Elasticsearch实战——索引管理

1. 索引创建

PUT index
{
    "settings":{
        "number_of_shards":3,
        "number_of_replicas":1
    },
    "mappings":{
        "properties":{
            "title":{
                "type":"text",
                "analyzer":"ik_max_words",
                "search_analyzer":"ik_smart"
            },
            "tag":{
                "type":"keyword"
            }
        }
    }
}

2. 添加字段

PUT index/_mapping
{
    "properties":{
        "indexAt":{
            "type":"date",
            "format":"yyyy-MM-dd HH:mm:ss"
        }
    }
}

3. 删除索引

DELETE index

4. 打开/关闭索引

4.1 打开索引

POST index/_open

4.2 关闭索引

POST index/_close

5. 重建索引

POST /_reindex
{
    "source":{
        "index":"sourceIndexName",
        "query":{
            
        },
        "sort":{
            "fieldName":"asc/desc"
        },
        "size":5000,
        "_source":[
            "fieldName1",
            "fieldName2",
            "fieldName3",
        ]
    },
    "dest":{
     	"index":"destIndexName",
        "version_type":"internal(default)/external",
        "op_type":"create"
    }
}

说明：

• version_type
  • internal：表示迁移全部数据，且完全覆盖冲突文档(即使目标文档版本新于源索引文档)。
  • external：表示迁移全部数据，且更新旧版本冲突文档。
• op_type：
  • create：表示仅创建目标索引不存在的文档。

6. 别名管理

6.1 添加别名

POST /_aliases
{
    "actions":[
        {
            "add":{
                "index":"indexName1",
                "alias":"aliasName"
            }
        },
        {
            "add":{
                "index":"indexName2",
                "alias":"aliasName"
            }
        }
    ]
}

6.2 删除别名

POST /_aliases
{
    "actions":[
        {
            "remove":{
                "index":"indexName",
                "alias":"aliasName"
            }
        }
    ]
}

6.3 重命名

POST /_aliases
{
    "actions":[
        {
            "remove":{
                "index":"indexName",
                "alias":"aliasName1"
            }
        },
        {
            "add":{
                "index":"indexName",
                "alias":"aliasName2"
            }
        }
    ]
}

7. 合并索引

POST index/_forcemerge?max_num_segments=1

8. 缩小索引

8.1 先把索引设置为只读

PUT source_index/_setting
{
    "settings":{
        "index.routing.allocation.require._name":"node-1",
        "index.blocks.write":true
    }
}

8.2 执行shrink

POST source_index/_shrink/target_index
{
    "settings":{
        "index.number_of_replicas":1,
        "index.number_of_shards":1,
        "index.codec":"best_compression"
    }
}