elasearch 版本控制

http://192.168.32.81:9200/library/books/8/
                              GET

{

    "_index": "library",
    "_type": "books",
    "_id": "8",
    "_version": 1,
    "found": true,
    "_source": {
        "titile": "Elasticsearch: The Defintive Guide",
        "name": {
            "first": "Zachary",
            "last": "Tong"
        },
        "publish_date": "2016-07-29",
        "price": "90.01"
    }

}

此时版本为  "_version": 1,

http://192.168.32.81:9200/library/books/8/

_update                               POST

{
  "doc":{
      "price":"11.13"}
 }

{

    "_index": "library",
    "_type": "books",
    "_id": "8",
    "_version": 2,
    "found": true,
    "_source": {
        "titile": "Elasticsearch: The Defintive Guide",
        "name": {
            "first": "Zachary",
            "last": "Tong"
        },
        "publish_date": "2016-07-29",
        "price": "11.13"
    }

}

此时版本变为2