache.org/elasticjob/current/cn/quick-start/elasticjob-lite/"> |
| <svg viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg" p-id="5375" width="20" height="20"></svg> |
| <b>2.1. </b>ElasticJob-Lite |
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| </a> |
| </li> |
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| <li data-nav-id="/cn/quick-start/elasticjob-cloud/" title="ElasticJob-Cloud" class="dd-item "> |
| <a href="https://shardingsphere.apache.org/elasticjob/current/cn/quick-start/elasticjob-cloud/"> |
| <svg viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg" p-id="5375" width="20" height="20"></svg> |
| <b>2.2. </b>ElasticJob-Cloud |
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| </a> |
| </li> |
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| </ul> |
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| </li> |
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| <li data-nav-id="/cn/features/" title="概念 & 功能" class="dd-item |
| parent |
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| <a href="https://shardingsphere.apache.org/elasticjob/current/cn/features/"> |
| <i class="collapse" style="display:inline; font-family:'courier';"> |
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| viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg" width="20" height="20" fill="#777"> |
| <path d="M500.8 604.778667L267.306667 371.392l-45.226667 45.269333 278.741333 278.613334 278.485334-278.613334-45.248-45.248z" p-id="5376" ></path> |
| </svg> |
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| viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg" width="20" height="20" fill="#777"> |
| <path d="M593.450667 512.128L360.064 278.613333l45.290667-45.226666 278.613333 278.762666L405.333333 790.613333l-45.226666-45.269333z" p-id="5605" ></path> |
| </svg> |
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| </i> |
| <b>3. </b>概念 & 功能 |
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| </a> |
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| <li data-nav-id="/cn/features/schedule-model/" title="调度模型" class="dd-item "> |
| <a href="https://shardingsphere.apache.org/elasticjob/current/cn/features/schedule-model/"> |
| <svg viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg" p-id="5375" width="20" height="20"></svg> |
| <b>3.1. </b>调度模型 |
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| </a> |
| </li> |
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| <li data-nav-id="/cn/features/elastic/" title="弹性调度" class="dd-item active"> |
| <a href="https://shardingsphere.apache.org/elasticjob/current/cn/features/elastic/"> |
| <svg viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg" p-id="5375" width="20" height="20"></svg> |
| <b>3.2. </b>弹性调度 |
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| </a> |
| </li> |
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| <li data-nav-id="/cn/features/resource/" title="资源分配" class="dd-item "> |
| <a href="https://shardingsphere.apache.org/elasticjob/current/cn/features/resource/"> |
| <svg viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg" p-id="5375" width="20" height="20"></svg> |
| <b>3.3. </b>资源分配 |
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| <li data-nav-id="/cn/features/failover/" title="失效转移" class="dd-item "> |
| <a href="https://shardingsphere.apache.org/elasticjob/current/cn/features/failover/"> |
| <svg viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg" p-id="5375" width="20" height="20"></svg> |
| <b>3.4. </b>失效转移 |
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| <li data-nav-id="/cn/features/misfire/" title="错过任务重执行" class="dd-item "> |
| <a href="https://shardingsphere.apache.org/elasticjob/current/cn/features/misfire/"> |
| <svg viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg" p-id="5375" width="20" height="20"></svg> |
| <b>3.5. </b>错过任务重执行 |
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| </a> |
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| <li data-nav-id="/cn/features/job-type/" title="作业开放生态" class="dd-item "> |
| <a href="https://shardingsphere.apache.org/elasticjob/current/cn/features/job-type/"> |
| <svg viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg" p-id="5375" width="20" height="20"></svg> |
| <b>3.6. </b>作业开放生态 |
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| <li data-nav-id="/cn/user-manual/" title="用户手册" class="dd-item |
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| <a href="https://shardingsphere.apache.org/elasticjob/current/cn/user-manual/"> |
