1.并发控制
es 的并发控制是通过多version来实现的(不清楚乐观锁的自己提升去)
2.实例
//创建索引
PUT /test_index/test_type/7
{"test_field": "test test"
}//返回创建结果GET test_index/test_type/7{"_index": "test_index","_type": "test_type","_id": "7","_version": 1,"found": true,"_source": {"test_field": "test test"}
}******* 根据版本号来更新索引****************
PUT /test_index/test_type/7?version=1
{"test_field": "test client 1"
}//返回结果
{"_index": "test_index","_type": "test_type","_id": "7","_version": 2,"result": "updated","_shards": {"total": 2,"successful": 1,"failed": 0},"created": false
}******另外一个客户端，尝试基于version=1的数据去进行修改，同样带上version版本号，进行乐观锁的并发控制