Replica Set Maintenance Tutorials

The following tutorials provide information in maintaining existing replica sets.

Change the Size of the Oplog

Increase the size of the oplog which logs operations. In most cases, the default oplog size is sufficient.

Perform Maintenance on Replica Set Members

Perform maintenance on a member of a replica set while minimizing downtime.

Force a Member to Become Primary

Force a replica set member to become primary.

Resync a Member of a Replica Set

Sync the data on a member. Either perform initial sync on a new member or resync the data on an existing member that has fallen too far behind to catch up by way of normal replication.

Configure Replica Set Tag Sets

Assign tags to replica set members for use in targeting read and write operations to specific members.

Reconfigure a Replica Set with Unavailable Members

Reconfigure a replica set when a majority of replica set members are down or unreachable.

Manage Chained Replication

Disable or enable chained replication. Chained replication occurs when a secondary replicates from another secondary instead of the primary.

Change Hostnames in a Replica Set

Update the replica set configuration to reflect changes in members' hostnames.

Configure a Secondary's Sync Target

Specify the member that a secondary member synchronizes from.

Rename a Replica Set

Rename an unsharded replica set.

Modify PSA Replica Set Safely

Safely perform some reconfiguration changes on a primary-secondary-arbiter (PSA) replica set or on a replica set that is changing to a PSA architecture.

Mitigate Performance Issues with PSA Replica Set

Reduce cache pressure and increased write traffic for a deployment that has a three-member primary-secondary-arbiter (PSA) architecture.