From: George Shuklin <shuklin@selectel.ru>
To: ceph-devel@vger.kernel.org
Subject: Ceph write performance
Date: Fri, 20 Jul 2012 14:24:15 +0400 [thread overview]
Message-ID: <500931CF.9040407@selectel.ru> (raw)
Good day.
I've start to play with Ceph... And I found some kinda strange
performance issues. I'm not sure if this is due ceph limitation or my
bad setup.
Setup:
osd - xfs on ramdisk (only one osd)
mds - raid0 on 10 disks
mon - second raid0 on 10 disks
I've mount ceph share at localhost and run FIO (randwrite, 4k, iodepth=32)
What I've got: 1900 IOPS on writing (4k block, 1Gb span).
Normally fio shows about 200kIOPS writing on ramdisk.
Why it was so slow? I've done setup exactly like described here:
http://ceph.com/docs/master/start/quick-start/#start-the-ceph-cluster
(but one osd).
Thanks.
next reply other threads:[~2012-07-20 10:24 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-07-20 10:24 George Shuklin [this message]
[not found] ` <20120720104150.GA16630@oder.kd-bie.de>
2012-07-20 10:48 ` Ceph write performance George Shuklin
2012-07-20 11:49 ` Mark Nelson
2012-07-20 20:36 ` Ceph write performance on RAM-DISK Dieter Kasper
2012-07-20 21:28 ` Mark Nelson
2012-07-20 15:53 ` Ceph write performance Matthew Richardson
2012-07-20 16:37 ` Gregory Farnum
2012-08-28 17:48 ` RBD performance - tuning hints Dieter Kasper
2012-08-28 18:53 ` Smart Weblications GmbH - Florian Wiessner
2012-08-28 19:04 ` Dieter Kasper
2012-08-29 8:50 ` Alexandre DERUMIER
2012-08-29 17:37 ` Josh Durgin
2012-08-29 19:29 ` RBD performance - tuning hints / parameter doc Dieter Kasper
2012-08-29 22:34 ` Samuel Just
2012-08-30 15:08 ` Dieter Kasper
2012-08-30 20:39 ` Samuel Just
2012-08-30 14:56 ` RBD performance - tuning hints Dieter Kasper
2012-08-30 15:28 ` Alexandre DERUMIER
2012-08-30 15:33 ` Dieter Kasper
2012-08-30 15:46 ` Alexandre DERUMIER
2012-08-30 16:02 ` Dieter Kasper
2012-08-30 16:12 ` Alexandre DERUMIER
2012-08-30 16:16 ` Josh Durgin
2012-08-31 7:46 ` Alexandre DERUMIER
2012-08-31 8:11 ` Dietmar Maurer
2012-08-31 8:48 ` Mark Kirkwood
2012-08-31 9:49 ` RBD performance - tuning hints / major slowdown effect(s) Dieter Kasper
2012-08-31 10:16 ` Mark Kirkwood
2012-08-31 10:58 ` RBD performance - tuning hints Jerker Nyberg
2012-08-30 16:48 ` Dieter Kasper
2012-08-30 18:10 ` Gregory Farnum
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