重点

• 数据写入后，并不是马上可以search到，需要refresh（index.refresh_interval 默认1s）
• refresh
  • empty string or true
  • wait_for
  • false (the default)
• optimistic concurrency control
  • sequence number（_seq_no） 通过该字段确保 旧数据 不会覆盖 新数据
  • _seq_no: index全局自增
  • _primary_term: 指定存储主分片
  • _version: 该索引的版本号，默认每次修改都会自增

refresh

  GET /twitter/_search
  {
    "query": {
      "match_all": {}
    }
  }
  
  PUT /twitter/_doc/1?refresh
  {
    "fullname": "zhengcj01",
    "text":"hello"
  }
  
  PUT /twitter/_doc/2?refresh=true
  {
    "fullname": "dongyc",
    "text":"how do you do"
  }
  
  PUT /twitter/_doc/3
  {
    "fullname": "liuhh",
    "text":"hello"
  }
  PUT /twitter/_doc/4?refresh=false
  {
    "fullname": "zhengzj",
    "text":"how do you do"
  }
  
  PUT /twitter/_doc/5?refresh=wait_for
  {
    "fullname": "zhengwj",
    "text":"how do you do"
  }

optimistic concurrency control

PUT products/_doc/1567?if_seq_no=362&if_primary_term=2
{
    "product" : "r2d2",
    "details" : "A resourceful astromech droid",
    "tags": ["droid"]
}

最后

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