Re: poor OSD performance using kernel 3.4

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Am 29.05.2012 15:39, schrieb Yann Dupont:
> On 29/05/2012 11:46, Stefan Priebe - Profihost AG wrote:
>> It would be really nice if somebody from inktank can comment this whole
>> sitation.
>>
> Hello.
> I think I have the same bug :
> 
> My setup is with 8 OSD nodes, 3 MDS (1 active) & 3 MON.
> All my machines are debian, using a custom 3.4.0 kernel. Ceph is
> 0.47.2-1~bpo60+1 (debian package)

That sounds absolutely like the same issue. Sadly nobody from inktank
has replied to this problems for the last days.

> As you can see, much more stable bandwith with this pool.
That's pretty strange...

> I understand data & rbd pool probably don't use the same internals, but
> is this difference expected ?

There must be differences in pool handling.

Stefan
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