[Gluster-users] glusterfs performance tuning

bernhard glomm
Thu, 18 Dec 2014 15:15:55 -0000

thnx for sharing Andr?!
so in ubuntu 14.04 we can use libgfapi without recompiling qemu?
it works just out of the box (as described in your first link)?
Regards
Bernhard



> Hi Bernhard,
>
> i have nearly the same setup:
> - Ubuntu 14.04.
> - 4 nodes (relplicate distributed)
> - bricks are on lvm on a mdadm raid 10
>
> used bonding (802.3ad/bond-mode 4) before but did not see real benefit
> in speed for vms. depending on what you do 1 gb might be already enough.
> nevertheless we bought 10 ge hardware now
>
> For the vms i recommend to use libgfapi which will have better
> performance and the load of your gluster nodes will go down:
>
>
http://www.gluster.org/community/documentation/index.php/Libgfapi_with_qemu_libvirt
>
> I also used these hints:
>
http://www.gluster.org/community/documentation/index.php/Virt-store-usecase#Tunables
>
> Whats also important:
>
http://joejulian.name/blog/keeping-your-vms-from-going-read-only-when-encountering-a-ping-timeout-in-glusterfs/
>
> Regards
> Andr?
>
> Am 18.12.2014 um 12:39 schrieb Bernhard Glomm:
>> hi all,
>>
>> I'm looking for some performance tuning suggestions for glusterfs.
>>
>> The set is:
>> - 2 server with several bricks each (ubuntu 14.04),
>> - each brick is part of a 2way-mirror between them both
>> - both server are connected with 2 * 1GB NIC
>> - the servers also mount the gluster volumes (fuse)
>> - each gluster volume hosts mainly a single large file (10-20GB)
(VM-Image),
>>  sometimes two or three of them
>>
>> My qustions:
>> - Which bond mode would you recommend for this set up?
>> - what are performance parameters/values for "few large files per
gluster volume"
>> - are there some performance parameters regarding the use as vm.image
storage
>>   (the vms do some caching by themself?)
>>
>> TIA
>>
>> Bernhard
>>
>>
>>
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>
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