Sharding Commands

Sharding Commands

Note

For details on specific commands, including syntax and examples,click on the specific command to go to its reference page.

Name	Description
`addShard`	Adds a shard to a sharded cluster.
`addShardToZone`	Associates a shard with a zone. Supports configuring zones in sharded clusters.
`balancerStart`	Starts a balancer thread.
`balancerStatus`	Returns information on the balancer status.
`balancerStop`	Stops the balancer thread.
`checkShardingIndex`	Internal command that validates index on shard key.
`cleanupOrphaned`	Removes orphaned data with shard key values outside of the ranges of the chunks owned by a shard.
`enableSharding`	Enables sharding on a specific database.
`flushRouterConfig`	Forces a `mongod`/`mongos` instance to update its cached routing metadata.
`getShardMap`	Internal command that reports on the state of a sharded cluster.
`getShardVersion`	Internal command that returns the config server version.
`isdbgrid`	Verifies that a process is a `mongos`.
`listShards`	Returns a list of configured shards.
`medianKey`	Deprecated internal command. See `splitVector`.
`moveChunk`	Internal command that migrates chunks between shards.
`movePrimary`	Reassigns the primary shard when removing a shard from a sharded cluster.
`mergeChunks`	Provides the ability to combine chunks on a single shard.
`removeShard`	Starts the process of removing a shard from a sharded cluster.
`removeShardFromZone`	Removes the association between a shard and a zone. Supports configuring zones in sharded clusters.
`setShardVersion`	Internal command to sets the config server version.
`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.
`split`	Creates a new chunk.
`splitChunk`	Internal command to split chunk. Instead use the methods `sh.splitFind()` and `sh.splitAt()`.
`splitVector`	Internal command that determines split points.
`unsetSharding`	Internal command that affects connections between instances in a MongoDB deployment.
`updateZoneKeyRange`	Adds or removes the association between a range of sharded data and a zone. Supports configuring zones in sharded clusters.