Force replication restructure

Rob madcamel at
Wed Nov 7 01:39:53 UTC 2007

You were completely correct. Thanks.
An fsck is all it took, mogilefsd is now shuffling things around wonderfully.

On Nov 6, 2007 3:35 PM, dormando <dormando at> wrote:
> Rob wrote:
> > I started my MogileFS "cluster" with just a single storage node.
> > I just added two more storage nodes, and am looking for a way to force
> > re-replication of it's files to the other nodes. Improve redundancy
> > and load distribution, etc. What is the recommended way to go about
> > this?
> >
> > I was thinking either flag the devices on the first node as down
> > (slowly, one at a time), or increase the replication count for my
> > classes, wait for replication to complete, then put it back to normal.
> >
> What's your devcount set to?
> Since previously the hostcount was 1, I'd recommend first running a
> 'fsck' - which will find policy violations and re-replicate files. I'm
> almost sure if you have a devcount of at least 2 on the class for those
> files, and they're stuck on one host, it'll cause a policy violation and
> make an extra copy.
> Instead of marking devices as down (which doesn't actually do anything)
> or dead, you can mark them as 'drain' one by one, which shouldn't affect
> the system's ability to actually find and replicate the data. This may
> be optional, run a fsck first and see what happens ;)
> -Alan


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