bulk 批量操作-实现多个文档的创建、索引、更新和删除
------------------------------------------------------------------------------
1、命令格式
{action:{metadata}}
{request body}
{action:{metadata}}
{request body}
其中，action的值有 createindexupdatedelete
create:当文档不存在时创建之
index:创建或替换已有文档
update:局部更新文档
delete:删除一个文档
例如：{“delete”：{“_index”:"library","_type":"books","_id":"1"}}
------------------------------------------------------------------------------
2、举例如下
请求命令：
POST /library/books/_bulk
{"index":{"_id":1}}
{"title":"The Elasticsearch cook book","price":5}
{"index":{"_id":2}}
{"title":"Thinking in python","price":25}
{"index":{"_id":3}}
{"title":"Thinking in java","price":15}
执行结果：
{
“took”:528,
“errors”:false,
"items":
{
"index":{
"_index":"library",
"_type":"book",
"_id":"1",
"_version":1,
"status":201
}
},
"index":{
"_index":"library",
"_type":"book",
"_id":"2",
"_version":1,
"status":201
}
},
"index":{
"_index":"library",
"_type":"book",
"_id":"3",
"_version":1,
"status":201
}
},
"index":{
"_index":"library",
"_type":"book",
"_id":"4",
"_version":1,
"status":201
}
}
}
检查命令：
GET /library
GET /library/books/_mget
{
"ids":["1","2","3","4","5"]
}
------------------------------------------------------------------------------
3、还可以delete、update，但delete没有request body
------------------------------------------------------------------------------
4、批量处理文档的大小最佳值
需要验证得知
可以借助插件监控的仪表数据判断