[pve-devel] less cores more iops / speed

[Alexandre DERUMIER]

>>Doesn't make any difference. But i'm now at 18.000 iops ;-) 

Read and writes ?  do you have found your write cpu problem ?

----- 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 11:08:18 
Objet: Re: [pve-devel] less cores more iops / speed 

Am 09.11.2012 11:01, schrieb Alexandre DERUMIER: 
> do you have tried fio with --numjobs option ? (I'll make more fio threads I think, maybe set it to the number of cpu you have) 

Doesn't make any difference. But i'm now at 18.000 iops ;-) 

> ----- Mail original ----- 
> 
> De: "Stefan Priebe - Profihost AG" <s.priebe at profihost.ag> 
> À: "Dietmar Maurer" <dietmar at proxmox.com> 
> Cc: "Alexandre DERUMIER" <aderumier at odiso.com>, pve-devel at pve.proxmox.com 
> Envoyé: Vendredi 9 Novembre 2012 10:06:45 
> Objet: Re: [pve-devel] less cores more iops / speed 
> 
> I'm pinnin inside the kvm process the fio process. SO it shouldn't be a 
> problem of librbd alone. 
> 
> Stefan 
> Am 09.11.2012 09:59, schrieb Dietmar Maurer: 
>>> Am 09.11.2012 09:50, schrieb Dietmar Maurer: 
>>>>>> It's try to keep process on same numa node and I think it's also 
>>>>>> doing some 
>>>>> dynamic pinning. 
>>>>> 
>>>>> numad doesn't help but libvirt seems to support pinning of kvm instances. 
>>>>> Maybe pve should support pinning too? 
>>>> 
>>>> So far I never had such problems. 
>>>> 
>>>> IMHO, Manual pinning is the wrong way. 
>>> 
>>> But doing heavy I/O with 8 Cores is much slower than with 2 Cores that can't 
>>> be correct... 
>> 
>> What exactly is the suggestion? So far only rbd client shows such behavior? 
>>