Re: poor OSD performance using kernel 3.4

[Stefan Priebe - Profihost AG <s.priebe@profihost.ag>]

Am 29.05.2012 23:45, schrieb Yann Dupont:
> Le 29/05/2012 23:34, Stefan Priebe a écrit :
>> Am 29.05.2012 23:31, schrieb Yann Dupont:
>>> on the contrary, pool data is jumping up & down, no matter how much
>>> thread involved :)
>>>
>>> Maybe this is because journal is too tight ? Or because 2 of the 8 nodes
>>> have slower disks ?
>> Can you try with 3.0.X? I would be really interested what happens in
>> this case.
>>
>> Stefan
> hum...
> probably not directly. Older btrfs won't like big metadata, I think.
> This is quite a recent feature.
That's absolutely correct. If you test 3.0.X i think its better to use
XFS. I'm just interested if the problem we both see is gone for you too
with 3.0.X.

> I'll take the latest 3.0 kernel - or do you have a particular 3.0 kernel
> version to test ?
I've used the latest 3.0.X stable (.32 right now)

> And Do you want a particular xfs/btrfs format ?
mkfs.xfs is enough ;-)

Thanks!

Stefan
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