015-elasticsearch-搜索模板，多搜索模板，

Posted 2020-10-27 bjlhx

一、搜索模板

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二、多搜索模板

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三、搜索分片API

　　搜索分片api返回将执行搜索请求的索引和分片。这可以提供有用的反馈，用于解决问题或使用路由和分片首选项进行规划优化。使用过滤别名时，过滤器将作为索引部分的一部分返回。

　　索引和类型参数可以是单个值，也可以逗号分隔。

　　类型参数已弃用【5.1.0】

示例：

GET /twitter/_search_shards

{
  "nodes": ...,
  "indices" : {
    "twitter": { }
  },
  "shards": [
    [
      {
        "index": "twitter",
        "node": "JklnKbD7Tyqi9TP3_Q_tBg",
        "primary": true,
        "shard": 0,
        "state": "STARTED",
        "allocation_id": {"id":"0TvkCyF7TAmM1wHP4a42-A"},
        "relocating_node": null
      }
    ],
    [
      {
        "index": "twitter",
        "node": "JklnKbD7Tyqi9TP3_Q_tBg",
        "primary": true,
        "shard": 1,
        "state": "STARTED",
        "allocation_id": {"id":"fMju3hd1QHWmWrIgFnI4Ww"},
        "relocating_node": null
      }
    ],
    [
      {
        "index": "twitter",
        "node": "JklnKbD7Tyqi9TP3_Q_tBg",
        "primary": true,
        "shard": 2,
        "state": "STARTED",
        "allocation_id": {"id":"Nwl0wbMBTHCWjEEbGYGapg"},
        "relocating_node": null
      }
    ],
    [
      {
        "index": "twitter",
        "node": "JklnKbD7Tyqi9TP3_Q_tBg",
        "primary": true,
        "shard": 3,
        "state": "STARTED",
        "allocation_id": {"id":"bU_KLGJISbW0RejwnwDPKw"},
        "relocating_node": null
      }
    ],
    [
      {
        "index": "twitter",
        "node": "JklnKbD7Tyqi9TP3_Q_tBg",
        "primary": true,
        "shard": 4,
        "state": "STARTED",
        "allocation_id": {"id":"DMs7_giNSwmdqVukF7UydA"},
        "relocating_node": null
      }
    ]
  ]
}

View Code

指定相同的请求，这次使用路由值：

GET /twitter/_search_shards?routing=foo,baz

{
  "nodes": ...,
  "indices" : {
      "twitter": { }
  },
  "shards": [
    [
      {
        "index": "twitter",
        "node": "JklnKbD7Tyqi9TP3_Q_tBg",
        "primary": true,
        "shard": 0,
        "state": "STARTED",
        "allocation_id": {"id":"0TvkCyF7TAmM1wHP4a42-A"},
        "relocating_node": null
      }
    ],
    [
      {
        "index": "twitter",
        "node": "JklnKbD7Tyqi9TP3_Q_tBg",
        "primary": true,
        "shard": 1,
        "state": "STARTED",
        "allocation_id": {"id":"fMju3hd1QHWmWrIgFnI4Ww"},
        "relocating_node": null
      }
    ]
  ]
}

View Code

这次搜索只会针对两个分片执行，因为已经指定了路由值。

参数：

　　

routing	A comma-separated list of routing values to take into account when determining which shards a request would be executed against. 在确定要执行的请求分片时要考虑的路由值的逗号分隔列表。
preference	Controls a preference of which shard replicas to execute the search request on. By default, the operation is randomized between the shard replicas. See the preferencedocumentation for a list of all acceptable values. 控制哪个分片副本在其上执行搜索请求的首选项。默认情况下，该操作在碎片副本之间随机化。请参阅首选项文档以获取所有可接受值的列表。
local	A boolean value whether to read the cluster state locally in order to determine where shards are allocated instead of using the Master node’s cluster state. 一个布尔值，是否在本地读取群集状态以确定分配分片的位置，而不是使用主节点的群集状态。

四、建议功能

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五、多搜索API

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