Hi, I believe it is not that simple. Even replica 2 + arbiter volume with default network.ping-timeout will cause the underlying VM to remount filesystem as read-only (device error will occur) unless you tune mount options in VM's fstab. -ps On Wed, Aug 23, 2017 at 6:59 PM, <lemonnierk@xxxxxxxxx> wrote: > What he is saying is that, on a two node volume, upgrading a node will > cause the volume to go down. That's nothing weird, you really should use > 3 nodes. > > On Wed, Aug 23, 2017 at 06:51:55PM +0200, Gionatan Danti wrote: >> 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... >> >> Thanks. >> >> >> -- >> Danti Gionatan >> Supporto Tecnico >> Assyoma S.r.l. - www.assyoma.it >> email: g.danti@xxxxxxxxxx - info@xxxxxxxxxx >> GPG public key ID: FF5F32A8 >> _______________________________________________ >> Gluster-users mailing list >> Gluster-users@xxxxxxxxxxx >> http://lists.gluster.org/mailman/listinfo/gluster-users > > _______________________________________________ > Gluster-users mailing list > Gluster-users@xxxxxxxxxxx > http://lists.gluster.org/mailman/listinfo/gluster-users _______________________________________________ Gluster-users mailing list Gluster-users@xxxxxxxxxxx http://lists.gluster.org/mailman/listinfo/gluster-users
