[pve-devel] less cores more iops / speed
Alexandre DERUMIER
aderumier at odiso.com
Fri Nov 9 11:01:12 CET 2012
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)
----- 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?
>
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