Replication Reference

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Replication Methods in the `mongo` Shell

Name	Description
`rs.add()`	Adds a member to a replica set.
`rs.addArb()`	Adds an arbiter to a replica set.
`rs.conf()`	Returns the replica set configuration document.
`rs.freeze()`	Prevents the current member from seeking election as primary for a period of time.
`rs.help()`	Returns basic help text for replica set functions.
`rs.initiate()`	Initializes a new replica set.
`rs.printReplicationInfo()`	Prints a formatted report of the replica set status from the perspective of the primary.
`rs.printSecondaryReplicationInfo()`	Prints a formatted report of the replica set status from the perspective of the secondaries.
`rs.printSlaveReplicationInfo()`	Deprecated since version 4.4.1: Use `rs.printSecondaryReplicationInfo()` instead.
`rs.reconfig()`	Re-configures a replica set by applying a new replica set configuration object.
`rs.remove()`	Remove a member from a replica set.
`rs.secondaryOk()`	Allows read operations on secondary members for the MongoDB connection.
`rs.status()`	Returns a document with information about the state of the replica set.
`rs.stepDown()`	Causes the current primary to become a secondary which forces an election.
`rs.syncFrom()`	Sets the member that this replica set member will sync from, overriding the default sync target selection logic.

Name	Description
`applyOps`	Internal command that applies oplog entries to the current data set.
`hello`	Displays information about this member's role in the replica set, including whether it is the primary.
`isMaster`	Deprecated. Use `db.hello()` instead.
`replSetAbortPrimaryCatchUp`	Forces the elected primary to abort sync (catch up) then complete the transition to primary.
`replSetFreeze`	Prevents the current member from seeking election as primary for a period of time.
`replSetGetConfig`	Returns the replica set's configuration object.
`replSetGetStatus`	Returns a document that reports on the status of the replica set.
`replSetInitiate`	Initializes a new replica set.
`replSetMaintenance`	Enables or disables a maintenance mode, which puts a secondary node in a `RECOVERING` state.
`replSetReconfig`	Applies a new configuration to an existing replica set.
`replSetResizeOplog`	Dynamically resizes the oplog for a replica set member. Available for WiredTiger storage engine only.
`replSetStepDown`	Forces the current primary to step down and become a secondary, forcing an election.
`replSetSyncFrom`	Explicitly override the default logic for selecting a member to replicate from.

Replica Set Configuration: Complete documentation of the replica set configuration object returned by rs.conf().
Replica Set Protocol Version: Reference on the replica set protocol version.
Troubleshoot Replica Sets: Replica set trouble shooting guide.
The local Database: Complete documentation of the content of the local database that mongod instances use to support replication.
Replica Set Member States: Reference for the replica set member states.

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Rename a Replica Set

Replica Set Configuration