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What happens when MongoDB syncs a replica set?
For an overview of MongoDB initial sync process, see the Replica Set Syncing section. Initial sync operations can impact the other members of the set and create additional traffic to the primary.
What’s the best way to sync data in MongoDB?
MongoDB provides two options for performing an initial sync: Restart the mongod with an empty data directory and let MongoDB’s normal initial syncing feature restore the data. This is the more simple option but may take longer to replace the data.
How to automatically sync a member of a replica set?
Restart the mongod with an empty data directory and let MongoDB’s normal initial syncing feature restore the data. This is the more simple option but may take longer to replace the data. See Automatically Sync a Member. Restart the machine with a copy of a recent data directory from another member in the replica set.
Where can I find a reference to MongoDB?
Complete documentation of the replica set configuration object returned by rs.conf (). Reference on the replica set protocol version. Replica set trouble shooting guide. Complete documentation of the content of the local database that mongod instances use to support replication. Reference for the replica set member states.
When to sync MongoDB to empty DATA directory?
Schedule the synchronization during a time of low usage or during a maintenance window. MongoDB provides two options for performing an initial sync: Restart the mongod with an empty data directory and let MongoDB’s normal initial syncing feature restore the data. This is the more simple option but may take longer to replace the data.
When to resume synchronization in MongoDB 4.4?
Starting in MongoDB 4.4, a secondary performing initial sync can attempt to resume the sync process if interrupted by a transient (i.e. temporary) network error, collection drop, or collection rename. The sync source must also run MongoDB 4.4 to support resumable initial sync.
How to create a new node in MongoDB?
Take snapshot of the data volume from the existing secondary server. Create a volume from the snapshot. Attach this volume to the New node. Mount it on the dbpath and assign the permissions. Make sure the mongod.conf has replica set and shard details. Start the mongodb on the new node. Add the new node to the replica set.