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.
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