Sharded Cluster Maintenance Tutorials¶

The following tutorials provide information in maintaining sharded clusters.

View Cluster Configuration: View status information about the cluster’s databases, shards, and chunks.
Replace a Config Server: Replace a config server in a config server replica set.
Migrate Config Servers with the Same Hostname: For a sharded cluster with three mirrored config servers, migrate a config server to a new system while keeping the same hostname. This procedure requires changing the DNS entry to point to the new system.
Migrate Config Servers with Different Hostnames: For a sharded cluster with three mirrored config servers, migrate a config server to a new system that uses a new hostname. If possible, avoid changing the hostname and instead use the Migrate Config Servers with the Same Hostname procedure.
Migrate a Sharded Cluster to Different Hardware: Migrate a sharded cluster to a different hardware system, for example, when moving a pre-production environment to production.
Backup Cluster Metadata: Create a backup of a sharded cluster’s metadata while keeping the cluster operational.
Configure Behavior of Balancer Process in Sharded Clusters: Manage the balancer’s behavior by scheduling a balancing window, changing size settings, or requiring replication before migration.
Manage Sharded Cluster Balancer: View balancer status and manage balancer behavior.
Remove Shards from an Existing Sharded Cluster: Migrate a single shard’s data and remove the shard.