[Gluster-users] glusterfs performance tuning

[André Bauer]

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
André

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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