On 1 March 2017 at 09:20, Ernie Dunbar <[email protected]> wrote:
> 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. Hi Ernie, sorry saw your question before and meant to reply but "stuff" kept happening ... :) 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. nb. What is your raid controller? network setup? 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. 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. -- Lindsay
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