| <i class="collapse" style="display:inline; font-family:'courier';"> |
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| viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg" width="20" height="20" fill="#777"> |
| <path d="M500.8 604.778667L267.306667 371.392l-45.226667 45.269333 278.741333 278.613334 278.485334-278.613334-45.248-45.248z" p-id="5376" ></path> |
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| <svg class="icon icon-right" |
| style="display: inline-block;" |
| viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg" width="20" height="20" fill="#777"> |
| <path d="M593.450667 512.128L360.064 278.613333l45.290667-45.226666 278.613333 278.762666L405.333333 790.613333l-45.226666-45.269333z" p-id="5605" ></path> |
| </svg> |
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| <b>4. </b>用户手册 |
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| </a> |
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| <li data-nav-id="/cn/user-manual/elasticjob-lite/" title="ElasticJob-Lite" class="dd-item |
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| <a href="https://shardingsphere.apache.org/elasticjob/current/cn/user-manual/elasticjob-lite/"> |
| <i class="collapse" style="display:inline; font-family:'courier';"> |
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| <svg class="icon icon-down" |
| style="display: none;" |
| viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg" width="20" height="20" fill="#777"> |
| <path d="M500.8 604.778667L267.306667 371.392l-45.226667 45.269333 278.741333 278.613334 278.485334-278.613334-45.248-45.248z" p-id="5376" ></path> |
| </svg> |
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| style="display: inline-block;" |
| viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg" width="20" height="20" fill="#777"> |
| <path d="M593.450667 512.128L360.064 278.613333l45.290667-45.226666 278.613333 278.762666L405.333333 790.613333l-45.226666-45.269333z" p-id="5605" ></path> |
| </svg> |
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| </i> |
| <b>4.1. </b>ElasticJob-Lite |
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| </a> |
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| <a href="https://shardingsphere.apache.org/elasticjob/current/cn/user-manual/elasticjob-lite/usage/"> |
| <i class="collapse" style="display:inline; font-family:'courier';"> |
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| viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg" width="20" height="20" fill="#777"> |
| <path d="M500.8 604.778667L267.306667 371.392l-45.226667 45.269333 278.741333 278.613334 278.485334-278.613334-45.248-45.248z" p-id="5376" ></path> |
| </svg> |
| <svg class="icon icon-right" |
| style="display: inline-block;" |
| viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg" width="20" height="20" fill="#777"> |
| <path d="M593.450667 512.128L360.064 278.613333l45.290667-45.226666 278.613333 278.762666L405.333333 790.613333l-45.226666-45.269333z" p-id="5605" ></path> |
| </svg> |
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| </i> |
| <b>4.1.1 </b>使用手册 |
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| </a> |
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| <li data-nav-id="/cn/user-manual/elasticjob-lite/usage/job-api/" title="作业 API" class="dd-item |
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| <a href="https://shardingsphere.apache.org/elasticjob/current/cn/user-manual/elasticjob-lite/usage/job-api/"> |
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| viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg" width="20" height="20" fill="#777"> |
| <path d="M500.8 604.778667L267.306667 371.392l-45.226667 45.269333 278.741333 278.613334 278.485334-278.613334-45.248-45.248z" p-id="5376" ></path> |
| </svg> |
| <svg class="icon icon-right" |
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| viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg" width="20" height="20" fill="#777"> |
| <path d="M593.450667 512.128L360.064 278.613333l45.290667-45.226666 278.613333 278.762666L405.333333 790.613333l-45.226666-45.269333z" p-id="5605" ></path> |
| </svg> |
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| 作业 API |
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| </a> |
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| <li data-nav-id="/cn/user-manual/elasticjob-lite/usage/job-api/job-interface/" title="作业开发" class="dd-item "> |
| <a href="https://shardingsphere.apache.org/elasticjob/current/cn/user-manual/elasticjob-lite/usage/job-api/job-interface/"> |
