[ovirt-users] Storage Performance

[Bryan Sockel]

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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