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正在初始化搜索引擎
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简介
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操作系统
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计算机网络
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数据库
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开发语言
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系统设计
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</a>
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</li>
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<li class="md-nav__item">
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<a href="../tcp/" class="md-nav__link">
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<span class="md-ellipsis">
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tcp
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</span>
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</a>
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</li>
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<li class="md-nav__item">
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<a href="../http/" class="md-nav__link">
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<span class="md-ellipsis">
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http
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</span>
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</a>
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</li>
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<li class="md-nav__item">
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<a href="../cache/" class="md-nav__link">
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<span class="md-ellipsis">
|
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缓存
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</span>
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</a>
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</li>
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<li class="md-nav__item">
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<a href="../nginx/" class="md-nav__link">
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<span class="md-ellipsis">
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nginx
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</span>
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</a>
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</li>
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<li class="md-nav__item">
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<a href="../queue/" class="md-nav__link">
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<span class="md-ellipsis">
|
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消息队列
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</span>
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</a>
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</li>
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<li class="md-nav__item">
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<a href="../io/" class="md-nav__link">
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<span class="md-ellipsis">
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IO
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</span>
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</a>
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</li>
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<li class="md-nav__item">
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<a href="../protobuf/" class="md-nav__link">
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<span class="md-ellipsis">
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protobuf
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</span>
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</a>
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</li>
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<li class="md-nav__item">
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<a href="../go/" class="md-nav__link">
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<span class="md-ellipsis">
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go
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</span>
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</a>
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</li>
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<li class="md-nav__item">
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<a href="../dist/" class="md-nav__link">
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<span class="md-ellipsis">
|
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|
分布式
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</span>
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</a>
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</li>
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<li class="md-nav__item md-nav__item--active">
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<input class="md-nav__toggle md-toggle" type="checkbox" id="__toc">
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<label class="md-nav__link md-nav__link--active" for="__toc">
|
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<span class="md-ellipsis">
|
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Elasticsearch
|
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</span>
|
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|
|
<span class="md-nav__icon md-icon"></span>
|
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</label>
|
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<a href="./" class="md-nav__link md-nav__link--active">
|
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<span class="md-ellipsis">
|
|
|
Elasticsearch
|
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</span>
|
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|
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</a>
|
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<nav class="md-nav md-nav--secondary" aria-label="目录">
|
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<label class="md-nav__title" for="__toc">
|
|
|
<span class="md-nav__icon md-icon"></span>
|
|
|
目录
|
|
|
</label>
|
|
|
<ul class="md-nav__list" data-md-component="toc" data-md-scrollfix>
|
|
|
|
|
|
<li class="md-nav__item">
|
|
|
<a href="#elasticsearch_1" class="md-nav__link">
|
|
|
什么是ElasticSearch?
|
|
|
</a>
|
|
|
|
|
|
</li>
|
|
|
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|
|
<li class="md-nav__item">
|
|
|
<a href="#es" class="md-nav__link">
|
|
|
ES有哪些节点类型？
|
|
|
</a>
|
|
|
|
|
|
<nav class="md-nav" aria-label="ES有哪些节点类型？">
|
|
|
<ul class="md-nav__list">
|
|
|
|
|
|
<li class="md-nav__item">
|
|
|
<a href="#_1" class="md-nav__link">
|
|
|
节点类型
|
|
|
</a>
|
|
|
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|
|
</li>
|
|
|
|
|
|
</ul>
|
|
|
</nav>
|
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|
|
</li>
|
|
|
|
|
|
<li class="md-nav__item">
|
|
|
<a href="#es_1" class="md-nav__link">
|
|
|
为什么说ES是准实时的？
|
|
|
</a>
|
|
|
|
|
|
</li>
|
|
|
|
|
|
<li class="md-nav__item">
|
|
|
<a href="#es_2" class="md-nav__link">
|
|
|
怎么解决ES深度分页问题？
|
|
|
</a>
|
|
|
|
|
|
</li>
|
|
|
|
|
|
<li class="md-nav__item">
|
|
|
<a href="#doc-values" class="md-nav__link">
|
|
|
doc values为了解决什么？
|
|
|
</a>
|
|
|
|
|
|
</li>
|
|
|
|
|
|
<li class="md-nav__item">
|
|
|
<a href="#es_3" class="md-nav__link">
|
|
|
ES中副本分片的目的是做什么？
|
|
|
</a>
|
|
|
|
|
|
</li>
|
|
|
|
|
|
<li class="md-nav__item">
|
|
|
<a href="#_2" class="md-nav__link">
|
|
|
怎样在不停机情况下，进行索引重建？
|
|
|
</a>
|
|
|
|
|
|
</li>
|
|
|
|
|
|
<li class="md-nav__item">
|
|
|
<a href="#es_4" class="md-nav__link">
|
|
|
ES数据建模有哪些模式？
|
|
|
</a>
|
|
|
|
|
|
<nav class="md-nav" aria-label="ES数据建模有哪些模式？">
|
|
|
<ul class="md-nav__list">
|
|
|
|
|
|
<li class="md-nav__item">
|
|
|
<a href="#_3" class="md-nav__link">
|
|
|
应用层联接
|
|
|
</a>
|
|
|
|
|
|
</li>
|
|
|
|
|
|
<li class="md-nav__item">
|
|
|
<a href="#_4" class="md-nav__link">
|
|
|
反范式设计
|
|
|
</a>
|
|
|
|
|
|
</li>
|
|
|
|
|
|
<li class="md-nav__item">
|
|
|
<a href="#_5" class="md-nav__link">
|
|
|
嵌套对象
|
|
|
</a>
|
|
|
|
|
|
</li>
|
|
|
|
|
|
<li class="md-nav__item">
|
|
|
<a href="#_6" class="md-nav__link">
|
|
|
父子文档
|
|
|
</a>
|
|
|
|
|
|
</li>
|
|
|
|
|
|
</ul>
|
|
|
</nav>
|
|
|
|
|
|
</li>
|
|
|
|
|
|
<li class="md-nav__item">
|
|
|
<a href="#es_5" class="md-nav__link">
|
|
|
ES索引生命周期管理是怎么回事？
|
|
|
</a>
|
|
|
|
|
|
<nav class="md-nav" aria-label="ES索引生命周期管理是怎么回事？">
|
|
|
<ul class="md-nav__list">
|
|
|
|
|
|
<li class="md-nav__item">
|
|
|
<a href="#_7" class="md-nav__link">
|
|
|
操作
|
|
|
</a>
|
|
|
|
|
|
<nav class="md-nav" aria-label="操作">
|
|
|
<ul class="md-nav__list">
|
|
|
|
|
|
<li class="md-nav__item">
|
|
|
<a href="#timing" class="md-nav__link">
|
|
|
timing
|
|
|
</a>
|
|
|
|
|
|
</li>
|
|
|
|
|
|
<li class="md-nav__item">
|
|
|
<a href="#hot-rollover" class="md-nav__link">
|
|
|
Hot Rollover
|
|
|
</a>
|
|
|
|
|
|
</li>
|
|
|
|
|
|
<li class="md-nav__item">
|
|
|
<a href="#warm-allocate" class="md-nav__link">
|
|
|
Warm Allocate
|
|
|
</a>
|
|
|
|
|
|
</li>
|
|
|
|
|
|
<li class="md-nav__item">
|
|
|
<a href="#warm-read-only" class="md-nav__link">
|
|
|
Warm Read-Only
|
|
|
</a>
|
|
|
|
|
|
</li>
|
|
|
|
|
|
<li class="md-nav__item">
|
|
|
<a href="#warm-force-merge" class="md-nav__link">
|
|
|
Warm Force-Merge
|
|
|
</a>
|
|
|
|
|
|
</li>
|
|
|
|
|
|
<li class="md-nav__item">
|
|
|
<a href="#warm-shrink" class="md-nav__link">
|
|
|
Warm Shrink
|
|
|
</a>
|
|
|
|
|
|
</li>
|
|
|
|
|
|
<li class="md-nav__item">
|
|
|
<a href="#cold-freeze" class="md-nav__link">
|
|
|
Cold Freeze
|
|
|
</a>
|
|
|
|
|
|
</li>
|
|
|
|
|
|
</ul>
|
|
|
</nav>
|
|
|
|
|
|
</li>
|
|
|
|
|
|
</ul>
|
|
|
</nav>
|
|
|
|
|
|
</li>
|
|
|
|
|
|
</ul>
|
|
|
|
|
|
</nav>
|
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|
|
</li>
|
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|
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|
|
<li class="md-nav__item">
|
|
|
<a href="../docker/" class="md-nav__link">
|
|
|
|
|
|
|
|
|
<span class="md-ellipsis">
|
|
|
docker
|
|
|
</span>
|
|
|
|
|
|
|
|
|
</a>
|
|
|
</li>
|
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|
<li class="md-nav__item">
|
|
|
<a href="../ref/" class="md-nav__link">
|
|
|
|
|
|
|
|
|
<span class="md-ellipsis">
|
|
|
参考资料
|
|
|
</span>
|
|
|
|
|
|
|
|
|
</a>
|
|
|
</li>
|
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|
</ul>
|
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|
</nav>
|
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|
</li>
|
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|
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|
|
</ul>
|
|
|
</nav>
|
|
|
</div>
|
|
|
</div>
|
|
|
</div>
|
|
|
|
|
|
|
|
|
|
|
|
<div class="md-sidebar md-sidebar--secondary" data-md-component="sidebar" data-md-type="toc" >
|
|
|
<div class="md-sidebar__scrollwrap">
|
|
|
<div class="md-sidebar__inner">
|
|
|
|
|
|
|
|
|
<nav class="md-nav md-nav--secondary" aria-label="目录">
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
<label class="md-nav__title" for="__toc">
|
|
|
<span class="md-nav__icon md-icon"></span>
|
|
|
目录
|
|
|
</label>
|
|
|
<ul class="md-nav__list" data-md-component="toc" data-md-scrollfix>
|
|
|
|
|
|
<li class="md-nav__item">
|
|
|
<a href="#elasticsearch_1" class="md-nav__link">
|
|
|
什么是ElasticSearch?
