[pve-devel] ceph performance

[Alexandre DERUMIER]

>>But if that is used for osd flush, that would explain the slow iops? 

I have also "slow" performance on read. :(

5000iops for 1 guest, but it seem to scale with multiple guests.

----- Mail original ----- 

De: "Dietmar Maurer" <dietmar at proxmox.com> 
À: "Alexandre DERUMIER" <aderumier at odiso.com> 
Cc: pve-devel at pve.proxmox.com 
Envoyé: Lundi 5 Novembre 2012 07:01:21 
Objet: RE: [pve-devel] ceph performance 

> >>I'm not sure, I known that it can impact performance on osd, but not sure 
> about the client. 
> 
> I Confirm, it's only for the osd and data flushes 

But if that is used for osd flush, that would explain the slow iops? 

> 
> https://github.com/ceph/ceph/commit/07498d66233f388807a458554640cb7 
> 7424114c0 
> (But If One day we want to support ceph on promox host, I think We'll need 
> to backport libc6) 

or modify the ceph package to directly use the syscall?