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- Sharded Cluster Behavior
Sharded Cluster Behavior¶
These documents address the distribution of data and queries to a sharded cluster as well as specific security and availability considerations for sharded clusters.
- Shard Keys
- MongoDB uses the shard key to divide a collection’s data across the cluster’s shards.
- Sharded Cluster High Availability
- Sharded clusters provide ways to address some availability concerns.
- Sharded Cluster Query Routing
- The cluster’s routers, or
mongos
instances, send reads and writes to the relevant shard or shards.