| <svg viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg" p-id="5375" width="20" height="20"></svg> |
| 作业开发 |
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| </a> |
| </li> |
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| <li data-nav-id="/cn/user-manual/elasticjob-lite/usage/job-api/java-api/" title="使用 Java API" class="dd-item "> |
| <a href="https://shardingsphere.apache.org/elasticjob/current/cn/user-manual/elasticjob-lite/usage/job-api/java-api/"> |
| <svg viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg" p-id="5375" width="20" height="20"></svg> |
| 使用 Java API |
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| </a> |
| </li> |
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| <li data-nav-id="/cn/user-manual/elasticjob-lite/usage/job-api/spring-boot-starter/" title="使用 Spring Boot Starter" class="dd-item "> |
| <a href="https://shardingsphere.apache.org/elasticjob/current/cn/user-manual/elasticjob-lite/usage/job-api/spring-boot-starter/"> |
| <svg viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg" p-id="5375" width="20" height="20"></svg> |
| 使用 Spring Boot Starter |
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| </a> |
| </li> |
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| <li data-nav-id="/cn/user-manual/elasticjob-lite/usage/job-api/spring-namespace/" title="使用 Spring 命名空间" class="dd-item "> |
| <a href="https://shardingsphere.apache.org/elasticjob/current/cn/user-manual/elasticjob-lite/usage/job-api/spring-namespace/"> |
| <svg viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg" p-id="5375" width="20" height="20"></svg> |
| 使用 Spring 命名空间 |
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| </a> |
| </li> |
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| </ul> |
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| <li data-nav-id="/cn/user-manual/elasticjob-lite/usage/job-listener/" title="作业监听器" class="dd-item |
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| "> |
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| <a href="https://shardingsphere.apache.org/elasticjob/current/cn/user-manual/elasticjob-lite/usage/job-listener/"> |
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| <svg class="icon icon-down" |
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| <path d="M500.8 604.778667L267.306667 371.392l-45.226667 45.269333 278.741333 278.613334 278.485334-278.613334-45.248-45.248z" p-id="5376" ></path> |
| </svg> |
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| <path d="M593.450667 512.128L360.064 278.613333l45.290667-45.226666 278.613333 278.762666L405.333333 790.613333l-45.226666-45.269333z" p-id="5605" ></path> |
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| 作业监听器 |
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| </a> |
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| <ul> |
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| <li data-nav-id="/cn/user-manual/elasticjob-lite/usage/job-listener/listener-interface/" title="监听器开发" class="dd-item "> |
| <a href="https://shardingsphere.apache.org/elasticjob/current/cn/user-manual/elasticjob-lite/usage/job-listener/listener-interface/"> |
| <svg viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg" p-id="5375" width="20" height="20"></svg> |
| 监听器开发 |
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| </a> |
| </li> |
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| <li data-nav-id="/cn/user-manual/elasticjob-lite/usage/job-listener/java-api/" title="使用 Java API" class="dd-item "> |
| <a href="https://shardingsphere.apache.org/elasticjob/current/cn/user-manual/elasticjob-lite/usage/job-listener/java-api/"> |
| <svg viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg" p-id="5375" width="20" height="20"></svg> |
| 使用 Java API |
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| </li> |
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| <li data-nav-id="/cn/user-manual/elasticjob-lite/usage/job-listener/spring-namespace/" title="使用 Spring 命名空间" class="dd-item "> |
| <a href="https://shardingsphere.apache.org/elasticjob/current/cn/user-manual/elasticjob-lite/usage/job-listener/spring-namespace/"> |
| <svg viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg" p-id="5375" width="20" height="20"></svg> |
| 使用 Spring 命名空间 |
| |
| </a> |
| </li> |
| |
| |
| |
| |
| |
| |
| |
| </ul> |
| |
| </li> |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| <li data-nav-id="/cn/user-manual/elasticjob-lite/usage/tracing/" title="事件追踪" class="dd-item |
| |
| |
| |
| "> |
