Elasticsearch

Elasticsearch 介绍 Elasticsearch 7:快速上手 Elasticsearch 7:关于 Index、Type、Document Elasticsearch 7:安装与启动 Elasticsearch 7:Kibana 的使用 Elasticsearch 7:下载历史版本 Elasticsearch 7:文档唯一性 Elasticsearch 7:默认端口与端口设置 Elasticsearch 7:创建和删除索引 Elasticsearch 7:自定义 mapping 和 settings Elasticsearch 7:设置索引副本数量和分片数量 Elasticsearch 7:查看所有索引 Elasticsearch 7:数据类型 Elasticsearch 7:字符串类型 keyword 、text Elasticsearch 7:数组 Elasticsearch 7:添加和更新文档 Elasticsearch 7:通过 _bulk 批量添加文档 Elasticsearch 7:使用 from 、size 进行分页查询 Elasticsearch 7:查询中使用 sort 进行排序 Elasticsearch 7:查询结果只展示部分字段 Elasticsearch 7:查询结果中展示 _version 字段 Elasticsearch 7:使用 ignore_above 限制字符串长度 Elasticsearch 7:动态映射 Elasticsearch 7:doc_values 属性 Elasticsearch 7:刷新周期 refresh_interval Elasticsearch 7:使用 _refresh 刷新索引 Elasticsearch 7:分片(shard)限制 Elasticsearch 7:使用 _cat thread_pool 查询线程池运行情况 Elasticsearch 7:事务日志 translog Elasticsearch 7:文档 _id 的长度限制 Elasticsearch 7:分片 shard Elasticsearch 7:滚动查询 Elasticsearch 7:聚合查询 Elasticsearch 7:索引模板 Elasticsearch 7:获取文档所属的 shard Elasticsearch 7:获取版本号 Elasticsearch 7:获取指定 shard 中的文档 Elasticsearch 7:获取 shard 统计信息 Elasticsearch 7:搜索实战 Elasticsearch 7:Python 客户端 Elasticsearch 7:Java TransportClient API 客户端 Elasticsearch 7:Java REST Client API 客户端 Elasticsearch:将 SQL 转换为 DSL Elasticsearch 6 快速上手 Elasticsearch 5 快速上手 Elasticsearch 5:禁止自动创建索引 Elasticsearch 5:禁止动态增加字段 Elasticsearch 产品版本支持周期 基于 Elasticsearch 的站内搜索引擎实战

Elasticsearch 7:创建和删除索引


#Elasticsearch


以下指令,在 kibana dev tools 执行。

创建索引

假设索引名是 movie :

PUT movie

响应:

{
  "acknowledged" : true,
  "shards_acknowledged" : true,
  "index" : "movie"
}

查看索引信息

GET movie

响应:

{
  "movie" : {
    "aliases" : { },
    "mappings" : { },
    "settings" : {
      "index" : {
        "creation_date" : "1572843447230",
        "number_of_shards" : "1",
        "number_of_replicas" : "1",
        "uuid" : "AzEtRiBaQqO5JDN_l7WG-w",
        "version" : {
          "created" : "7020099"
        },
        "provided_name" : "movie"
      }
    }
  }
}

创建索引时指定 mapping 和 settings

PUT movie
{
  "mappings" : {
    "properties" : {
      "name" : {
        "type" : "keyword"
      }
    }
  },
  "settings" : {
    "index" : {
      "number_of_shards" : 1,
      "number_of_replicas" : 2
    }
  }
}

创建文档时自动创建索引

当向一个不存在的索引中写入文档时,会自动创建索引。

POST student/_doc/1
{
  "name": "张三"
}

删除索引

DELETE movie

响应:

{
  "acknowledged" : true
}

如果在删除之后,再次删除,会因为找不到索引而报错:

{
  "error" : {
    "root_cause" : [
      {
        "type" : "index_not_found_exception",
        "reason" : "no such index [movie]",
        "resource.type" : "index_or_alias",
        "resource.id" : "movie",
        "index_uuid" : "_na_",
        "index" : "movie"
      }
    ],
    "type" : "index_not_found_exception",
    "reason" : "no such index [movie]",
    "resource.type" : "index_or_alias",
    "resource.id" : "movie",
    "index_uuid" : "_na_",
    "index" : "movie"
  },
  "status" : 404
}

删除后再次使用 GET movie 查询索引信息,会报错:

{
  "error" : {
    "root_cause" : [
      {
        "type" : "index_not_found_exception",
        "reason" : "no such index [movie]",
        "resource.type" : "index_or_alias",
        "resource.id" : "movie",
        "index_uuid" : "_na_",
        "index" : "movie"
      }
    ],
    "type" : "index_not_found_exception",
    "reason" : "no such index [movie]",
    "resource.type" : "index_or_alias",
    "resource.id" : "movie",
    "index_uuid" : "_na_",
    "index" : "movie"
  },
  "status" : 404
}

( 本文完 )