|
|
|
</a>
|
|
|
|
|
|
</li>
|
|
|
|
|
|
<li class="md-nav__item">
|
|
|
<a href="#es" class="md-nav__link">
|
|
|
ES有哪些节点类型？
|
|
|
</a>
|
|
|
|
|
|
<nav class="md-nav" aria-label="ES有哪些节点类型？">
|
|
|
<ul class="md-nav__list">
|
|
|
|
|
|
<li class="md-nav__item">
|
|
|
<a href="#_1" class="md-nav__link">
|
|
|
节点类型
|
|
|
</a>
|
|
|
|
|
|
</li>
|
|
|
|
|
|
</ul>
|
|
|
</nav>
|
|
|
|
|
|
</li>
|
|
|
|
|
|
<li class="md-nav__item">
|
|
|
<a href="#es_1" class="md-nav__link">
|
|
|
为什么说ES是准实时的？
|
|
|
</a>
|
|
|
|
|
|
</li>
|
|
|
|
|
|
<li class="md-nav__item">
|
|
|
<a href="#es_2" class="md-nav__link">
|
|
|
怎么解决ES深度分页问题？
|
|
|
</a>
|
|
|
|
|
|
</li>
|
|
|
|
|
|
<li class="md-nav__item">
|
|
|
<a href="#doc-values" class="md-nav__link">
|
|
|
doc values为了解决什么？
|
|
|
</a>
|
|
|
|
|
|
</li>
|
|
|
|
|
|
<li class="md-nav__item">
|
|
|
<a href="#es_3" class="md-nav__link">
|
|
|
ES中副本分片的目的是做什么？
|
|
|
</a>
|
|
|
|
|
|
</li>
|
|
|
|
|
|
<li class="md-nav__item">
|
|
|
<a href="#_2" class="md-nav__link">
|
|
|
怎样在不停机情况下，进行索引重建？
|
|
|
</a>
|
|
|
|
|
|
</li>
|
|
|
|
|
|
<li class="md-nav__item">
|
|
|
<a href="#es_4" class="md-nav__link">
|
|
|
ES数据建模有哪些模式？
|
|
|
</a>
|
|
|
|
|
|
<nav class="md-nav" aria-label="ES数据建模有哪些模式？">
|
|
|
<ul class="md-nav__list">
|
|
|
|
|
|
<li class="md-nav__item">
|
|
|
<a href="#_3" class="md-nav__link">
|
|
|
应用层联接
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</a>
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</li>
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<li class="md-nav__item">
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<a href="#_4" class="md-nav__link">
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反范式设计
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</a>
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</li>
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<li class="md-nav__item">
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<a href="#_5" class="md-nav__link">
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嵌套对象
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</a>
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</li>
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<li class="md-nav__item">
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<a href="#_6" class="md-nav__link">
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父子文档
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</a>
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</li>
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</ul>
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</nav>
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</li>
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<li class="md-nav__item">
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<a href="#es_5" class="md-nav__link">
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ES索引生命周期管理是怎么回事？
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</a>
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<nav class="md-nav" aria-label="ES索引生命周期管理是怎么回事？">
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<ul class="md-nav__list">
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<li class="md-nav__item">
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<a href="#_7" class="md-nav__link">
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操作
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</a>
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<nav class="md-nav" aria-label="操作">
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<ul class="md-nav__list">
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<li class="md-nav__item">
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<a href="#timing" class="md-nav__link">
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timing
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</a>
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</li>
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<li class="md-nav__item">
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<a href="#hot-rollover" class="md-nav__link">
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Hot Rollover
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</a>
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</li>
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<li class="md-nav__item">
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<a href="#warm-allocate" class="md-nav__link">
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Warm Allocate
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</a>
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</li>
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<li class="md-nav__item">
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<a href="#warm-read-only" class="md-nav__link">
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Warm Read-Only
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</a>
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</li>
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<li class="md-nav__item">
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<a href="#warm-force-merge" class="md-nav__link">
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Warm Force-Merge
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</a>
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</li>
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<li class="md-nav__item">
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<a href="#warm-shrink" class="md-nav__link">
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Warm Shrink
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</a>
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</li>
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<li class="md-nav__item">
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<a href="#cold-freeze" class="md-nav__link">
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Cold Freeze
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</a>
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</li>
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</ul>
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</nav>
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</li>
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</ul>
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</nav>
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</li>
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</ul>
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</nav>
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</div>
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</div>
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</div>
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<div class="md-content" data-md-component="content">
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<article class="md-content__inner md-typeset">
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<h1 id="elasticsearch">ElasticSearch<a class="headerlink" href="#elasticsearch" title="Permanent link">¶</a></h1>
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<h2 id="elasticsearch_1">什么是ElasticSearch?<a class="headerlink" href="#elasticsearch_1" title="Permanent link">¶</a></h2>
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<p>Elasticsearch是基于Apace Lunence构建的开源，分布式，具有高可用性和高拓展性的全文检索引擎。Elasticsearch具有开箱即用的特性，提供RESTful接口，是面向文档的数据库，文档存储格式为JSON，可以水平扩展至数以百计的服务器存储来实现处理PB级别的数据。</p>
|
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<h2 id="es">ES有哪些节点类型？<a class="headerlink" href="#es" title="Permanent link">¶</a></h2>
|
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<p>一个节点就是一个Elasticsearch的实例，每个节点需要显示指定节点名称，可以通过配置文件配置，或者启动时候<code>-E node.name=node1</code>指定</p>
|
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<h4 id="_1">节点类型<a class="headerlink" href="#_1" title="Permanent link">¶</a></h4>
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<p>每个节点在集群承担承担不同的角色，也可以称为节点类型。</p>
|
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|
<p><strong>候选主节点(Master-eligible nodes)和主节点(Master Node)</strong></p>
|
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|
<ul>
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<li>每个节点启动之后，默认就是一个Master eligible节点，Master-eligible节点可以参加选主流程，成为Master节点</li>
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|
<li>当第一个节点启动时候，它会将自己选举成为Master节点</li>
|
|
|
<li>在每个节点上都保存了集群的状态信息，但**只有Master节点才能修改集群的状态信息**。集群状态(Cluster State)中必要信息包含<ul>
