翻译或纠错本页面

分片 >
分片参考文献

分片参考文献¶

On this page

Sharding Methods in the mongo Shell
分片数据库命令
参考文档

Sharding Methods in the `mongo` Shell¶

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()`	检测 `mongo` 终端连接的是否为一个 `mongos` 示例.
`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()`	返回一个布尔值,报告当前是否有均衡器在进行数据块的迁移.
`sh.getBalancerState()`	Returns a boolean to report if the balancer is currently enabled.
`sh.help()`	Returns help text for the `sh` methods.
`sh.isBalancerRunning()`	打开或关闭在 shards 间迁移数据块的 balancer .
`sh.moveChunk()`	Migrates a chunk in a sharded cluster.
`sh.removeShardTag()`	使用特定的 shard key 值,将一个已经存在的 chunk 分成两部分.
`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()`	内部命令,等待指定的 sharded cluster 分布锁.
`sh.stopBalancer()`	内部命令,(等待来自集群中一个 `mongos` 发来的ping状态的改变.)
`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.

分片数据库命令¶

以下的命令支持集群.

名字	描述
`flushRouterConfig`	Forces an update to the cluster metadata cached by a `mongos`.
`addShard`	在 sharded cluster 中增加一个 shard.
`balancerStart`	Starts a balancer thread.
`balancerStatus`	Returns information on the balancer status.
`balancerStop`	Stops the balancer thread.
`cleanupOrphaned`	移除不属于某个分片却存储在这个分片的数据.
`checkShardingIndex`	验证片键上索引有效性的内部命令.
`enableSharding`	Enables sharding on a specific database.
`listShards`	返回配置服务器中的分片列表
`removeShard`	开始删除一个分片的过程.
`getShardMap`	报告集群状态的内部命令.
`getShardVersion`	Internal command that returns the config server version.
`mergeChunks`	可以合并在一个分片上的数据块.
`setShardVersion`	设置配置服务器上数据块版本的内部命令.
`shardCollection`	Enables the sharding functionality for a collection, allowing the collection to be sharded.
`shardingState`	Reports whether the `mongod` is a member of a sharded cluster.
`unsetSharding`	在MongoDB部署中影响实例间连接的内部命令.
`split`	创建一个新的 chunk.
`splitChunk`	分裂数据块的内部命令,使用 `sh.splitFind()` 和 `sh.splitAt()` 进行替代.
`splitVector`	决定分裂点的内部命令.
`medianKey`	废弃非内部命令,参见 `splitVector`.
`moveChunk`	在分片间迁移数据块的内部命令.
`movePrimary`	在将某个分片从集群中删除时,重新设置 primary shard .
`isdbgrid`	确认一个实例是否为 `mongos`.
`addShardToZone`	Associates a shard with a zone. Supports configuring zones in sharded clusters.
`removeShardFromZone`	Removes the association between a shard and a zone. Supports configuring zones in sharded clusters.
`updateZoneKeyRange`	Adds or removes the association between a range of sharded data and a zone. Supports configuring zones in sharded clusters.

参考文档¶

Operational Restrictions: Requirement for deploying a sharded cluster
排除集群故障: Common strategies for troubleshooting sharded cluster deployments.
Config Database: Complete documentation of the content of the local database that MongoDB uses to store sharded cluster metadata.

← Convert a Replica Set to a Sharded Cluster Operational Restrictions in Sharded Clusters →

Report a Problem