From: Alexandre DERUMIER <aderumier@odiso.com>
To: Mark Nelson <mark.nelson@inktank.com>
Cc: ceph-devel@vger.kernel.org
Subject: Re: 10/14/2014 Weekly Ceph Performance Meeting
Date: Wed, 15 Oct 2014 08:22:11 +0200 (CEST) [thread overview]
Message-ID: <e1f8eda8-3711-4f50-8910-20a09daa472f@mailpro> (raw)
In-Reply-To: <543DECC6.9030607@redhat.com>
Hi,
about performance, maybe could it be great to also include client side performance ?
Currently I see 2 performance problems with librbd:
1) The cpu usage is quite huge. (I'm cpu bound with 8cores CPU E5-2603 v2 @ 1.80GHz, with 40000iops 4k read using fio-rbd)
2) in qemu, it's impossible to reach more than around 7000iops with 1 disk. (maybe is it also related to cpu or threads number).
I have also try with the new qemu iothread/dataplane feature, but it doesn't help.
next prev parent reply other threads:[~2014-10-15 6:22 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-10-15 3:40 10/14/2014 Weekly Ceph Performance Meeting Mark Nelson
2014-10-15 6:22 ` Alexandre DERUMIER [this message]
2014-10-15 13:26 ` Mark Nelson
2014-10-15 14:42 ` Alexandre DERUMIER
2014-10-15 15:54 ` Alexandre DERUMIER
2014-10-15 16:04 ` Alexandre DERUMIER
2014-10-16 3:27 ` Chen, Xiaoxi
2014-10-16 6:25 ` Alexandre DERUMIER
2014-10-16 6:53 ` Chen, Xiaoxi
2014-10-23 21:53 ` Sage Weil
2014-10-23 22:06 ` Milosz Tanski
2014-10-15 15:50 ` Matt W. Benjamin
2014-10-15 15:58 ` Mark Nelson
2014-10-15 16:44 ` Matt W. Benjamin
-- strict thread matches above, loose matches on Subject: below --
2014-10-17 5:58 Zhang, Jian
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