|
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<li>所有节点的信息</li>
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<li>所有的索引，以及其Mapping与Setting信息</li>
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<li>分片的路由信息</li>
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</ul>
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</li>
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</ul>
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|
<p><strong>数据节点(Data Node)和协调节点(Coordinating Node)和Ingest节点</strong></p>
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<ul>
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|
|
<li>Data Node<ul>
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|
<li><strong>用于保存数据的节点。负责保存分片的数据，在数据拓展上起到至关重要的作用</strong></li>
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</ul>
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</li>
|
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<li>Coorination Node<ul>
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|
<li><strong>负责接受Client的请求，将请求分发到合适的节点，最终把结果汇集到一起</strong></li>
|
|
|
<li><strong>每个节点默认都起到Cooridinating Node的职责</strong>，这就意味着如果一个node，将node.master，node.data，node.ingest全部设置为false，那么它就是一个纯粹的coordinating Node node，仅仅用于接收客户端的请求，同时进行请求的转发和合并</li>
|
|
|
</ul>
|
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|
</li>
|
|
|
<li>Ingest节点<ul>
|
|
|
<li>用于预处理，可以运行pipeline脚本，用来对document写入索引文件之前进行预处理的</li>
|
|
|
</ul>
|
|
|
</li>
|
|
|
</ul>
|
|
|
<p>在生产环境部署上可以部署独立(dedicate)的 Ingest Node 和 Coordinate node，在前端的Load Balance前面增加转发规则把读分发到coording node，写分发到 ingest node。 如果集群负载不高，可以配置一些节点同时具备coording和ingest的能力。然后将读写全部路由到这些节点。不仅配置简单，还节约硬件成本</p>
|
|
|
<p><strong>其他类型节点</strong></p>
|
|
|
<ul>
|
|
|
<li>
|
|
|
<p>冷热节点(Hot & Warm Node)</p>
|
|
|
<ul>
|
|
|
<li>不同硬件配置的Data Node，用来实现Hot & Warm架构，降低集群部署的成本。通过设置节点属性来实现</li>
|
|
|
</ul>
|
|
|
</li>
|
|
|
<li>
|
|
|
<p>机器学习节点(Machine Learning Node)</p>
|
|
|
<ul>
|
|
|
<li>负责跑机器学习的Job，用来异常检测</li>
|
|
|
</ul>
|
|
|
</li>
|
|
|
</ul>
|
|
|
<p>配置原则：</p>
|
|
|
<ul>
|
|
|
<li>开发环境一个节点可以承担多种角色，节省服务器资源</li>
|
|
|
<li>生产环境中，应该设置单一的角色的节点，即dedicated node</li>
|
|
|
</ul>
|
|
|
<table>
|
|
|
<thead>
|
|
|
<tr>
|
|
|
<th>节点类型</th>
|
|
|
<th>配置参数</th>
|
|
|
<th>默认值</th>
|
|
|
</tr>
|
|
|
</thead>
|
|
|
<tbody>
|
|
|
<tr>
|
|
|
<td>候选主节点</td>
|
|
|
<td>node.master</td>
|
|
|
<td>true</td>
|
|
|
</tr>
|
|
|
<tr>
|
|
|
<td>数据节点</td>
|
|
|
<td>node.data</td>
|
|
|
<td>true</td>
|
|
|
</tr>
|
|
|
<tr>
|
|
|
<td>ingest节点</td>
|
|
|
<td>node.ingest</td>
|
|
|
<td>true</td>
|
|
|
</tr>
|
|
|
<tr>
|
|
|
<td>协调节点</td>
|
|
|
<td>无</td>
|
|
|
<td>每个节点默认都是协调节点</td>
|
|
|
</tr>
|
|
|
<tr>
|
|
|
<td>机器学习节点</td>
|
|
|
<td>node.ml</td>
|
|
|
<td>true</td>
|
|
|
</tr>
|
|
|
</tbody>
|
|
|
</table>
|
|
|
<h2 id="es_1">为什么说ES是准实时的？<a class="headerlink" href="#es_1" title="Permanent link">¶</a></h2>
|
|
|
<p><a class="glightbox" href="https://static.cyub.vip/images/202107/es_index_flow.jpeg" data-type="image" data-width="auto" data-height="auto" data-desc-position="bottom"><img alt="" src="https://static.cyub.vip/images/202107/es_index_flow.jpeg" /></a>
|
|
|
Document首先写入到Indexing buffer中，当 buffer 中的数据每隔index.refresh_interval秒（或者Indexing buffer满了)缓存 refresh 到filesystem cache 中时，此时文档是可以检索到了</p>
|
|
|
<h2 id="es_2">怎么解决ES深度分页问题？<a class="headerlink" href="#es_2" title="Permanent link">¶</a></h2>
|
|
|
<p>深度分页指的是假设我们请求第 1000 页—结果从 10001 到 10010 。所有都以相同的方式工作除了每个分片不得不产生前10010个结果以外。 然后协调节点对全部 50050 个结果排序最后丢弃掉这些结果中的 50040 个结果。在分布式系统中，对结果排序的成本随分页的深度成指数上升。</p>
|
|
|
<p>解决办法就是业务上面避免。</p>
|
|
|
<h2 id="doc-values">doc values为了解决什么？<a class="headerlink" href="#doc-values" title="Permanent link">¶</a></h2>
|
|
|
<p>doc_values是为了解决排序和聚合问题。doc_values不适合text类型字段，对于text类型字段需要使用Fielddata</p>
|
|
|
<div class="language-text highlight"><pre><span></span><code><span id="__span-0-1"><a id="__codelineno-0-1" name="__codelineno-0-1" href="#__codelineno-0-1"></a>PUT /myindex/_mapping/doc
|
|
|
</span><span id="__span-0-2"><a id="__codelineno-0-2" name="__codelineno-0-2" href="#__codelineno-0-2"></a>{
|
|
|
</span><span id="__span-0-3"><a id="__codelineno-0-3" name="__codelineno-0-3" href="#__codelineno-0-3"></a> "properties": {
|
|
|
</span><span id="__span-0-4"><a id="__codelineno-0-4" name="__codelineno-0-4" href="#__codelineno-0-4"></a> "myfield": {
|
|
|
</span><span id="__span-0-5"><a id="__codelineno-0-5" name="__codelineno-0-5" href="#__codelineno-0-5"></a> "type": "text",
|
|
|
</span><span id="__span-0-6"><a id="__codelineno-0-6" name="__codelineno-0-6" href="#__codelineno-0-6"></a> "fields":{
|
|
|
</span><span id="__span-0-7"><a id="__codelineno-0-7" name="__codelineno-0-7" href="#__codelineno-0-7"></a> "keyword":{
|
|
|
</span><span id="__span-0-8"><a id="__codelineno-0-8" name="__codelineno-0-8" href="#__codelineno-0-8"></a> "type":"keyword",
|
|
|
</span><span id="__span-0-9"><a id="__codelineno-0-9" name="__codelineno-0-9" href="#__codelineno-0-9"></a> "ignore_above":256
|
|
|
</span><span id="__span-0-10"><a id="__codelineno-0-10" name="__codelineno-0-10" href="#__codelineno-0-10"></a> }
|
|
|
</span><span id="__span-0-11"><a id="__codelineno-0-11" name="__codelineno-0-11" href="#__codelineno-0-11"></a> }
|
|
|
</span><span id="__span-0-12"><a id="__codelineno-0-12" name="__codelineno-0-12" href="#__codelineno-0-12"></a> }
|
|
|
</span><span id="__span-0-13"><a id="__codelineno-0-13" name="__codelineno-0-13" href="#__codelineno-0-13"></a> }
|
|
|
</span><span id="__span-0-14"><a id="__codelineno-0-14" name="__codelineno-0-14" href="#__codelineno-0-14"></a>}
|
|
|
</span></code></pre></div>
|
|
|
<p>上面myfield是不可以聚合的，但是myfield.keyword是可以聚合的</p>
|
|
|
<h2 id="es_3">ES中副本分片的目的是做什么？<a class="headerlink" href="#es_3" title="Permanent link">¶</a></h2>
|
|
|
<ol>
|
|
|
<li>
|
|
|
<p>副本分片的主要目的就是为了故障转移，如果持有主分片的节点挂掉了，一个副本分片就会晋升为主分片的角色。</p>
|
|
|
</li>
|
|
|
<li>
|
|
|
<p>副本分片可以服务于读请求，可以通过增加副本的数目来提升查询性能</p>
|
|
|
</li>
|
|
|
</ol>
|
|
|
<h2 id="_2">怎样在不停机情况下，进行索引重建？<a class="headerlink" href="#_2" title="Permanent link">¶</a></h2>
|
|
|
<p>索引别名</p>
|
|
|
<h2 id="es_4">ES数据建模有哪些模式？<a class="headerlink" href="#es_4" title="Permanent link">¶</a></h2>
|
|
|
<p>加入我们正在根据用户名称，搜索其博客文章</p>
|
|
|
<h3 id="_3">应用层联接<a class="headerlink" href="#_3" title="Permanent link">¶</a></h3>
|
|
|
<p>根据user索引搜索到用户id，然后根据id去搜索文章索引blogpost</p>
|
|
|
<div class="language-text highlight"><pre><span></span><code><span id="__span-1-1"><a id="__codelineno-1-1" name="__codelineno-1-1" href="#__codelineno-1-1"></a>PUT /my_index/user/1
|
|
|
</span><span id="__span-1-2"><a id="__codelineno-1-2" name="__codelineno-1-2" href="#__codelineno-1-2"></a>{
|
|
|
</span><span id="__span-1-3"><a id="__codelineno-1-3" name="__codelineno-1-3" href="#__codelineno-1-3"></a> "name": "John Smith",
|
|
|
</span><span id="__span-1-4"><a id="__codelineno-1-4" name="__codelineno-1-4" href="#__codelineno-1-4"></a> "email": "john@smith.com",
|
|
|
</span><span id="__span-1-5"><a id="__codelineno-1-5" name="__codelineno-1-5" href="#__codelineno-1-5"></a> "dob": "1970/10/24"
|
|
|
</span><span id="__span-1-6"><a id="__codelineno-1-6" name="__codelineno-1-6" href="#__codelineno-1-6"></a>}
|
|
|
</span><span id="__span-1-7"><a id="__codelineno-1-7" name="__codelineno-1-7" href="#__codelineno-1-7"></a>
|
|
|
</span><span id="__span-1-8"><a id="__codelineno-1-8" name="__codelineno-1-8" href="#__codelineno-1-8"></a>PUT /my_index/blogpost/2
|
|
|
</span><span id="__span-1-9"><a id="__codelineno-1-9" name="__codelineno-1-9" href="#__codelineno-1-9"></a>{
|
|
|
</span><span id="__span-1-10"><a id="__codelineno-1-10" name="__codelineno-1-10" href="#__codelineno-1-10"></a> "title": "Relationships",
|
|
|
</span><span id="__span-1-11"><a id="__codelineno-1-11" name="__codelineno-1-11" href="#__codelineno-1-11"></a> "body": "It's complicated...",
|
|
|
</span><span id="__span-1-12"><a id="__codelineno-1-12" name="__codelineno-1-12" href="#__codelineno-1-12"></a> "user": 1
|
|
|
</span><span id="__span-1-13"><a id="__codelineno-1-13" name="__codelineno-1-13" href="#__codelineno-1-13"></a>}
|
|
|
</span></code></pre></div>
|
|
|
<h3 id="_4">反范式设计<a class="headerlink" href="#_4" title="Permanent link">¶</a></h3>
|
|
|
<p>用于1对多模式下，将1的信息，存放在N这一边。下面就是把用户信息存放一份在blogpost这里面</p>
|
|
|
<div class="language-text highlight"><pre><span></span><code><span id="__span-2-1"><a id="__codelineno-2-1" name="__codelineno-2-1" href="#__codelineno-2-1"></a>PUT /my_index/user/1
|
|
|
</span><span id="__span-2-2"><a id="__codelineno-2-2" name="__codelineno-2-2" href="#__codelineno-2-2"></a>{
