1 手动移动shard到指定节点

src node : 172.18.58.108 nodename 0kJKhMq9TuSBbYCOjkh1Gw indexName call_record primaryshard 0

destination node : 172.18.58.107 nodename 7YS_Dv6pSR-dwCe9CQ1baA

10 seconds

Last 1 hour

POST /_cluster/reroute
{
  "commands": [
    {
      "move": {
        "index": "call_record", "shard": 0,
        "from_node": "0kJKhMq9TuSBbYCOjkh1Gw", "to_node": "7YS_Dv6pSR-dwCe9CQ1baA"
      }
    }
  ]
}

172.18.58.98 VaSwze4-SR646yN4O7rlxw v2_course_progress

172.18.58.249 9AKXOM_sT06SKs7UbYyvHg

POST /_cluster/reroute
{
  "commands": [
    {
      "move": {
        "index": "v2_course_progress", "shard": 4,
        "from_node": "VaSwze4-SR646yN4O7rlxw", "to_node": "9AKXOM_sT06SKs7UbYyvHg"
      }
    }
  ]
}

2 重建索引

# 只读
PUT v2_course_progress/_settings
{
  "index": {
    "blocks.read_only": true
  }
}


*#* 确认只读生效
GET v2_course_progress/_settings



*#* 记录原始文档数
GET v2_course_progress/_count



*#* 重建索引 todo:增加batch的步长
POST _reindex?wait_for_completion=false
{
  "source": {
    "index": "v2_course_progress"
  },
  "dest": {
    "index": "v3_course_progress"
  }
}

*#*确认新索引文档数
GET v3_course_progress/_count


*#* 取消只读
PUT v2_course_progress/_settings
{
  "index": {
    "blocks.read_only": false
  }
}
*#* 修改原有的索引别名

POST /_aliases
{
    "actions" : [
        { "remove" : { "index" : "v2_course_progress", "alias" : "course_progress" } },
        { "add" : { "index" : "v2_course_progress", "alias" : "unuse_course_progress" } }
    ]
}

*#*启用新索引
POST /_aliases
{
    "actions" : [
        { "add" : { "index" : "v3_course_progress", "alias" : "course_progress" } }
    ]
}



//返回 task
"task" : "bwWAKYnqR_y14q_KQxhB0g:25317045"

//查看task状态
GET /_tasks/bwWAKYnqR_y14q_KQxhB0g:25317045

//取消task
POST _tasks/task_id:1/_cancel

*#*  确认新索引正常工作之后 再删除旧索引
DELETE v2_course_progress

添加新的字段 与修改原有字段的属性

create index


PUT student
{
  "mappings": {
    "doc": {
      "properties": {
        "timestamp": {
          "type": "date"
        },
        "name": {
          "type": "text"
        },
        "age":{
          "type": "long"
        }
      }
    }
  }
}


#1: add  keyword

PUT student/_mapping/_doc
{
  "properties": {
    "age": {
      "type": "long",
      "fields": {
        "keyword": {
          "type": "keyword",
          "ignore_above": 256
        }
      }
    }
  }
}


#2 add new field

PUT student/_mapping/_doc
{
  "properties": {
    "summary": {
      "type": "text"
    }
  }
}

3修改索引副本数

PUT base_index/_settings
{
    "number_of_replicas": 1
}```