| |
| <a href="https://shardingsphere.apache.org/elasticjob/current/cn/user-manual/elasticjob-lite/usage/tracing/"> |
| <i class="collapse" style="display:inline; font-family:'courier';"> |
| |
| <svg class="icon icon-down" |
| style="display: none;" |
| viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg" width="20" height="20" fill="#777"> |
| <path d="M500.8 604.778667L267.306667 371.392l-45.226667 45.269333 278.741333 278.613334 278.485334-278.613334-45.248-45.248z" p-id="5376" ></path> |
| </svg> |
| <svg class="icon icon-right" |
| style="display: inline-block;" |
| viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg" width="20" height="20" fill="#777"> |
| <path d="M593.450667 512.128L360.064 278.613333l45.290667-45.226666 278.613333 278.762666L405.333333 790.613333l-45.226666-45.269333z" p-id="5605" ></path> |
| </svg> |
| |
| </i> |
| 事件追踪 |
| |
| </a> |
| |
| |
| <ul> |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| <li data-nav-id="/cn/user-manual/elasticjob-lite/usage/tracing/java-api/" title="使用 Java API" class="dd-item "> |
| <a href="https://shardingsphere.apache.org/elasticjob/current/cn/user-manual/elasticjob-lite/usage/tracing/java-api/"> |
| <svg viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg" p-id="5375" width="20" height="20"></svg> |
| 使用 Java API |
| |
| </a> |
| </li> |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| <li data-nav-id="/cn/user-manual/elasticjob-lite/usage/tracing/spring-boot-starter/" title="使用 Spring Boot Starter" class="dd-item "> |
| <a href="https://shardingsphere.apache.org/elasticjob/current/cn/user-manual/elasticjob-lite/usage/tracing/spring-boot-starter/"> |
| <svg viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg" p-id="5375" width="20" height="20"></svg> |
| 使用 Spring Boot Starter |
| |
| </a> |
| </li> |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| <li data-nav-id="/cn/user-manual/elasticjob-lite/usage/tracing/spring-namespace/" title="使用 Spring 命名空间" class="dd-item "> |
| <a href="https://shardingsphere.apache.org/elasticjob/current/cn/user-manual/elasticjob-lite/usage/tracing/spring-namespace/"> |
| <svg viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg" p-id="5375" width="20" height="20"></svg> |
| 使用 Spring 命名空间 |
| |
| </a> |
| </li> |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| <li data-nav-id="/cn/user-manual/elasticjob-lite/usage/tracing/table-structure/" title="表结构说明" class="dd-item "> |
| <a href="https://shardingsphere.apache.org/elasticjob/current/cn/user-manual/elasticjob-lite/usage/tracing/table-structure/"> |
| <svg viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg" p-id="5375" width="20" height="20"></svg> |
| 表结构说明 |
| |
| </a> |
| </li> |
| |
| |
| |
| |
| |
| |
| |
| </ul> |
| |
| </li> |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| <li data-nav-id="/cn/user-manual/elasticjob-lite/usage/operation-api/" title="操作 API" class="dd-item |
| |
| |
| |
| "> |
| |
| <a href="https://shardingsphere.apache.org/elasticjob/current/cn/user-manual/elasticjob-lite/usage/operation-api/"> |
| <i class="collapse" style="display:inline; font-family:'courier';"> |
| |
| <svg viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg" p-id="5375" width="20" height="20"></svg> |
| |
| </i> |
| 操作 API |
| |
| </a> |
| |
| |
| </li> |
| |
| |
| |
| |
| |
| |
| </ul> |
| |
| </li> |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| <li data-nav-id="/cn/user-manual/elasticjob-lite/configuration/" title="配置手册" class="dd-item |
| |
| |
| |
| "> |
| |
| <a href="https://shardingsphere.apache.org/elasticjob/current/cn/user-manual/elasticjob-lite/configuration/"> |
| <i class="collapse" style="display:inline; font-family:'courier';"> |
| |
| <svg class="icon icon-down" |
| style="display: none;" |
| viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg" width="20" height="20" fill="#777"> |
| <path d="M500.8 604.778667L267.306667 371.392l-45.226667 45.269333 278.741333 278.613334 278.485334-278.613334-45.248-45.248z" p-id="5376" ></path> |
| </svg> |
| <svg class="icon icon-right" |
| style="display: inline-block;" |
| viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg" width="20" height="20" fill="#777"> |
| <path d="M593.450667 512.128L360.064 278.613333l45.290667-45.226666 278.613333 278.762666L405.333333 790.613333l-45.226666-45.269333z" p-id="5605" ></path> |
| </svg> |
| |
| </i> |
| <b>4.1.2 </b>配置手册 |
| |
| </a> |
| |
| |
| <ul> |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| <li data-nav-id="/cn/user-manual/elasticjob-lite/configuration/java-api/" title="Java API" class="dd-item "> |
