How does MogileFS handle failure?

dormando dormando at
Wed Apr 4 20:11:10 UTC 2007

You must monitor your devices yourself (with nagios, etc), and if you 
are _sure_ that disk is dead, mark the device as dead via mogadm.

Once the device is marked 'dead', MogileFS will internally clean off the 
device and re-replicate files that were on the now dead drive.

At gaiaonline we're running a 7 terabyte MogileFS installation. 8 
trackers, 33 hosts, ~45 drives. Over 25 million files tracked. Seems to 
work well enough :)


rlucindo wrote:
> Hello,
> I didn't find in MogileFS's documentation how it deals with disk failure. If I configured MogileFS to have at least two copies of each file and a disk fail occur (and is impossible to recovery using fsck), how Reaper work to handle this situation? A device can automatically get the dead status?
> Anyone here has the experience with MogileFS running on commodity hardware (big installations)?
> Thanks
> []'s
> Lucindo
> --
> "Programming is an unnatural act" -
> Alan J. Perlis

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