Want to do an incremental backup for mongodb. Journaling? Oplog?

Question

I want to daily backups for a single mongodb database, probably with mongodump. To not lose any data, I would like this to be incremental so if something goes wrong in the m

Answer 1

MongoDB doesn't provide an incremental backup option out of the box, but it's possible to do a file snapshot and replay the oplog. Did you set up your server as a replica set following the steps outlined in the documentation? http://www.mongodb.org/display/DOCS/Replica+Sets+-+Basics

Could you also tell us the purpose of these backups? Have you considered adding a second node to your replica set for data durability?

If you've walked through the steps to set up the server as a member of a replica set, can you run rs.status() in the shell?

One other note (just to clarify)- journaling is not meant to be a backup strategy; journaling merely ensures that the database can return to a consistent state in the event of failover. Running with journaling enabled is highly recommended.

Here is the MongoDB documentation for backups: http://www.mongodb.org/display/DOCS/Backups

Answer 2

The best way to do the backups is to configure Ops Manager as part of your MongoDB infrastructure, but it does so much more than just backups...