I have two problems here. I have a replica 3 sharded volume, gluster
3.7.11 for VM Images.
Yesterday I stopped the volume and ran a md5sum on all the shards to
compare the 3 replicas. All 15 VM images were identical except for one
(vm-307). It has 2048 shards of which 8 differed.
volume heal info lists *no* files needing healed.
Two things concern me:
1. How did this happen? trust in gluster either keeping replica's sync'd
or knowing when they are not is crucial.
2. How do I force a heal of an individual file? I can find no
documentation as to this process or even if it is possible.
I do have one possible solution - delete the vm image and restore from
backup. Not ideal.
Notes:
- I did have a hard disk failure on a brick while testing. ZFS recovered
it with no errors.
- My testing was reasonably severe - server reboots and killing of the
gluster processes. All things that will happen in a cluster life time. I
was pleased with how well gluster handled them.
--
Lindsay Mathieson
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