Re: RBD fio Performance concerns

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Am 22.11.2012 13:50, schrieb Sébastien Han:
journal is running on tmpfs to me but that changes nothing.

I don't think it works then. According to the doc: Enables using
libaio for asynchronous writes to the journal. Requires journal dio
set to true.

Ah might be but as the SSDs are pretty fast i don't know which device to use as journal except tmpfs.

And RAMDISK devices are too expensive.

Greets,
Stefan

On Thu, Nov 22, 2012 at 12:48 PM, Stefan Priebe - Profihost AG
<s.priebe@xxxxxxxxxxxx> wrote:
Am 22.11.2012 11:49, schrieb Sébastien Han:

@Alexandre: cool!

@ Stefan: Full SSD cluster and 10G switches?

Yes


Couple of weeks ago I saw
that you use journal aio, did you notice performance improvement with it?

journal is running on tmpfs to me but that changes nothing.

Stefan
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