In my experience, the ovirt optimized defaults are fairly sane. I may change a few things like enabling read ahead or increasing the shard size, but these are minor performance bumps if anything.


The most important thing is the underlying storage, RAID 10 is ideal performance wise, large stripe sizes are preferable for VM workloads, etc... You want the underlying storage to be as fast as possible, dedicated cache devices are a plus. IOPS and latency are often more important that throughput.


Network throughput and latency are also very important. I don't think i would attempt a gluster setup on anything slower than 10GbE, jumbo frames are a huge help, switches with large buffers are nice as well. Do not L3 route gluster (at least not inter-server links) unless you have a switch that can do line rate routing. High or inconsistent network latency will bring gluster to it's knees.


Kernel tuning / gluster volume options do help, but they are not groundbreaking performance improvements. Usually just little speed boosts here and there.


On 2020-10-21 12:30, eevans@digitaldatatechs.com wrote:

 

Here is the post link:

https://lists.ovirt.org/archives/list/users@ovirt.org/thread/I62VBDYPQIWPRE3LKUUVSLHPZJVQBT4X/

 

Here is the actual link:

https://docs.gluster.org/en/latest/Administrator%20Guide/Linux%20Kernel%20Tuning/

 

 

Eric Evans

Digital Data Services LLC.

304.660.9080

 

From: suporte@logicworks.pt <suporte@logicworks.pt>
Sent: Wednesday, October 21, 2020 11:47 AM
To: eevans@digitaldatatechs.com
Cc: users <users@ovirt.org>
Subject: Re: [ovirt-users] Improve glusterfs performance

 

Thanks.

 

But I don't find anything on how to imporve gluster.

 

José

 

De: eevans@digitaldatatechs.com
Para: suporte@logicworks.pt, "users" <users@ovirt.org>
Enviadas: Quarta-feira, 21 De Outubro de 2020 15:53:00
Assunto: RE: [ovirt-users] Improve glusterfs performance

 

I posted a link in the users list that details how to improve gluster and improve performance. Search gluster.

 

Eric Evans

Digital Data Services LLC.

304.660.9080

 

From: suporte@logicworks.pt <suporte@logicworks.pt>
Sent: Wednesday, October 21, 2020 9:42 AM
To: users <users@ovirt.org>
Subject: [ovirt-users] Improve glusterfs performance

 

Hello,

 

Can anyone help me in how can I improve the performance of glusterfs to work with oVirt?

 

Thanks

 

--

Jose Ferradeira
http://www.logicworks.pt

 




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