| <a href="https://shardingsphere.apache.org/elasticjob/current/cn/user-manual/elasticjob-lite/configuration/java-api/"> |
| <svg viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg" p-id="5375" width="20" height="20"></svg> |
| Java API |
| |
| </a> |
| </li> |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| <li data-nav-id="/cn/user-manual/elasticjob-lite/configuration/spring-boot-starter/" title="Spring Boot Starter" class="dd-item "> |
| <a href="https://shardingsphere.apache.org/elasticjob/current/cn/user-manual/elasticjob-lite/configuration/spring-boot-starter/"> |
| <svg viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg" p-id="5375" width="20" height="20"></svg> |
| Spring Boot Starter |
| |
| </a> |
| </li> |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| <li data-nav-id="/cn/user-manual/elasticjob-lite/configuration/spring-namespace/" title="Spring 命名空间" class="dd-item "> |
| <a href="https://shardingsphere.apache.org/elasticjob/current/cn/user-manual/elasticjob-lite/configuration/spring-namespace/"> |
| <svg viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg" p-id="5375" width="20" height="20"></svg> |
| Spring 命名空间 |
| |
| </a> |
| </li> |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| <li data-nav-id="/cn/user-manual/elasticjob-lite/configuration/built-in-strategy/" title="内置策略" class="dd-item |
| |
| |
| |
| "> |
| |
| <a href="https://shardingsphere.apache.org/elasticjob/current/cn/user-manual/elasticjob-lite/configuration/built-in-strategy/"> |
| <i class="collapse" style="display:inline; font-family:'courier';"> |
| |
| <svg class="icon icon-down" |
| style="display: none;" |
| viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg" width="20" height="20" fill="#777"> |
| <path d="M500.8 604.778667L267.306667 371.392l-45.226667 45.269333 278.741333 278.613334 278.485334-278.613334-45.248-45.248z" p-id="5376" ></path> |
| </svg> |
| <svg class="icon icon-right" |
| style="display: inline-block;" |
| viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg" width="20" height="20" fill="#777"> |
| <path d="M593.450667 512.128L360.064 278.613333l45.290667-45.226666 278.613333 278.762666L405.333333 790.613333l-45.226666-45.269333z" p-id="5605" ></path> |
| </svg> |
| |
| </i> |
| 内置策略 |
| |
| </a> |
| |
| |
| <ul> |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| <li data-nav-id="/cn/user-manual/elasticjob-lite/configuration/built-in-strategy/sharding/" title="作业分片策略" class="dd-item "> |
| <a href="https://shardingsphere.apache.org/elasticjob/current/cn/user-manual/elasticjob-lite/configuration/built-in-strategy/sharding/"> |
| <svg viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg" p-id="5375" width="20" height="20"></svg> |
| 作业分片策略 |
| |
| </a> |
| </li> |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| <li data-nav-id="/cn/user-manual/elasticjob-lite/configuration/built-in-strategy/thread-pool/" title="线程池策略" class="dd-item "> |
| <a href="https://shardingsphere.apache.org/elasticjob/current/cn/user-manual/elasticjob-lite/configuration/built-in-strategy/thread-pool/"> |
| <svg viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg" p-id="5375" width="20" height="20"></svg> |
| 线程池策略 |
| |
| </a> |
| </li> |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| <li data-nav-id="/cn/user-manual/elasticjob-lite/configuration/built-in-strategy/error-handler/" title="错误处理策略" class="dd-item "> |
| <a href="https://shardingsphere.apache.org/elasticjob/current/cn/user-manual/elasticjob-lite/configuration/built-in-strategy/error-handler/"> |
| <svg viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg" p-id="5375" width="20" height="20"></svg> |
| 错误处理策略 |
| |
| </a> |
| </li> |
| |
| |
| |
| |
| |
| |
| |
| </ul> |
| |
| </li> |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| <li data-nav-id="/cn/user-manual/elasticjob-lite/configuration/props/" title="作业属性配置" class="dd-item "> |
| <a href="https://shardingsphere.apache.org/elasticjob/current/cn/user-manual/elasticjob-lite/configuration/props/"> |
| <svg viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg" p-id="5375" width="20" height="20"></svg> |
| 作业属性配置 |
| |
| </a> |
| </li> |
| |
| |
| |
| |
| |
| |
| |
| </ul> |
| |
| </li> |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| <li data-nav-id="/cn/user-manual/elasticjob-lite/operation/" title="运维手册" class="dd-item |
| |
| |
| |
| "> |
| |
| <a href="https://shardingsphere.apache.org/elasticjob/current/cn/user-manual/elasticjob-lite/operation/"> |
