[Gluster-users] Optimizing Gluster (gfapi) for high IOPS

[Josh Boon]

Thanks for those options. My machines tend to be self-healing rather frequently.  Doing a gluster volume heal VMARRAY info the file list cycles through most of my high IOPS machines

Also what's the best way to apply those options with out bricking the running VM's?  I just made a rough stab and took the cluster down. 

----- Original Message -----
From: "Vijay Bellur" <vbellur at redhat.com>
To: "Josh Boon" <gluster at joshboon.com>, "Nick Majeran" <nmajeran at gmail.com>
Cc: "Gluster-users at gluster.org List" <gluster-users at gluster.org>
Sent: Saturday, March 22, 2014 1:36:09 PM
Subject: Re: [Gluster-users] Optimizing Gluster (gfapi) for high IOPS

On 03/21/2014 09:50 PM, Josh Boon wrote:
> Hardware RAID 5 on SSD's using LVM formatted with XFS default options
> mounted with noatime
>
> Also I don't a lot of history for this current troubled machine but the
> sysctl additions don't appear to have made a significant difference

Performance tunables in [1] are normally recommended for qemu - 
libgfapi. The last two options are related to quorum and the remaining 
tunables are related to performance. It might be worth a check to see if 
these options help provide better performance.

Do you happen to know if self-healing was in progress when the machines 
stall?

-Vijay

[1] 
https://github.com/gluster/glusterfs/blob/master/extras/group-virt.example