William Kern
2016-Mar-29 18:42 UTC
[Gluster-users] How beefy does an arbiter box have to be?
We have a few replica 2 clusters using Gluster 3.4 for various projects. They have worked very well, but we always had to be careful about split brain when doing maintenance or in the event of a failure. So now we are looking to do a forklift upgrade to 3.7.x and add Arbiter box(s) into the new setup (i.e replica 2 + arbiter) Can we get away with using some older machines from the bone pile (i.e core2 cpu 2/4GB) or should we be using proper server kit? Would SSDs on the arbiter help or are they even necessary? Note: we are still using 1G (jumbo mtu) networking as the 10G stuff hasn't trickled down to our group yet <grin>. That is why we are mostly interested in using Arbiter rather than a true replica 3 environment. -wk
Ravishankar N
2016-Mar-30 01:33 UTC
[Gluster-users] How beefy does an arbiter box have to be?
On 03/30/2016 12:12 AM, William Kern wrote:> We have a few replica 2 clusters using Gluster 3.4 for various projects. > > They have worked very well, but we always had to be careful about > split brain when doing maintenance or in the event of a failure. > > So now we are looking to do a forklift upgrade to 3.7.x and add > Arbiter box(s) into the new setup (i.e replica 2 + arbiter) > > Can we get away with using some older machines from the bone pile (i.e > core2 cpu 2/4GB) or should we be using proper server kit? > Would SSDs on the arbiter help or are they even necessary?Not an authoritative answer but I think it should be manageable. I don't think SSDs for arbiter alone (and not the other 2 bricks of the replica) would improve performance in any way because we don't do read() or write() on the files of the arbiter brick. Another option would be to reserve a brick on the existing nodes itself when creating a volume. (Sorry, converting an existing replica 2 volume to arbiter is not yet supported but is on the cards.) -Ravi> > Note: we are still using 1G (jumbo mtu) networking as the 10G stuff > hasn't trickled down to our group yet <grin>. That is why we are > mostly interested in using Arbiter rather than a true replica 3 > environment. > > -wk > _______________________________________________ > Gluster-users mailing list > Gluster-users at gluster.org > http://www.gluster.org/mailman/listinfo/gluster-users