[大数据]ES通过reindex修改mapping

ES通过reindex修改mapping

例如此处需要将age属性由keyword 改为integer

1.查询需要修改的索引的mapping

GET test_index/_mapping
#result 

{
  "test_index" : {
    "mappings" : {
      "_doc" : {
        "properties" : {
          "age" : {
            "type" : "keyword"
          }
        }
      }
    }
  }

2. 创建与此索引相同mapping的副本索引

PUT test_index_new
{
  "test_index_new" : {
    "mappings" : {
      "_doc" : {
        "properties" : {
          "age" : {
            "type" : "keyword"
          }
        }
      }
    }
  }

3.索引数据迁移

POST _reindex
{
  "source": {
    "index": "test_index"
  },
  "dest": {
    "index": "test_index_new"
  }
}

4.删除旧的索引

DELETE test_index

5.创建旧索引，并重新配置maaping

PUT test_index
{
  "test_index" : {
    "mappings" : {
      "_doc" : {
        "properties" : {
          "age" : {
            "type" : "integer"  // 改为新类型integer
          }
        }
      }
    }
  }

6.将数据迁移到修改mapping后的索引上

POST _reindex
{
  "source": {
    "index": "test_index_new"
  },
  "dest": {
    "index": "test_index"
  }
}

7.删掉创建的新索引

新索引主要用来保存数据

DELETE test_index_new

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