From: Stefan Priebe - Profihost AG <s.priebe@profihost.ag>
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>
Subject: Re: slow fio random read benchmark, need help
Date: Thu, 01 Nov 2012 11:54:03 +0100 [thread overview]
Message-ID: <509254CB.1080604@profihost.ag> (raw)
In-Reply-To: <CAPYLRzi3i8C-uRyRKMgCxSag6ReANg+X5keSA43XGqbusrrRLQ@mail.gmail.com>
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 — Josh
> can talk about that more than I can, though!
> -Greg
Same results with rbd kernel driver without QEMU involved.
Stefan
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next prev parent reply other threads:[~2012-11-01 10:54 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-10-31 1:41 [PATCH 0/6] rbd: version 2 parent probing Alex Elder
2012-10-31 1:49 ` [PATCH 1/6] rbd: skip getting image id if known Alex Elder
2012-10-31 21:05 ` Josh Durgin
2012-10-31 1:49 ` [PATCH 2/6] rbd: allow null image name Alex Elder
2012-10-31 21:07 ` Josh Durgin
2012-10-31 1:49 ` [PATCH 3/6] rbd: get parent spec for version 2 images Alex Elder
2012-11-01 1:33 ` Josh Durgin
2012-10-31 1:49 ` [PATCH 4/6] libceph: define ceph_pg_pool_name_by_id() Alex Elder
2012-11-01 1:34 ` Josh Durgin
2012-10-31 1:49 ` [PATCH 5/6] rbd: get additional info in parent spec Alex Elder
2012-10-31 14:11 ` Alex Elder
2012-11-01 1:49 ` Josh Durgin
2012-11-01 12:18 ` Alex Elder
2012-10-31 1:50 ` [PATCH 6/6] rbd: probe the parent of an image if present Alex Elder
2012-10-31 11:59 ` slow fio random read benchmark, need help Alexandre DERUMIER
2012-10-31 15:57 ` Sage Weil
2012-10-31 16:29 ` Alexandre DERUMIER
2012-10-31 16:50 ` Alexandre DERUMIER
2012-10-31 17:08 ` Marcus Sorensen
2012-10-31 17:27 ` Alexandre DERUMIER
2012-10-31 17:38 ` Marcus Sorensen
2012-10-31 18:56 ` Alexandre DERUMIER
2012-10-31 19:50 ` Marcus Sorensen
2012-11-01 5:11 ` Alexandre DERUMIER
2012-11-01 5:41 ` Stefan Priebe - Profihost AG
2012-10-31 20:22 ` Josh Durgin
2012-11-01 7:38 ` Dietmar Maurer
2012-11-01 8:08 ` Stefan Priebe - Profihost AG
2012-11-01 10:40 ` Gregory Farnum
2012-11-01 10:54 ` Stefan Priebe - Profihost AG [this message]
2012-11-02 9:38 ` Alexandre DERUMIER
2012-11-03 10:01 ` slow fio random read benchmark: last librbd git : 20000iops ! Alexandre DERUMIER
2012-11-03 12:09 ` Alexandre DERUMIER
2012-11-01 15:46 ` slow fio random read benchmark, need help Marcus Sorensen
2012-11-01 16:28 ` Marcus Sorensen
2012-11-01 17:00 ` Dietmar Maurer
2012-11-03 17:09 ` Gregory Farnum
2012-11-04 14:54 ` Alexandre DERUMIER
2012-11-01 2:07 ` [PATCH 6/6] rbd: probe the parent of an image if present Josh Durgin
2012-11-01 12:26 ` Alex Elder
[not found] <CAMiztYLY364EXVQu6d6+He-FXd_AsDOqxkTO_DzKk24iJjwTcQ@mail.gmail.com>
2012-10-31 17:22 ` slow fio random read benchmark, need help Alexandre DERUMIER
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