sh.shardCollection()

sh.shardCollection(collection, key, unique)

参数:

• collection (string) – The namespace of the collection to shard.
• key (document) – A document containing a shard key that the sharding system uses to partition and distribute objects among the shards.
• unique (boolean) – When true, the unique option ensures that the underlying index enforces uniqueness so long as the unique index is a prefix of the shard key.

Shards the named collection, according to the specified shard key. Specify shard keys in the form of a document. Shard keys may refer to a single document field, or more typically several document fields to form a “compound shard key.”

See

Size of Sharded Collection

• <   sh.setBalancerState()
• /\  参考
• sh.splitAt()  >