标签:bsp ict already status 一个 存在 类型 sha fail
一、版本号:
在es中每个文档都有一个版本号,默认情况下,版本号都是随着每次对该文档的修改或者删除自增的,当然你也可以自己指定。有了这个文档号,我们可以像mysql
乐观锁一样,用来进行控制字我们文档的更新,如果要更新的文档号与索引中的文档号不一致,那么es会拒绝该次操作。常用于事务的处理中。
url:PUT http://127.0.0.1:9200/myes/name/6?version=17&pretty/
参数:
{ "name":"zzq", "age":17 }
结果:
成功的结果
{ "_index": "myes", "_type": "name", "_id": "6", "_version": 18, "_shards": { "total": 2, "successful": 1, "failed": 0 }, "created": false }
失败的结果:
{ "error": { "root_cause": [ { "type": "version_conflict_engine_exception", "reason": "[name][6]: version conflict, current [18], provided [17]", "shard": "2", "index": "myes" } ], "type": "version_conflict_engine_exception", "reason": "[name][6]: version conflict, current [18], provided [17]", "shard": "2", "index": "myes" }, "status": 409 }
二:操作类型
系统支持通过 op_type=create命令执行创建操作,只有不存在此文档的时候才会创建。如果不指定类型,那么存在此文档就会更新。
url:PUT http://127.0.0.1:9200/myes/name/8?op_type=create&pretty/
参数:
{ "name":"zzq5", "age":17 }
结果:
{ "_index": "myes", "_type": "name", "_id": "8", "_version": 1, "_shards": { "total": 2, "successful": 1, "failed": 0 }, "created": true }
再次执行上述的链接,结果如下:
{ "error": { "root_cause": [ { "type": "document_already_exists_exception", "reason": "[name][8]: document already exists", "shard": "1", "index": "myes" } ], "type": "document_already_exists_exception", "reason": "[name][8]: document already exists", "shard": "1", "index": "myes" }, "status": 409 }
三、分片选择
默认情况下,分片的选择是通过ID的散列值进行控制的。这个只能通过 router参数进行手动控制(通过hash的值)
url:PUT http://127.0.0.1:9200/myes/name/?router=myes&pretty/
标签:bsp ict already status 一个 存在 类型 sha fail
原文地址:https://www.cnblogs.com/anxbb/p/9404301.html