[pve-devel] less cores more iops / speed

[Stefan Priebe]

Am 09.11.2012 15:43, schrieb Alexandre DERUMIER:
>>> 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.
Yes at least it scales. Sadly only 3000 iops... but each node has a 
capacity of 360.000 iops... perhaps a bit overkill... but SSDs are near 
cheap as SAS drives...

> Did you have tested with gigabit link with bigger latencies ?
No. But i hope i can compare Arista 10G against HP 10G soon.

Stefan


> ----- 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
>