Upgrade MongoDB meta-data after binary upgrade I upgraded our MongoDB binaries from 2.2.5 to 2.4.9. I did not follow one of the considerations prior to upgrading:


To upgrade to 2.4, sharded clusters must upgrade following the meta-data upgrade procedure.


The reason, not that it matters, is because I didn't think it was needed since we do not have any sharded collections in our environment. So, instead of following the sharded cluster upgrade, I followed the replica set upgrade procedure.

My question is, can I successfully run the meta-data upgrade without having to rollback to 2.2.5?
If you are not using a sharded cluster the meta-data upgrade procedure from 2.2 to 2.4 is not required. It involves the config database which does not exist in a non-sharded environment.