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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?

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  • I've decided to rollback to 2.2.5 and perform the, then move to 2.4.9.
    – Qub3r
    Commented Apr 22, 2014 at 13:31

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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.

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  • I wouldn't have posted the question if it wasn't a sharded cluster.
    – Qub3r
    Commented Apr 28, 2014 at 14:07

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