[ovirt-users] Storage Performance

[Juan Pablo]

Hi, can you check IOPS? and state # of VM's ? do : iostat -x 1 for a while
=)

Isnt RAID discouraged ? AFAIK gluster likes JBOD, am I wrong?


regards,
JP

2017-10-25 12:05 GMT-03:00 Bryan Sockel <Bryan.Sockel at altn.com>:

> Have a question in regards to storage performance.  I have a gluster
> replica 3 volume that we are testing for performance.  In my current
> configuration is 1 server has 16X1.2TB( 10K 2.5 Inch) drives configured in
> Raid 10 with a 256k stripe.  My 2nd server is configured with 4X6TB (3.5
> Inch Drives) configured Raid 10 with a 256k stripe.  Each server is
> configured with 802.3 Bond (4X1GB) network links.  Each server is
> configured with write-back on the raid controller.
>
> I am seeing a lot of network usage (solid 3 Gbps) when i perform file
> copies on the vm attached to that gluster volume,  But i see spikes on the
> disk io when watching the dashboard through the cockpit interface.  I
> spikes are up to 1.5 Gbps, but i would say the average through put is maybe
> 256 Mbps.
>
> Is this to be expected, or should it be a solid activity in the graphs for
> disk IO.  Is it better to use a 256K stripe or a 512 strip on the hardware
> raid configuration?
>
> Eventually i plan on having the hardware match up for better performance.
>
>
> Thanks
>
> Bryan
>
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