|
|
|
</span><span id="__span-2-3"><a id="__codelineno-2-3" name="__codelineno-2-3" href="#__codelineno-2-3"></a> "name": "John Smith",
|
|
|
</span><span id="__span-2-4"><a id="__codelineno-2-4" name="__codelineno-2-4" href="#__codelineno-2-4"></a> "email": "john@smith.com",
|
|
|
</span><span id="__span-2-5"><a id="__codelineno-2-5" name="__codelineno-2-5" href="#__codelineno-2-5"></a> "dob": "1970/10/24"
|
|
|
</span><span id="__span-2-6"><a id="__codelineno-2-6" name="__codelineno-2-6" href="#__codelineno-2-6"></a>}
|
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</span><span id="__span-2-7"><a id="__codelineno-2-7" name="__codelineno-2-7" href="#__codelineno-2-7"></a>
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</span><span id="__span-2-8"><a id="__codelineno-2-8" name="__codelineno-2-8" href="#__codelineno-2-8"></a>PUT /my_index/blogpost/2
|
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</span><span id="__span-2-9"><a id="__codelineno-2-9" name="__codelineno-2-9" href="#__codelineno-2-9"></a>{
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</span><span id="__span-2-10"><a id="__codelineno-2-10" name="__codelineno-2-10" href="#__codelineno-2-10"></a> "title": "Relationships",
|
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</span><span id="__span-2-11"><a id="__codelineno-2-11" name="__codelineno-2-11" href="#__codelineno-2-11"></a> "body": "It's complicated...",
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</span><span id="__span-2-12"><a id="__codelineno-2-12" name="__codelineno-2-12" href="#__codelineno-2-12"></a> "user": {
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</span><span id="__span-2-13"><a id="__codelineno-2-13" name="__codelineno-2-13" href="#__codelineno-2-13"></a> "id": 1,
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</span><span id="__span-2-14"><a id="__codelineno-2-14" name="__codelineno-2-14" href="#__codelineno-2-14"></a> "name": "John Smith"
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</span><span id="__span-2-15"><a id="__codelineno-2-15" name="__codelineno-2-15" href="#__codelineno-2-15"></a> }
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</span><span id="__span-2-16"><a id="__codelineno-2-16" name="__codelineno-2-16" href="#__codelineno-2-16"></a>}
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</span></code></pre></div>
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<h3 id="_5">嵌套对象<a class="headerlink" href="#_5" title="Permanent link">¶</a></h3>
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<p>假定们可以将一篇博客文章的评论以一个 comments 数组的形式和博客文章放在一起：</p>
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<div class="language-text highlight"><pre><span></span><code><span id="__span-3-1"><a id="__codelineno-3-1" name="__codelineno-3-1" href="#__codelineno-3-1"></a>PUT /my_index/blogpost/1
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</span><span id="__span-3-2"><a id="__codelineno-3-2" name="__codelineno-3-2" href="#__codelineno-3-2"></a>{
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</span><span id="__span-3-3"><a id="__codelineno-3-3" name="__codelineno-3-3" href="#__codelineno-3-3"></a> "title": "Nest eggs",
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</span><span id="__span-3-4"><a id="__codelineno-3-4" name="__codelineno-3-4" href="#__codelineno-3-4"></a> "body": "Making your money work...",
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</span><span id="__span-3-5"><a id="__codelineno-3-5" name="__codelineno-3-5" href="#__codelineno-3-5"></a> "tags": [ "cash", "shares" ],
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</span><span id="__span-3-6"><a id="__codelineno-3-6" name="__codelineno-3-6" href="#__codelineno-3-6"></a> "comments": [
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</span><span id="__span-3-7"><a id="__codelineno-3-7" name="__codelineno-3-7" href="#__codelineno-3-7"></a> {
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</span><span id="__span-3-8"><a id="__codelineno-3-8" name="__codelineno-3-8" href="#__codelineno-3-8"></a> "name": "John Smith",
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</span><span id="__span-3-9"><a id="__codelineno-3-9" name="__codelineno-3-9" href="#__codelineno-3-9"></a> "comment": "Great article",
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</span><span id="__span-3-10"><a id="__codelineno-3-10" name="__codelineno-3-10" href="#__codelineno-3-10"></a> "age": 28,
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</span><span id="__span-3-11"><a id="__codelineno-3-11" name="__codelineno-3-11" href="#__codelineno-3-11"></a> "stars": 4,
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</span><span id="__span-3-12"><a id="__codelineno-3-12" name="__codelineno-3-12" href="#__codelineno-3-12"></a> "date": "2014-09-01"
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</span><span id="__span-3-13"><a id="__codelineno-3-13" name="__codelineno-3-13" href="#__codelineno-3-13"></a> },
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</span><span id="__span-3-14"><a id="__codelineno-3-14" name="__codelineno-3-14" href="#__codelineno-3-14"></a> {
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</span><span id="__span-3-15"><a id="__codelineno-3-15" name="__codelineno-3-15" href="#__codelineno-3-15"></a> "name": "Alice White",
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</span><span id="__span-3-16"><a id="__codelineno-3-16" name="__codelineno-3-16" href="#__codelineno-3-16"></a> "comment": "More like this please",
|
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</span><span id="__span-3-17"><a id="__codelineno-3-17" name="__codelineno-3-17" href="#__codelineno-3-17"></a> "age": 31,
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</span><span id="__span-3-18"><a id="__codelineno-3-18" name="__codelineno-3-18" href="#__codelineno-3-18"></a> "stars": 5,
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</span><span id="__span-3-19"><a id="__codelineno-3-19" name="__codelineno-3-19" href="#__codelineno-3-19"></a> "date": "2014-10-22"
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</span><span id="__span-3-20"><a id="__codelineno-3-20" name="__codelineno-3-20" href="#__codelineno-3-20"></a> }
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</span><span id="__span-3-21"><a id="__codelineno-3-21" name="__codelineno-3-21" href="#__codelineno-3-21"></a> ]
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</span><span id="__span-3-22"><a id="__codelineno-3-22" name="__codelineno-3-22" href="#__codelineno-3-22"></a>}
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</span></code></pre></div>
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<p>我们想要搜索到评论者是Alice，且年龄是28岁的评论，搜索语句如下：</p>
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<div class="language-text highlight"><pre><span></span><code><span id="__span-4-1"><a id="__codelineno-4-1" name="__codelineno-4-1" href="#__codelineno-4-1"></a>GET /_search
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</span><span id="__span-4-2"><a id="__codelineno-4-2" name="__codelineno-4-2" href="#__codelineno-4-2"></a>{
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</span><span id="__span-4-3"><a id="__codelineno-4-3" name="__codelineno-4-3" href="#__codelineno-4-3"></a> "query": {
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</span><span id="__span-4-4"><a id="__codelineno-4-4" name="__codelineno-4-4" href="#__codelineno-4-4"></a> "bool": {
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</span><span id="__span-4-5"><a id="__codelineno-4-5" name="__codelineno-4-5" href="#__codelineno-4-5"></a> "must": [
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</span><span id="__span-4-6"><a id="__codelineno-4-6" name="__codelineno-4-6" href="#__codelineno-4-6"></a> { "match": { "name": "Alice" }},
|
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</span><span id="__span-4-7"><a id="__codelineno-4-7" name="__codelineno-4-7" href="#__codelineno-4-7"></a> { "match": { "age": 28 }}
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</span><span id="__span-4-8"><a id="__codelineno-4-8" name="__codelineno-4-8" href="#__codelineno-4-8"></a> ]
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</span><span id="__span-4-9"><a id="__codelineno-4-9" name="__codelineno-4-9" href="#__codelineno-4-9"></a> }
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</span><span id="__span-4-10"><a id="__codelineno-4-10" name="__codelineno-4-10" href="#__codelineno-4-10"></a> }
