[pve-devel] less cores more iops / speed

[Alexandre DERUMIER]

Maybe one last question (sorry ;)

Do you have tried to launch 2 fio test from 2 differents kvm host at the same time ?

If yes, do you have more io or do you have half of speed on each fio test ?



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

De: "Alexandre DERUMIER" <aderumier at odiso.com> 
À: "Stefan Priebe - Profihost AG" <s.priebe at profihost.ag> 
Cc: pve-devel at pve.proxmox.com 
Envoyé: Vendredi 9 Novembre 2012 15:43:47 
Objet: Re: [pve-devel] less cores more iops / speed 

>>To me yes. With 3 Nodes i had a max of 10.000 iops. 

Ah, great to known ! 

so around 3000 iops by node, I hope It'll improve in time. 

Did you have tested with gigabit link with bigger latencies ? 




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

De: "Stefan Priebe - Profihost AG" <s.priebe at profihost.ag> 
À: "Alexandre DERUMIER" <aderumier at odiso.com> 
Cc: pve-devel at pve.proxmox.com, "Dietmar Maurer" <dietmar at proxmox.com> 
Envoyé: Vendredi 9 Novembre 2012 15:28:12 
Objet: Re: [pve-devel] less cores more iops / speed 

Am 09.11.2012 11:31, schrieb Alexandre DERUMIER: 
>>> Yes. CPU Load in Ceph for rand. 4k writes can be dropped by 50% when 
>>> disabling all debug setting (see my last post on ceph mailinglist). 
> 
> I just see it, great,I'll test it on my side :) 
> 
> (how many ssds - nodes ?) I hope that Intank is working on random io performance. 
I have 5 nodes with 4 SSDs each. 

> I don't understand why we can't get more iops, if they are no cpu or disks bottleneck... (or they are locks somewhere ....) 
> 
> I really would like to known if iops scale with the number of nodes... 

To me yes. With 3 Nodes i had a max of 10.000 iops. 

Stefan 
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