From mboxrd@z Thu Jan  1 00:00:00 1970
From: Stefan Priebe - Profihost AG <s.priebe@profihost.ag>
Subject: Re: slow fio random read benchmark, need help
Date: Thu, 01 Nov 2012 11:54:03 +0100
Message-ID: <509254CB.1080604@profihost.ag>
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To: Gregory Farnum <greg@inktank.com>
Cc: Dietmar Maurer <dietmar@proxmox.com>, Josh Durgin <josh.durgin@inktank.com>, Alexandre DERUMIER <aderumier@odiso.com>, Marcus Sorensen <shadowsor@gmail.com>, Sage Weil <sage@inktank.com>, ceph-devel <ceph-devel@vger.kernel.org>

Am 01.11.2012 11:40, schrieb Gregory Farnum:
> I'm not sure that latency addition is quite correct. Most use cases
> cases do multiple IOs at the same time, and good benchmarks tend to
> reflect that.
>
> I suspect the IO limitations here are a result of QEMU's storage
> handling (or possibly our client layer) more than anything else =97 J=
osh
> can talk about that more than I can, though!
> -Greg

Same results with rbd kernel driver without QEMU involved.

Stefan
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