| <i class="collapse" style="display:inline; font-family:'courier';"> |
| |
| <svg class="icon icon-down" |
| style="display: none;" |
| viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg" width="20" height="20" fill="#777"> |
| <path d="M500.8 604.778667L267.306667 371.392l-45.226667 45.269333 278.741333 278.613334 278.485334-278.613334-45.248-45.248z" p-id="5376" ></path> |
| </svg> |
| <svg class="icon icon-right" |
| style="display: inline-block;" |
| viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg" width="20" height="20" fill="#777"> |
| <path d="M593.450667 512.128L360.064 278.613333l45.290667-45.226666 278.613333 278.762666L405.333333 790.613333l-45.226666-45.269333z" p-id="5605" ></path> |
| </svg> |
| |
| </i> |
| <b>4.1.3 </b>运维手册 |
| |
| </a> |
| |
| |
| <ul> |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| <li data-nav-id="/cn/user-manual/elasticjob-lite/operation/deploy-guide/" title="部署指南" class="dd-item "> |
| <a href="https://shardingsphere.apache.org/elasticjob/current/cn/user-manual/elasticjob-lite/operation/deploy-guide/"> |
| <svg viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg" p-id="5375" width="20" height="20"></svg> |
| 部署指南 |
| |
| </a> |
| </li> |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| <li data-nav-id="/cn/user-manual/elasticjob-lite/operation/dump/" title="导出作业信息" class="dd-item "> |
| <a href="https://shardingsphere.apache.org/elasticjob/current/cn/user-manual/elasticjob-lite/operation/dump/"> |
| <svg viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg" p-id="5375" width="20" height="20"></svg> |
| 导出作业信息 |
| |
| </a> |
| </li> |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| <li data-nav-id="/cn/user-manual/elasticjob-lite/operation/execution-monitor/" title="作业运行状态监控" class="dd-item "> |
| <a href="https://shardingsphere.apache.org/elasticjob/current/cn/user-manual/elasticjob-lite/operation/execution-monitor/"> |
| <svg viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg" p-id="5375" width="20" height="20"></svg> |
| 作业运行状态监控 |
| |
| </a> |
| </li> |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| <li data-nav-id="/cn/user-manual/elasticjob-lite/operation/web-console/" title="运维平台" class="dd-item "> |
| <a href="https://shardingsphere.apache.org/elasticjob/current/cn/user-manual/elasticjob-lite/operation/web-console/"> |
| <svg viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg" p-id="5375" width="20" height="20"></svg> |
| 运维平台 |
| |
| </a> |
| </li> |
| |
| |
| |
| |
| |
| |
| |
| </ul> |
| |
| </li> |
| |
| |
| |
| |
| |
| |
| </ul> |
| |
| </li> |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| <li data-nav-id="/cn/user-manual/elasticjob-cloud/" title="ElasticJob-Cloud" class="dd-item |
| |
| |
| |
| "> |
| |
| <a href="https://shardingsphere.apache.org/elasticjob/current/cn/user-manual/elasticjob-cloud/"> |
| <i class="collapse" style="display:inline; font-family:'courier';"> |
| |
| <svg class="icon icon-down" |
| style="display: none;" |
| viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg" width="20" height="20" fill="#777"> |
| <path d="M500.8 604.778667L267.306667 371.392l-45.226667 45.269333 278.741333 278.613334 278.485334-278.613334-45.248-45.248z" p-id="5376" ></path> |
| </svg> |
| <svg class="icon icon-right" |
| style="display: inline-block;" |
| viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg" width="20" height="20" fill="#777"> |
| <path d="M593.450667 512.128L360.064 278.613333l45.290667-45.226666 278.613333 278.762666L405.333333 790.613333l-45.226666-45.269333z" p-id="5605" ></path> |
| </svg> |
| |
| </i> |
| <b>4.2. </b>ElasticJob-Cloud |
| |
| </a> |
| |
| |
| <ul> |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| <li data-nav-id="/cn/user-manual/elasticjob-cloud/usage/" title="使用手册" class="dd-item |
| |
| |
| |
| "> |
| |
| <a href="https://shardingsphere.apache.org/elasticjob/current/cn/user-manual/elasticjob-cloud/usage/"> |
| <i class="collapse" style="display:inline; font-family:'courier';"> |
| |
| <svg class="icon icon-down" |
| style="display: none;" |
| viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg" width="20" height="20" fill="#777"> |
| <path d="M500.8 604.778667L267.306667 371.392l-45.226667 45.269333 278.741333 278.613334 278.485334-278.613334-45.248-45.248z" p-id="5376" ></path> |
| </svg> |
| <svg class="icon icon-right" |
| style="display: inline-block;" |
| viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg" width="20" height="20" fill="#777"> |