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</span><span id="__span-4-11"><a id="__codelineno-4-11" name="__codelineno-4-11" href="#__codelineno-4-11"></a>}
|
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</span></code></pre></div>
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<p>搜索结果却能够搜索到记录。这是不符合预期的。</p>
|
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<p>这是因为对象数组中JSON 格式的文档被处理成如下的扁平式键值对的结构，comments对象中字段失去关联：</p>
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<div class="language-text highlight"><pre><span></span><code><span id="__span-5-1"><a id="__codelineno-5-1" name="__codelineno-5-1" href="#__codelineno-5-1"></a>{
|
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</span><span id="__span-5-2"><a id="__codelineno-5-2" name="__codelineno-5-2" href="#__codelineno-5-2"></a> "title": [ eggs, nest ],
|
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</span><span id="__span-5-3"><a id="__codelineno-5-3" name="__codelineno-5-3" href="#__codelineno-5-3"></a> "body": [ making, money, work, your ],
|
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</span><span id="__span-5-4"><a id="__codelineno-5-4" name="__codelineno-5-4" href="#__codelineno-5-4"></a> "tags": [ cash, shares ],
|
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</span><span id="__span-5-5"><a id="__codelineno-5-5" name="__codelineno-5-5" href="#__codelineno-5-5"></a> "comments.name": [ alice, john, smith, white ],
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</span><span id="__span-5-6"><a id="__codelineno-5-6" name="__codelineno-5-6" href="#__codelineno-5-6"></a> "comments.comment": [ article, great, like, more, please, this ],
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</span><span id="__span-5-7"><a id="__codelineno-5-7" name="__codelineno-5-7" href="#__codelineno-5-7"></a> "comments.age": [ 28, 31 ],
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</span><span id="__span-5-8"><a id="__codelineno-5-8" name="__codelineno-5-8" href="#__codelineno-5-8"></a> "comments.stars": [ 4, 5 ],
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</span><span id="__span-5-9"><a id="__codelineno-5-9" name="__codelineno-5-9" href="#__codelineno-5-9"></a> "comments.date": [ 2014-09-01, 2014-10-22 ]
|
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</span><span id="__span-5-10"><a id="__codelineno-5-10" name="__codelineno-5-10" href="#__codelineno-5-10"></a>}
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</span></code></pre></div>
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<p>这时候我们可以使用nested object，来保证子对象关系未打散：</p>
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<div class="language-text highlight"><pre><span></span><code><span id="__span-6-1"><a id="__codelineno-6-1" name="__codelineno-6-1" href="#__codelineno-6-1"></a>{
|
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</span><span id="__span-6-2"><a id="__codelineno-6-2" name="__codelineno-6-2" href="#__codelineno-6-2"></a> "comments.name": [ john, smith ],
|
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</span><span id="__span-6-3"><a id="__codelineno-6-3" name="__codelineno-6-3" href="#__codelineno-6-3"></a> "comments.comment": [ article, great ],
|
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</span><span id="__span-6-4"><a id="__codelineno-6-4" name="__codelineno-6-4" href="#__codelineno-6-4"></a> "comments.age": [ 28 ],
|
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</span><span id="__span-6-5"><a id="__codelineno-6-5" name="__codelineno-6-5" href="#__codelineno-6-5"></a> "comments.stars": [ 4 ],
|
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</span><span id="__span-6-6"><a id="__codelineno-6-6" name="__codelineno-6-6" href="#__codelineno-6-6"></a> "comments.date": [ 2014-09-01 ]
|
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</span><span id="__span-6-7"><a id="__codelineno-6-7" name="__codelineno-6-7" href="#__codelineno-6-7"></a>}
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</span><span id="__span-6-8"><a id="__codelineno-6-8" name="__codelineno-6-8" href="#__codelineno-6-8"></a>{
|
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</span><span id="__span-6-9"><a id="__codelineno-6-9" name="__codelineno-6-9" href="#__codelineno-6-9"></a> "comments.name": [ alice, white ],
|
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</span><span id="__span-6-10"><a id="__codelineno-6-10" name="__codelineno-6-10" href="#__codelineno-6-10"></a> "comments.comment": [ like, more, please, this ],
|
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</span><span id="__span-6-11"><a id="__codelineno-6-11" name="__codelineno-6-11" href="#__codelineno-6-11"></a> "comments.age": [ 31 ],
|
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</span><span id="__span-6-12"><a id="__codelineno-6-12" name="__codelineno-6-12" href="#__codelineno-6-12"></a> "comments.stars": [ 5 ],
|
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</span><span id="__span-6-13"><a id="__codelineno-6-13" name="__codelineno-6-13" href="#__codelineno-6-13"></a> "comments.date": [ 2014-10-22 ]
|
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</span><span id="__span-6-14"><a id="__codelineno-6-14" name="__codelineno-6-14" href="#__codelineno-6-14"></a>}
|
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</span><span id="__span-6-15"><a id="__codelineno-6-15" name="__codelineno-6-15" href="#__codelineno-6-15"></a>{
|
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|
</span><span id="__span-6-16"><a id="__codelineno-6-16" name="__codelineno-6-16" href="#__codelineno-6-16"></a> "title": [ eggs, nest ],
|
|
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</span><span id="__span-6-17"><a id="__codelineno-6-17" name="__codelineno-6-17" href="#__codelineno-6-17"></a> "body": [ making, money, work, your ],
|
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</span><span id="__span-6-18"><a id="__codelineno-6-18" name="__codelineno-6-18" href="#__codelineno-6-18"></a> "tags": [ cash, shares ]
|
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</span><span id="__span-6-19"><a id="__codelineno-6-19" name="__codelineno-6-19" href="#__codelineno-6-19"></a>}
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</span><span id="__span-6-20"><a id="__codelineno-6-20" name="__codelineno-6-20" href="#__codelineno-6-20"></a>
|
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</span><span id="__span-6-21"><a id="__codelineno-6-21" name="__codelineno-6-21" href="#__codelineno-6-21"></a>
|
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</span><span id="__span-6-22"><a id="__codelineno-6-22" name="__codelineno-6-22" href="#__codelineno-6-22"></a>PUT /my_index
|
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</span><span id="__span-6-23"><a id="__codelineno-6-23" name="__codelineno-6-23" href="#__codelineno-6-23"></a>{
|
|
|
</span><span id="__span-6-24"><a id="__codelineno-6-24" name="__codelineno-6-24" href="#__codelineno-6-24"></a> "mappings": {
|
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</span><span id="__span-6-25"><a id="__codelineno-6-25" name="__codelineno-6-25" href="#__codelineno-6-25"></a> "blogpost": {
|
|
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</span><span id="__span-6-26"><a id="__codelineno-6-26" name="__codelineno-6-26" href="#__codelineno-6-26"></a> "properties": {
|
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</span><span id="__span-6-27"><a id="__codelineno-6-27" name="__codelineno-6-27" href="#__codelineno-6-27"></a> "comments": {
|
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|
</span><span id="__span-6-28"><a id="__codelineno-6-28" name="__codelineno-6-28" href="#__codelineno-6-28"></a> "type": "nested",
|
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</span><span id="__span-6-29"><a id="__codelineno-6-29" name="__codelineno-6-29" href="#__codelineno-6-29"></a> "properties": {
|
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</span><span id="__span-6-30"><a id="__codelineno-6-30" name="__codelineno-6-30" href="#__codelineno-6-30"></a> "name": { "type": "string" },
|
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</span><span id="__span-6-31"><a id="__codelineno-6-31" name="__codelineno-6-31" href="#__codelineno-6-31"></a> "comment": { "type": "string" },
|
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</span><span id="__span-6-32"><a id="__codelineno-6-32" name="__codelineno-6-32" href="#__codelineno-6-32"></a> "age": { "type": "short" },
