[Gluster-users] Peer isolation while healing

WK wkmail at bneit.com
Mon Oct 9 18:08:02 UTC 2017

You have replica2 so you can't really take 50% of your cluster down 
without turning off quorum (and risking split brain). So detaching the 
rebuilding peer is really not an option.

If you had replica3 or an arbiter, you CAN detach or isolate the problem 
peer.  I've done things like change the Gluster network IP on the 'bad' 
peer to help speed up a RAID6 rebuild, that wasn't happy with the 
gluster heal process going on at the same time.

Your data will still be available and fully functional on the remaining 
peer (though you lost redundancy)

Then once the raid rebuild had caught up, you could return the peer to 
the cluster and do a final 'heal'.


On 10/9/2017 2:32 AM, ML wrote:
> Hi everyone,
> I've been using gluster for a few month now, on a simple 2 peers 
> replicated infrastructure, 22Tb each.
> One of the peers has been offline last week during 10 hours (raid 
> resync after a disk crash), and while my gluster server was healing 
> bricks, I could see some write errors on my gluster clients.
> I couldn't find a way to isolate my healing peer, in the documentation 
> or anywhere else.
> Is there a way to avoid that ? Detach the peer while healing ? Some 
> tunning on the client side maybe ?
> I'm using gluster 3.9 on debian 8.
> Thank you for your help.
> Quentin
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