| <path d="M593.450667 512.128L360.064 278.613333l45.290667-45.226666 278.613333 278.762666L405.333333 790.613333l-45.226666-45.269333z" p-id="5605" ></path> |
| </svg> |
| |
| </i> |
| <b>4.2.1. </b>使用手册 |
| |
| </a> |
| |
| |
| <ul> |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| <li data-nav-id="/cn/user-manual/elasticjob-cloud/usage/dev-guide/" title="开发指南" class="dd-item "> |
| <a href="https://shardingsphere.apache.org/elasticjob/current/cn/user-manual/elasticjob-cloud/usage/dev-guide/"> |
| <svg viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg" p-id="5375" width="20" height="20"></svg> |
| 开发指南 |
| |
| </a> |
| </li> |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| <li data-nav-id="/cn/user-manual/elasticjob-cloud/usage/local-executor/" title="本地运行模式" class="dd-item "> |
| <a href="https://shardingsphere.apache.org/elasticjob/current/cn/user-manual/elasticjob-cloud/usage/local-executor/"> |
| <svg viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg" p-id="5375" width="20" height="20"></svg> |
| 本地运行模式 |
| |
| </a> |
| </li> |
| |
| |
| |
| |
| |
| |
| |
| </ul> |
| |
| </li> |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| <li data-nav-id="/cn/user-manual/elasticjob-cloud/configuration/" title="配置手册" class="dd-item |
| |
| |
| |
| "> |
| |
| <a href="https://shardingsphere.apache.org/elasticjob/current/cn/user-manual/elasticjob-cloud/configuration/"> |
| <i class="collapse" style="display:inline; font-family:'courier';"> |
| |
| <svg viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg" p-id="5375" width="20" height="20"></svg> |
| |
| </i> |
| <b>4.2.2. </b>配置手册 |
| |
| </a> |
| |
| |
| </li> |
| |
| |
| |
| |
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| <b>5.3. </b>错误处理策略 |
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| <b>5.4. </b>作业类名称提供策略 |
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| <b>5.5. </b>线路规划 |
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| <b>6. </b>下载 |
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| <b>7. </b>采用公司 |
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| <b>8. </b>FAQ |
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| <b>9. </b>博客 |
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| <i class="fa fa-fw fa-file-pdf-o" ></i> 下载PDF文档 |
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| <a href='https://shardingsphere.apache.org/elasticjob/current/cn/'>ElasticJob</a> > <a href='https://shardingsphere.apache.org/elasticjob/current/cn/features/'>概念 & 功能</a> > 弹性调度 |
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| <nav id="TableOfContents"> |
| <ul> |
| <li><a href="#分片">分片</a> |
| <ul> |
| <li><a href="#分片项">分片项</a></li> |
| <li><a href="#个性化分片参数">个性化分片参数</a></li> |
| </ul> |
| </li> |
| <li><a href="#资源最大限度利用">资源最大限度利用</a></li> |
| <li><a href="#高可用">高可用</a></li> |
| <li><a href="#elasticjob-lite-实现原理">ElasticJob-Lite 实现原理</a> |
| <ul> |
| <li><a href="#弹性分布式实现">弹性分布式实现</a></li> |
| <li><a href="#注册中心数据结构">注册中心数据结构</a></li> |
| <li><a href="#config-节点">config 节点</a></li> |
| <li><a href="#instances-节点">instances 节点</a></li> |
| <li><a href="#sharding-节点">sharding 节点</a></li> |
| <li><a href="#servers-节点">servers 节点</a></li> |
| <li><a href="#leader-节点">leader 节点</a></li> |
| <li><a href="#流程图">流程图</a></li> |
| </ul> |
| </li> |
| </ul> |
| </nav> |
| |
| <p>弹性调度是 ElasticJob 最重要的功能，也是这款产品名称的由来。 |
| 它是一款能够让任务通过分片进行水平扩展的任务处理系统。</p> |
| <h2 id="分片">分片</h2> |
| <p>ElasticJob 中任务分片项的概念，使得任务可以在分布式的环境下运行，每台任务服务器只运行分配给该服务器的分片。 |
| 随着服务器的增加或宕机，ElasticJob 会近乎实时的感知服务器数量的变更，从而重新为分布式的任务服务器分配更加合理的任务分片项，使得任务可以随着资源的增加而提升效率。</p> |
| <p>任务的分布式执行，需要将一个任务拆分为多个独立的任务项，然后由分布式的服务器分别执行某一个或几个分片项。</p> |
| <p>举例说明，如果作业分为 4 片，用两台服务器执行，则每个服务器分到 2 片，分别负责作业的 50% 的负载，如下图所示。</p> |
| <p><img src="https://shardingsphere.apache.org/elasticjob/current/img/elastic/sharding.png" alt="分片作业"></p> |
| <h3 id="分片项">分片项</h3> |
| <p>ElasticJob 并不直接提供数据处理的功能，而是将分片项分配至各个运行中的作业服务器，开发者需要自行处理分片项与业务的对应关系。 |
| 分片项为数字，始于 0 而终于分片总数减 1。</p> |
| <h3 id="个性化分片参数">个性化分片参数</h3> |
| <p>个性化参数可以和分片项匹配对应关系，用于将分片项的数字转换为更加可读的业务代码。</p> |
| <p>例如：按照地区水平拆分数据库，数据库 A 是北京的数据；数据库 B 是上海的数据；数据库 C 是广州的数据。 |
| 如果仅按照分片项配置，开发者需要了解 0 表示北京；1 表示上海；2 表示广州。 |
| 合理使用个性化参数可以让代码更可读，如果配置为 0=北京,1=上海,2=广州，那么代码中直接使用北京，上海，广州的枚举值即可完成分片项和业务逻辑的对应关系。</p> |
| <h2 id="资源最大限度利用">资源最大限度利用</h2> |
| <p>ElasticJob 提供最灵活的方式，最大限度的提高执行作业的吞吐量。 |
| 当新增加作业服务器时，ElasticJob 会通过注册中心的临时节点的变化感知到新服务器的存在，并在下次任务调度的时候重新分片，新的服务器会承载一部分作业分片，如下图所示。</p> |
| <p><img src="https://shardingsphere.apache.org/elasticjob/current/img/elastic/sacle-out.png" alt="作业扩容"></p> |
| <p>将分片项设置为大于服务器的数量，最好是大于服务器倍数的数量，作业将会合理的利用分布式资源，动态的分配分片项。</p> |
