Replication Craziness

Brad Fitzpatrick brad at danga.com
Tue Jun 19 16:59:34 UTC 2007


What's your layout look like?  Number of hosts, devices, etc?  Want to
paste here the output of various "mogadm" commands?

On Tue, 19 Jun 2007, Russell Garrett wrote:

> We've been having some rather strange happenings with MogileFS (2.16)
> replication recently. We're seeing loads of files being replicated to
> silly devcounts (up to 27) - most of them on the same host.
>
> Our cluster is mostly full, so replicated files are lingering in
> file_to_replicate due to them being sub-optimally replicated (all on one
> host), but when the replication job gets to them, it seems to replicate
> them again anyway (to yet another device on the same least-used host),
> when it should just pass until more disks become available.
>
> I can't see any obvious problems, though, and it's really fiddly to
> debug on this live installation...
>
> Cheers,
>
> Russ Garrett
> Last.fm Ltd.
> russ at last.fm
>
>


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