|
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</span><span id="__span-6-33"><a id="__codelineno-6-33" name="__codelineno-6-33" href="#__codelineno-6-33"></a> "stars": { "type": "short" },
|
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</span><span id="__span-6-34"><a id="__codelineno-6-34" name="__codelineno-6-34" href="#__codelineno-6-34"></a> "date": { "type": "date" }
|
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</span><span id="__span-6-35"><a id="__codelineno-6-35" name="__codelineno-6-35" href="#__codelineno-6-35"></a> }
|
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</span><span id="__span-6-36"><a id="__codelineno-6-36" name="__codelineno-6-36" href="#__codelineno-6-36"></a> }
|
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</span><span id="__span-6-37"><a id="__codelineno-6-37" name="__codelineno-6-37" href="#__codelineno-6-37"></a> }
|
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</span><span id="__span-6-38"><a id="__codelineno-6-38" name="__codelineno-6-38" href="#__codelineno-6-38"></a> }
|
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</span><span id="__span-6-39"><a id="__codelineno-6-39" name="__codelineno-6-39" href="#__codelineno-6-39"></a> }
|
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</span><span id="__span-6-40"><a id="__codelineno-6-40" name="__codelineno-6-40" href="#__codelineno-6-40"></a>}
|
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</span></code></pre></div>
|
|
|
<h3 id="_6">父子文档<a class="headerlink" href="#_6" title="Permanent link">¶</a></h3>
|
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|
<p>在 nested objects 文档中，所有对象都是在同一个文档中，而在父-子关系文档中，父对象和子对象都是完全独立的文档。</p>
|
|
|
<p>父-子关系的主要优势有：</p>
|
|
|
<ul>
|
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|
<li>更新父文档时，不会重新索引子文档。</li>
|
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|
<li>创建，修改或删除子文档时，不会影响父文档或其他子文档。这一点在这种场景下尤其有用：子文档数量较多，并且子文档创建和修改的频率高时。</li>
|
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|
<li>子文档可以作为搜索结果独立返回。</li>
|
|
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</ul>
|
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<h2 id="es_5">ES索引生命周期管理是怎么回事？<a class="headerlink" href="#es_5" title="Permanent link">¶</a></h2>
|
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|
<p>ES索引生命周期管理分为4个阶段：hot、warm、cold、delete，其中hot主要负责对索引进行rollover操作，warm、cold、delete分别对rollover后的数据进一步处理。</p>
|
|
|
<table>
|
|
|
<thead>
|
|
|
<tr>
|
|
|
<th>phases</th>
|
|
|
<th>desc</th>
|
|
|
</tr>
|
|
|
</thead>
|
|
|
<tbody>
|
|
|
<tr>
|
|
|
<td>hot</td>
|
|
|
<td>索引更新和查询很活跃</td>
|
|
|
</tr>
|
|
|
<tr>
|
|
|
<td>warm</td>
|
|
|
<td>索引不再更新，但仍然有查询</td>
|
|
|
</tr>
|
|
|
<tr>
|
|
|
<td>cold</td>
|
|
|
<td>索引不再更新，只有很少的查询，而且查询速度也很慢</td>
|
|
|
</tr>
|
|
|
<tr>
|
|
|
<td>delete</td>
|
|
|
<td>索引不需要了，可以安全的删除</td>
|
|
|
</tr>
|
|
|
</tbody>
|
|
|
</table>
|
|
|
<h3 id="_7">操作<a class="headerlink" href="#_7" title="Permanent link">¶</a></h3>
|
|
|
<h4 id="timing">timing<a class="headerlink" href="#timing" title="Permanent link">¶</a></h4>
|
|
|
<p>ILM各个阶段的action几乎都需要用到定时器，例如下面这个操作：</p>
|
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|
<div class="language-text highlight"><pre><span></span><code><span id="__span-7-1"><a id="__codelineno-7-1" name="__codelineno-7-1" href="#__codelineno-7-1"></a>curl -X PUT "localhost:9200/_ilm/policy/my_policy" -H 'Content-Type: application/json' -d'
|
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</span><span id="__span-7-2"><a id="__codelineno-7-2" name="__codelineno-7-2" href="#__codelineno-7-2"></a>{
|
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</span><span id="__span-7-3"><a id="__codelineno-7-3" name="__codelineno-7-3" href="#__codelineno-7-3"></a> "policy": {
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</span><span id="__span-7-4"><a id="__codelineno-7-4" name="__codelineno-7-4" href="#__codelineno-7-4"></a> "phases": {
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</span><span id="__span-7-5"><a id="__codelineno-7-5" name="__codelineno-7-5" href="#__codelineno-7-5"></a> "warm": {
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</span><span id="__span-7-6"><a id="__codelineno-7-6" name="__codelineno-7-6" href="#__codelineno-7-6"></a> "min_age": "1d",
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</span><span id="__span-7-7"><a id="__codelineno-7-7" name="__codelineno-7-7" href="#__codelineno-7-7"></a> "actions": {
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</span><span id="__span-7-8"><a id="__codelineno-7-8" name="__codelineno-7-8" href="#__codelineno-7-8"></a> "allocate": {
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</span><span id="__span-7-9"><a id="__codelineno-7-9" name="__codelineno-7-9" href="#__codelineno-7-9"></a> "number_of_replicas": 1
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</span><span id="__span-7-10"><a id="__codelineno-7-10" name="__codelineno-7-10" href="#__codelineno-7-10"></a> }
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</span><span id="__span-7-11"><a id="__codelineno-7-11" name="__codelineno-7-11" href="#__codelineno-7-11"></a> }
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</span><span id="__span-7-12"><a id="__codelineno-7-12" name="__codelineno-7-12" href="#__codelineno-7-12"></a> },
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</span><span id="__span-7-13"><a id="__codelineno-7-13" name="__codelineno-7-13" href="#__codelineno-7-13"></a> "delete": {
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</span><span id="__span-7-14"><a id="__codelineno-7-14" name="__codelineno-7-14" href="#__codelineno-7-14"></a> "min_age": "30d",
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</span><span id="__span-7-15"><a id="__codelineno-7-15" name="__codelineno-7-15" href="#__codelineno-7-15"></a> "actions": {
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</span><span id="__span-7-16"><a id="__codelineno-7-16" name="__codelineno-7-16" href="#__codelineno-7-16"></a> "delete": {}
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</span><span id="__span-7-17"><a id="__codelineno-7-17" name="__codelineno-7-17" href="#__codelineno-7-17"></a> }
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</span><span id="__span-7-18"><a id="__codelineno-7-18" name="__codelineno-7-18" href="#__codelineno-7-18"></a> }
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</span><span id="__span-7-19"><a id="__codelineno-7-19" name="__codelineno-7-19" href="#__codelineno-7-19"></a> }
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</span><span id="__span-7-20"><a id="__codelineno-7-20" name="__codelineno-7-20" href="#__codelineno-7-20"></a> }
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</span><span id="__span-7-21"><a id="__codelineno-7-21" name="__codelineno-7-21" href="#__codelineno-7-21"></a>}
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</span><span id="__span-7-22"><a id="__codelineno-7-22" name="__codelineno-7-22" href="#__codelineno-7-22"></a>'
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</span><span id="__span-7-23"><a id="__codelineno-7-23" name="__codelineno-7-23" href="#__codelineno-7-23"></a>
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</span><span id="__span-7-24"><a id="__codelineno-7-24" name="__codelineno-7-24" href="#__codelineno-7-24"></a># 应用到模板上
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</span><span id="__span-7-25"><a id="__codelineno-7-25" name="__codelineno-7-25" href="#__codelineno-7-25"></a>PUT _index_template/my_template
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</span><span id="__span-7-26"><a id="__codelineno-7-26" name="__codelineno-7-26" href="#__codelineno-7-26"></a>{
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</span><span id="__span-7-27"><a id="__codelineno-7-27" name="__codelineno-7-27" href="#__codelineno-7-27"></a> "index_patterns": ["test-*"],
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</span><span id="__span-7-28"><a id="__codelineno-7-28" name="__codelineno-7-28" href="#__codelineno-7-28"></a> "template": {
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</span><span id="__span-7-29"><a id="__codelineno-7-29" name="__codelineno-7-29" href="#__codelineno-7-29"></a> "settings": {
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</span><span id="__span-7-30"><a id="__codelineno-7-30" name="__codelineno-7-30" href="#__codelineno-7-30"></a> "number_of_shards": 1,
|