| <p>例如：3 台服务器，分成 10 片，则分片项分配结果为服务器 A = 0,1,2；服务器 B = 3,4,5；服务器 C = 6,7,8,9。 |
| 如果服务器 C 崩溃，则分片项分配结果为服务器 A = 0,1,2,3,4; 服务器 B = 5,6,7,8,9。 |
| 在不丢失分片项的情况下，最大限度的利用现有资源提高吞吐量。</p> |
| <h2 id="高可用">高可用</h2> |
| <p>当作业服务器在运行中宕机时，注册中心同样会通过临时节点感知，并将在下次运行时将分片转移至仍存活的服务器，以达到作业高可用的效果。 |
| 本次由于服务器宕机而未执行完的作业，则可以通过失效转移的方式继续执行。如下图所示。</p> |
| <p><img src="https://shardingsphere.apache.org/elasticjob/current/img/elastic/ha.png" alt="作业高可用"></p> |
| <p>将分片总数设置为 1，并使用多于 1 台的服务器执行作业，作业将会以 1 主 n 从的方式执行。 |
| 一旦执行作业的服务器宕机，等待执行的服务器将会在下次作业启动时替补执行。开启失效转移功能效果更好，可以保证在本次作业在执行时宕机的情况下，备机立即启动替补执行。</p> |
| <h2 id="elasticjob-lite-实现原理">ElasticJob-Lite 实现原理</h2> |
| <p>ElasticJob-Lite 并无作业调度中心节点，而是基于部署作业框架的程序在到达相应时间点时各自触发调度。 |
| 注册中心仅用于作业注册和监控信息存储。而主作业节点仅用于处理分片和清理等功能。</p> |
| <h3 id="弹性分布式实现">弹性分布式实现</h3> |
| <ul> |
| <li>第一台服务器上线触发主服务器选举。主服务器一旦下线，则重新触发选举，选举过程中阻塞，只有主服务器选举完成，才会执行其他任务。</li> |
| <li>某作业服务器上线时会自动将服务器信息注册到注册中心，下线时会自动更新服务器状态。</li> |
| <li>主节点选举，服务器上下线，分片总数变更均更新重新分片标记。</li> |
| <li>定时任务触发时，如需重新分片，则通过主服务器分片，分片过程中阻塞，分片结束后才可执行任务。如分片过程中主服务器下线，则先选举主服务器，再分片。</li> |
| <li>通过上一项说明可知，为了维持作业运行时的稳定性，运行过程中只会标记分片状态，不会重新分片。分片仅可能发生在下次任务触发前。</li> |
| <li>每次分片都会按服务器IP排序，保证分片结果不会产生较大波动。</li> |
| <li>实现失效转移功能，在某台服务器执行完毕后主动抓取未分配的分片，并且在某台服务器下线后主动寻找可用的服务器执行任务。</li> |
| </ul> |
| <h3 id="注册中心数据结构">注册中心数据结构</h3> |
| <p>注册中心在定义的命名空间下，创建作业名称节点，用于区分不同作业，所以作业一旦创建则不能修改作业名称，如果修改名称将视为新的作业。 |
| 作业名称节点下又包含4个数据子节点，分别是 config, instances, sharding, servers 和 leader。</p> |
| <h3 id="config-节点">config 节点</h3> |
| <p>作业配置信息，以 YAML 格式存储。</p> |
| <h3 id="instances-节点">instances 节点</h3> |
| <p>作业运行实例信息，子节点是当前作业运行实例的主键。 |
| 作业运行实例主键由作业运行服务器的 IP 地址和 PID 构成。 |
| 作业运行实例主键均为临时节点，当作业实例上线时注册，下线时自动清理。注册中心监控这些节点的变化来协调分布式作业的分片以及高可用。 |
| 可在作业运行实例节点写入 TRIGGER 表示该实例立即执行一次。</p> |
| <h3 id="sharding-节点">sharding 节点</h3> |
| <p>作业分片信息，子节点是分片项序号，从零开始，至分片总数减一。 |
| 分片项序号的子节点存储详细信息。每个分片项下的子节点用于控制和记录分片运行状态。 |
| 节点详细信息说明：</p> |
| <table> |
| <thead> |
| <tr> |
| <th>子节点名</th> |
| <th align="left">临时节点</th> |
| <th align="left">描述</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr> |
| <td>instance</td> |
| <td align="left">否</td> |
| <td align="left">执行该分片项的作业运行实例主键</td> |
| </tr> |
| <tr> |
| <td>running</td> |
| <td align="left">是</td> |
| <td align="left">分片项正在运行的状态<br />仅配置 monitorExecution 时有效</td> |
| </tr> |
| <tr> |
| <td>failover</td> |
| <td align="left">是</td> |
| <td align="left">如果该分片项被失效转移分配给其他作业服务器，则此节点值记录执行此分片的作业服务器 IP</td> |
| </tr> |
| <tr> |
| <td>misfire</td> |
| <td align="left">否</td> |
| <td align="left">是否开启错过任务重新执行</td> |
| </tr> |
| <tr> |
| <td>disabled</td> |
| <td align="left">否</td> |
| <td align="left">是否禁用此分片项</td> |
| </tr> |
| </tbody> |
| </table> |
| <h3 id="servers-节点">servers 节点</h3> |
| <p>作业服务器信息，子节点是作业服务器的 IP 地址。 |
| 可在 IP 地址节点写入 DISABLED 表示该服务器禁用。 |
| 在新的云原生架构下，servers 节点大幅弱化，仅包含控制服务器是否可以禁用这一功能。 |
| 为了更加纯粹的实现作业核心，servers 功能未来可能删除，控制服务器是否禁用的能力应该下放至自动化部署系统。</p> |
| <h3 id="leader-节点">leader 节点</h3> |
| <p>作业服务器主节点信息，分为 election，sharding 和 failover 三个子节点。 |
| 分别用于主节点选举，分片和失效转移处理。</p> |
| <p>leader节点是内部使用的节点，如果对作业框架原理不感兴趣，可不关注此节点。</p> |
| <table> |
| <thead> |
| <tr> |
| <th>子节点名</th> |
| <th align="left">临时节点</th> |
| <th align="left">描述</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr> |
| <td>election\instance</td> |
| <td align="left">是</td> |
| <td align="left">主节点服务器IP地址<br />一旦该节点被删除将会触发重新选举<br />重新选举的过程中一切主节点相关的操作都将阻塞</td> |
| </tr> |
| <tr> |
| <td>election\latch</td> |
| <td align="left">否</td> |
| <td align="left">主节点选举的分布式锁<br />为 curator 的分布式锁使用</td> |
| </tr> |
| <tr> |
| <td>sharding\necessary</td> |
| <td align="left">否</td> |
| <td align="left">是否需要重新分片的标记<br />如果分片总数变化，或作业服务器节点上下线或启用/禁用，以及主节点选举，会触发设置重分片标记<br />作业在下次执行时使用主节点重新分片，且中间不会被打断<br />作业执行时不会触发分片</td> |
| </tr> |
| <tr> |
| <td>sharding\processing</td> |
| <td align="left">是</td> |
| <td align="left">主节点在分片时持有的节点<br />如果有此节点，所有的作业执行都将阻塞，直至分片结束<br />主节点分片结束或主节点崩溃会删除此临时节点</td> |
| </tr> |
| <tr> |
| <td>failover\items\分片项</td> |
| <td align="left">否</td> |
| <td align="left">一旦有作业崩溃，则会向此节点记录<br />当有空闲作业服务器时，会从此节点抓取需失效转移的作业项</td> |
| </tr> |
| <tr> |
| <td>failover\items\latch</td> |
| <td align="left">否</td> |
| <td align="left">分配失效转移分片项时占用的分布式锁<br />为 curator 的分布式锁使用</td> |
| </tr> |
| </tbody> |
| </table> |
| <h3 id="流程图">流程图</h3> |
| <h4 id="作业启动">作业启动</h4> |
| <p><img src="https://shardingsphere.apache.org/elasticjob/current/img/principles/job_start.jpg" alt="作业启动"></p> |
| <h4 id="作业执行">作业执行</h4> |
| <p><img src="https://shardingsphere.apache.org/elasticjob/current/img/principles/job_exec.jpg" alt="作业执行"></p> |
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