<div dir="ltr"><div class="gmail_extra"><br><div class="gmail_quote">On 1 March 2017 at 09:20, Ernie Dunbar <span dir="ltr"><<a href="mailto:maillist@lightspeed.ca" target="_blank">maillist@lightspeed.ca</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Every node in the Gluster array has their RAID array configured
as RAID5, so I'd like to improve the performance on each node by
changing that to RAID0 instead. </blockquote></div><br></div><div class="gmail_extra">Hi Ernie, sorry saw your question before and meant to reply but "stuff" kept happening ... :)<br><br></div><div class="gmail_extra">Presuming you're running Replica 3 I don't see any issues with converting from RAID5 to RAID0, there should be quite a local performance boost and I would think its actually safer - the rebuild times for RAID5 are horrendous and a performance killer to boot. With RAID0 you'll loose the whole brick if you lose a disk but depending on your network, healing from the other nodes would probably be quicker.<br><br></div><div class="gmail_extra">nb. What is your raid controller? network setup?<br><br></div><div class="gmail_extra">Alternatively I believe the general recommendation is to actually run all your disks in JBOD mode and create a brick per disk, that way individual disk failures won't effect the other bricks on the node. However that would require the same number of disks per node.<br><br></div><div class="gmail_extra">For myself, I actually run 4 disks per node, setup as RAID10 with ZFS. One ZFS Pool and Brick per node. I use it for VM Hosting though which is quite a different usecase, a few very large files.<br></div><div class="gmail_extra"><br clear="all"><br>-- <br><div class="gmail_signature" data-smartmail="gmail_signature">Lindsay</div>
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