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</span><span id="__span-7-31"><a id="__codelineno-7-31" name="__codelineno-7-31" href="#__codelineno-7-31"></a> "number_of_replicas": 1,
|
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</span><span id="__span-7-32"><a id="__codelineno-7-32" name="__codelineno-7-32" href="#__codelineno-7-32"></a> "index.lifecycle.name": "my_policy",
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</span><span id="__span-7-33"><a id="__codelineno-7-33" name="__codelineno-7-33" href="#__codelineno-7-33"></a> "index.lifecycle.rollover_alias": "test-alias"
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</span><span id="__span-7-34"><a id="__codelineno-7-34" name="__codelineno-7-34" href="#__codelineno-7-34"></a> }
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</span><span id="__span-7-35"><a id="__codelineno-7-35" name="__codelineno-7-35" href="#__codelineno-7-35"></a> }
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</span><span id="__span-7-36"><a id="__codelineno-7-36" name="__codelineno-7-36" href="#__codelineno-7-36"></a>}
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</span></code></pre></div>
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<p>上述warm阶段通过min_age配置了1d，意思是索引从创建至少需要经历1天的时间才会被移入到warm阶段，另一个delete阶段min_age配置了30d，意思是索引在创建后的30天会被删除；通常情况下warm、cold、delete的起始时间是从索引创建开始算起的，但是如果配置了hot，那么后面phrase配置的时间应该大于rollover的时间。</p>
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<h4 id="hot-rollover">Hot Rollover<a class="headerlink" href="#hot-rollover" title="Permanent link">¶</a></h4>
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<div class="language-text highlight"><pre><span></span><code><span id="__span-8-1"><a id="__codelineno-8-1" name="__codelineno-8-1" href="#__codelineno-8-1"></a>curl -X PUT "localhost:9200/_ilm/policy/datastream_policy" -H 'Content-Type: application/json' -d'
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</span><span id="__span-8-2"><a id="__codelineno-8-2" name="__codelineno-8-2" href="#__codelineno-8-2"></a>{
|
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</span><span id="__span-8-3"><a id="__codelineno-8-3" name="__codelineno-8-3" href="#__codelineno-8-3"></a> "policy": {
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</span><span id="__span-8-4"><a id="__codelineno-8-4" name="__codelineno-8-4" href="#__codelineno-8-4"></a> "phases": {
|
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</span><span id="__span-8-5"><a id="__codelineno-8-5" name="__codelineno-8-5" href="#__codelineno-8-5"></a> "hot": {
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</span><span id="__span-8-6"><a id="__codelineno-8-6" name="__codelineno-8-6" href="#__codelineno-8-6"></a> "actions": {
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</span><span id="__span-8-7"><a id="__codelineno-8-7" name="__codelineno-8-7" href="#__codelineno-8-7"></a> "rollover": {
|
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</span><span id="__span-8-8"><a id="__codelineno-8-8" name="__codelineno-8-8" href="#__codelineno-8-8"></a> "max_size": "50GB",
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</span><span id="__span-8-9"><a id="__codelineno-8-9" name="__codelineno-8-9" href="#__codelineno-8-9"></a> "max_age": "30d"
|
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</span><span id="__span-8-10"><a id="__codelineno-8-10" name="__codelineno-8-10" href="#__codelineno-8-10"></a> }
|
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</span><span id="__span-8-11"><a id="__codelineno-8-11" name="__codelineno-8-11" href="#__codelineno-8-11"></a> }
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</span><span id="__span-8-12"><a id="__codelineno-8-12" name="__codelineno-8-12" href="#__codelineno-8-12"></a> }
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</span><span id="__span-8-13"><a id="__codelineno-8-13" name="__codelineno-8-13" href="#__codelineno-8-13"></a> }
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</span><span id="__span-8-14"><a id="__codelineno-8-14" name="__codelineno-8-14" href="#__codelineno-8-14"></a>}
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</span><span id="__span-8-15"><a id="__codelineno-8-15" name="__codelineno-8-15" href="#__codelineno-8-15"></a>'
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</span></code></pre></div>
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<p>我们定义了一个策略，策略中使用了hot rollover action，当引用该策略的索引满足rollover中任一一个条件时就会触发滚动操作，生成新的索引，新索引的格式是 ^.*-\d+$ (如，index_name-000001)</p>
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<h4 id="warm-allocate">Warm Allocate<a class="headerlink" href="#warm-allocate" title="Permanent link">¶</a></h4>
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<p>allocate action主要有两个操作，1、转移数据到warm节点；2、修改索引副本数。</p>
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<div class="language-text highlight"><pre><span></span><code><span id="__span-9-1"><a id="__codelineno-9-1" name="__codelineno-9-1" href="#__codelineno-9-1"></a>PUT _ilm/policy/my_policy
|
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</span><span id="__span-9-2"><a id="__codelineno-9-2" name="__codelineno-9-2" href="#__codelineno-9-2"></a>{
|
|
|
</span><span id="__span-9-3"><a id="__codelineno-9-3" name="__codelineno-9-3" href="#__codelineno-9-3"></a> "policy": {
|
|
|
</span><span id="__span-9-4"><a id="__codelineno-9-4" name="__codelineno-9-4" href="#__codelineno-9-4"></a> "phases": {
|
|
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</span><span id="__span-9-5"><a id="__codelineno-9-5" name="__codelineno-9-5" href="#__codelineno-9-5"></a> "warm": {
|
|
|
</span><span id="__span-9-6"><a id="__codelineno-9-6" name="__codelineno-9-6" href="#__codelineno-9-6"></a> "actions": {
|
|
|
</span><span id="__span-9-7"><a id="__codelineno-9-7" name="__codelineno-9-7" href="#__codelineno-9-7"></a> "allocate" : {
|
|
|
</span><span id="__span-9-8"><a id="__codelineno-9-8" name="__codelineno-9-8" href="#__codelineno-9-8"></a> "number_of_replicas": 0,
|
|
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</span><span id="__span-9-9"><a id="__codelineno-9-9" name="__codelineno-9-9" href="#__codelineno-9-9"></a> "include" : {
|
|
|
</span><span id="__span-9-10"><a id="__codelineno-9-10" name="__codelineno-9-10" href="#__codelineno-9-10"></a> "box_type": "cold,warm"
|
|
|
</span><span id="__span-9-11"><a id="__codelineno-9-11" name="__codelineno-9-11" href="#__codelineno-9-11"></a> }
|
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</span><span id="__span-9-12"><a id="__codelineno-9-12" name="__codelineno-9-12" href="#__codelineno-9-12"></a> }
|
|
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</span><span id="__span-9-13"><a id="__codelineno-9-13" name="__codelineno-9-13" href="#__codelineno-9-13"></a> }
|
|
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</span><span id="__span-9-14"><a id="__codelineno-9-14" name="__codelineno-9-14" href="#__codelineno-9-14"></a> }
|
|
|
</span><span id="__span-9-15"><a id="__codelineno-9-15" name="__codelineno-9-15" href="#__codelineno-9-15"></a> }
|
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</span><span id="__span-9-16"><a id="__codelineno-9-16" name="__codelineno-9-16" href="#__codelineno-9-16"></a> }
|
|
|
</span><span id="__span-9-17"><a id="__codelineno-9-17" name="__codelineno-9-17" href="#__codelineno-9-17"></a>}
|
|
|
</span></code></pre></div>
|
|
|
<p>其中include配置的标签需要和elasticsearch.yml中配置的标签名一致，allocate支持的参数有：</p>
|
|
|
<p>参数 | 描述
|
|
|
number_of_replicas | 分配后索引保持的分片数
|
|
|
include | 至少满足其中一个标签
|
|
|
exclude | 排除包含这些标签的服务器
|
|
|
require | 需要同时满足所有配置的标签</p>
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|
<h4 id="warm-read-only">Warm Read-Only<a class="headerlink" href="#warm-read-only" title="Permanent link">¶</a></h4>
|
|
|
<p>配置索引为只读模式</p>
|
|
|
<div class="language-text highlight"><pre><span></span><code><span id="__span-10-1"><a id="__codelineno-10-1" name="__codelineno-10-1" href="#__codelineno-10-1"></a>curl -X PUT "localhost:9200/_ilm/policy/my_policy" -H 'Content-Type: application/json' -d'
|
|
|
</span><span id="__span-10-2"><a id="__codelineno-10-2" name="__codelineno-10-2" href="#__codelineno-10-2"></a>{
|
|
|
</span><span id="__span-10-3"><a id="__codelineno-10-3" name="__codelineno-10-3" href="#__codelineno-10-3"></a> "policy": {
|
|
|
</span><span id="__span-10-4"><a id="__codelineno-10-4" name="__codelineno-10-4" href="#__codelineno-10-4"></a> "phases": {
|
|
|
