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- mongo Shell Methods >
- 分片方法
分片方法¶
注解
For details on specific methods, including syntax and examples, click on the specific method to go to its reference page.
名字 |
描述 |
|---|---|
| sh._adminCommand() | 在admin数据库运行 database command ,就像 db.runCommand() ,不过可以保证只在 mongos 上运行. |
| sh.getBalancerLockDetails() | Reports on the balancer lock. |
| sh._checkFullName() | Tests a namespace to determine if its well formed. |
| sh._checkMongos() | |
| sh._lastMigration() | 报告最后进行的 chunk 迁移. |
| sh.addShard() | 向集群中添加一个 shard |
| sh.addShardTag() | 将一个分片与一个标记相关联,用以支持 标记相关的分片. |
| sh.addShardToZone() | 将片键的范围与某个标记相关联,用以支持 标记相关的分片. |
| sh.addTagRange() | In MongoDB 3.4, this method aliases to sh.updateZoneKeyRange(). |
| sh.updateZoneKeyRange() | 禁用一个分片数据库中某个集合的均衡过程,这并不影响这个分片数据库中其他分片的均衡过程. |
| sh.removeTagRange() | 如果之前使用了命令 sh.disableBalancing() 禁用了某个集合的均衡过程,这个命令将重新启用均衡过程. |
| sh.removeRangeFromZone() | Removes an association between a range of shard keys and a zone. Supports configuring zones in sharded clusters. |
| sh.disableBalancing() | Disable balancing on a single collection in a sharded database. Does not affect balancing of other collections in a sharded cluster. |
| sh.enableBalancing() | Activates the sharded collection balancer process if previously disabled using sh.disableBalancing(). |
| sh.enableSharding() | Enables sharding on a specific database. |
| sh.getBalancerHost() | Deprecated since MongoDB 3.4 |
| sh.getBalancerState() | Returns a boolean to report if the balancer is currently enabled. |
| sh.help() | Returns help text for the sh methods. |
| sh.isBalancerRunning() | |
| sh.moveChunk() | Migrates a chunk in a sharded cluster. |
| sh.removeShardTag() | |
| sh.removeShardFromZone() | 将包含查询文档的一个已经存在的 chunk 分成两个差不多大小的数据块. |
| sh.setBalancerState() | Enables or disables the balancer which migrates chunks between shards. |
| sh.shardCollection() | 就像 db.printShardingStatus() 一样,返回 sharded cluster 的状态信息. |
| sh.splitAt() | Divides an existing chunk into two chunks using a specific value of the shard key as the dividing point. |
| sh.splitFind() | Divides an existing chunk that contains a document matching a query into two approximately equal chunks. |
| sh.startBalancer() | Enables the balancer and waits for balancing to start. |
| sh.status() | Reports on the status of a sharded cluster, as db.printShardingStatus(). |
| sh.stopBalancer() | Disables the balancer and waits for any in progress balancing rounds to complete. |
| sh.waitForBalancer() | Internal. Waits for the balancer state to change. |
| sh.waitForBalancerOff() | Internal. Waits until the balancer stops running. |
| sh.waitForDLock() | Internal. Waits for a specified distributed sharded cluster lock. |
| sh.waitForPingChange() | Internal. Waits for a change in ping state from one of the mongos in the sharded cluster. |