[Gluster-users] GlusterFS as virtual machine storage

Gionatan Danti g.danti at assyoma.it
Wed Aug 23 16:51:55 UTC 2017

Il 23-08-2017 18:14 Pavel Szalbot ha scritto:
> Hi, after many VM crashes during upgrades of Gluster, losing network
> connectivity on one node etc. I would advise running replica 2 with
> arbiter.

Hi Pavel, this is bad news :(
So, in your case at least, Gluster was not stable? Something as simple 
as an update would let it crash?

> I once even managed to break this setup (with arbiter) due to network
> partitioning - one data node never healed and I had to restore from
> backups (it was easier and kind of non-production). Be extremely
> careful and plan for failure.

I would use VM locking via sanlock or virtlock, so a split brain should 
not cause simultaneous changes on both replicas. I am more concerned 
about volume heal time: what will happen if the standby node 
crashes/reboots? Will *all* data be re-synced from the master, or only 
changed bit will be re-synced? As stated above, I would like to avoid 
using sharding...


Danti Gionatan
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Assyoma S.r.l. - www.assyoma.it
email: g.danti at assyoma.it - info at assyoma.it
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