</span><span id="__span-10-5"><a id="__codelineno-10-5" name="__codelineno-10-5" href="#__codelineno-10-5"></a> "warm": {
|
|
|
</span><span id="__span-10-6"><a id="__codelineno-10-6" name="__codelineno-10-6" href="#__codelineno-10-6"></a> "actions": {
|
|
|
</span><span id="__span-10-7"><a id="__codelineno-10-7" name="__codelineno-10-7" href="#__codelineno-10-7"></a> "readonly" : { }
|
|
|
</span><span id="__span-10-8"><a id="__codelineno-10-8" name="__codelineno-10-8" href="#__codelineno-10-8"></a> }
|
|
|
</span><span id="__span-10-9"><a id="__codelineno-10-9" name="__codelineno-10-9" href="#__codelineno-10-9"></a> }
|
|
|
</span><span id="__span-10-10"><a id="__codelineno-10-10" name="__codelineno-10-10" href="#__codelineno-10-10"></a> }
|
|
|
</span><span id="__span-10-11"><a id="__codelineno-10-11" name="__codelineno-10-11" href="#__codelineno-10-11"></a> }
|
|
|
</span><span id="__span-10-12"><a id="__codelineno-10-12" name="__codelineno-10-12" href="#__codelineno-10-12"></a>}
|
|
|
</span><span id="__span-10-13"><a id="__codelineno-10-13" name="__codelineno-10-13" href="#__codelineno-10-13"></a>'
|
|
|
</span></code></pre></div>
|
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|
<h4 id="warm-force-merge">Warm Force-Merge<a class="headerlink" href="#warm-force-merge" title="Permanent link">¶</a></h4>
|
|
|
<p>指定索引合并后保留的segment数，过多的 segment 对查询性能有影响，为了充分合并数据，建议设置为 max_num_segments = 1</p>
|
|
|
<div class="language-text highlight"><pre><span></span><code><span id="__span-11-1"><a id="__codelineno-11-1" name="__codelineno-11-1" href="#__codelineno-11-1"></a>curl -X PUT "localhost:9200/_ilm/policy/my_policy" -H 'Content-Type: application/json' -d'
|
|
|
</span><span id="__span-11-2"><a id="__codelineno-11-2" name="__codelineno-11-2" href="#__codelineno-11-2"></a>{
|
|
|
</span><span id="__span-11-3"><a id="__codelineno-11-3" name="__codelineno-11-3" href="#__codelineno-11-3"></a> "policy": {
|
|
|
</span><span id="__span-11-4"><a id="__codelineno-11-4" name="__codelineno-11-4" href="#__codelineno-11-4"></a> "phases": {
|
|
|
</span><span id="__span-11-5"><a id="__codelineno-11-5" name="__codelineno-11-5" href="#__codelineno-11-5"></a> "warm": {
|
|
|
</span><span id="__span-11-6"><a id="__codelineno-11-6" name="__codelineno-11-6" href="#__codelineno-11-6"></a> "actions": {
|
|
|
</span><span id="__span-11-7"><a id="__codelineno-11-7" name="__codelineno-11-7" href="#__codelineno-11-7"></a> "forcemerge" : {
|
|
|
</span><span id="__span-11-8"><a id="__codelineno-11-8" name="__codelineno-11-8" href="#__codelineno-11-8"></a> "max_num_segments": 1
|
|
|
</span><span id="__span-11-9"><a id="__codelineno-11-9" name="__codelineno-11-9" href="#__codelineno-11-9"></a> }
|
|
|
</span><span id="__span-11-10"><a id="__codelineno-11-10" name="__codelineno-11-10" href="#__codelineno-11-10"></a> }
|
|
|
</span><span id="__span-11-11"><a id="__codelineno-11-11" name="__codelineno-11-11" href="#__codelineno-11-11"></a> }
|
|
|
</span><span id="__span-11-12"><a id="__codelineno-11-12" name="__codelineno-11-12" href="#__codelineno-11-12"></a> }
|
|
|
</span><span id="__span-11-13"><a id="__codelineno-11-13" name="__codelineno-11-13" href="#__codelineno-11-13"></a> }
|
|
|
</span><span id="__span-11-14"><a id="__codelineno-11-14" name="__codelineno-11-14" href="#__codelineno-11-14"></a>}
|
|
|
</span><span id="__span-11-15"><a id="__codelineno-11-15" name="__codelineno-11-15" href="#__codelineno-11-15"></a>'
|
|
|
</span></code></pre></div>
|
|
|
<p>需要注意的是，设置forcemerge action后索引会被修改为只读模式</p>
|
|
|
<h4 id="warm-shrink">Warm Shrink<a class="headerlink" href="#warm-shrink" title="Permanent link">¶</a></h4>
|
|
|
<p>通过shrink action可以降低索引的分片数量，同样执行该action操作后，索引会被修改为只读模式，同时索引名也会发生变化，如原来索引名称是“logs”，执行后的名称会多一个shrink-前缀，即“shrink-logs”。</p>
|
|
|
<div class="language-text highlight"><pre><span></span><code><span id="__span-12-1"><a id="__codelineno-12-1" name="__codelineno-12-1" href="#__codelineno-12-1"></a>curl -X PUT "localhost:9200/_ilm/policy/my_policy" -H 'Content-Type: application/json' -d'
|
|
|
</span><span id="__span-12-2"><a id="__codelineno-12-2" name="__codelineno-12-2" href="#__codelineno-12-2"></a>{
|
|
|
</span><span id="__span-12-3"><a id="__codelineno-12-3" name="__codelineno-12-3" href="#__codelineno-12-3"></a> "policy": {
|
|
|
</span><span id="__span-12-4"><a id="__codelineno-12-4" name="__codelineno-12-4" href="#__codelineno-12-4"></a> "phases": {
|
|
|
</span><span id="__span-12-5"><a id="__codelineno-12-5" name="__codelineno-12-5" href="#__codelineno-12-5"></a> "warm": {
|
|
|
</span><span id="__span-12-6"><a id="__codelineno-12-6" name="__codelineno-12-6" href="#__codelineno-12-6"></a> "actions": {
|
|
|
</span><span id="__span-12-7"><a id="__codelineno-12-7" name="__codelineno-12-7" href="#__codelineno-12-7"></a> "shrink" : {
|
|
|
</span><span id="__span-12-8"><a id="__codelineno-12-8" name="__codelineno-12-8" href="#__codelineno-12-8"></a> "number_of_shards": 1
|
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</span><span id="__span-12-9"><a id="__codelineno-12-9" name="__codelineno-12-9" href="#__codelineno-12-9"></a> }
|
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</span><span id="__span-12-10"><a id="__codelineno-12-10" name="__codelineno-12-10" href="#__codelineno-12-10"></a> }
|
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</span><span id="__span-12-11"><a id="__codelineno-12-11" name="__codelineno-12-11" href="#__codelineno-12-11"></a> }
|
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</span><span id="__span-12-12"><a id="__codelineno-12-12" name="__codelineno-12-12" href="#__codelineno-12-12"></a> }
|
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</span><span id="__span-12-13"><a id="__codelineno-12-13" name="__codelineno-12-13" href="#__codelineno-12-13"></a> }
|
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</span><span id="__span-12-14"><a id="__codelineno-12-14" name="__codelineno-12-14" href="#__codelineno-12-14"></a>}
|
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</span><span id="__span-12-15"><a id="__codelineno-12-15" name="__codelineno-12-15" href="#__codelineno-12-15"></a>'
|
|
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</span></code></pre></div>
|
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<h4 id="cold-freeze">Cold Freeze<a class="headerlink" href="#cold-freeze" title="Permanent link">¶</a></h4>
|
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<p>冻结索引意思就是关闭索引。</p>
|
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<div class="language-text highlight"><pre><span></span><code><span id="__span-13-1"><a id="__codelineno-13-1" name="__codelineno-13-1" href="#__codelineno-13-1"></a>PUT _ilm/policy/my_policy
|
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</span><span id="__span-13-2"><a id="__codelineno-13-2" name="__codelineno-13-2" href="#__codelineno-13-2"></a>{
|
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</span><span id="__span-13-3"><a id="__codelineno-13-3" name="__codelineno-13-3" href="#__codelineno-13-3"></a> "policy": {
|
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</span><span id="__span-13-4"><a id="__codelineno-13-4" name="__codelineno-13-4" href="#__codelineno-13-4"></a> "phases": {
|
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</span><span id="__span-13-5"><a id="__codelineno-13-5" name="__codelineno-13-5" href="#__codelineno-13-5"></a> "cold": {
|
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</span><span id="__span-13-6"><a id="__codelineno-13-6" name="__codelineno-13-6" href="#__codelineno-13-6"></a> "actions": {
|
|
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</span><span id="__span-13-7"><a id="__codelineno-13-7" name="__codelineno-13-7" href="#__codelineno-13-7"></a> "freeze" : { }
|
|
|
</span><span id="__span-13-8"><a id="__codelineno-13-8" name="__codelineno-13-8" href="#__codelineno-13-8"></a> }
|
|
|
</span><span id="__span-13-9"><a id="__codelineno-13-9" name="__codelineno-13-9" href="#__codelineno-13-9"></a> }
|
|
|
</span><span id="__span-13-10"><a id="__codelineno-13-10" name="__codelineno-13-10" href="#__codelineno-13-10"></a> }
|
|
|
</span><span id="__span-13-11"><a id="__codelineno-13-11" name="__codelineno-13-11" href="#__codelineno-13-11"></a> }
|
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</span><span id="__span-13-12"><a id="__codelineno-13-12" name="__codelineno-13-12" href="#__codelineno-13-12"></a>}
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</span></code></pre></div>
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