[ovirt-users] Storage Performance

[FERNANDO FREDIANI]

That was my impression too, but unfortunately someone told in this mail 
list recently that Gluster isn't that clever to work without RAID 
Controllers and when disks fail it imposes some difficulties for 
replacement. Perhaps someone with more knowledge could clarify this 
point which certainly is beneficial to people.

Fernando


On 26/10/2017 10:59, Juan Pablo wrote:
> 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 
> <mailto: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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