From: Stefan Priebe - Profihost AG <s.priebe@profihost.ag>
To: Alexandre DERUMIER <aderumier@odiso.com>
Cc: "Mark Nelson" <mark.nelson@inktank.com>,
ceph-devel <ceph-devel@vger.kernel.org>,
"Mark Kampe" <mark.kampe@inktank.com>,
"Sébastien Han" <han.sebastien@gmail.com>
Subject: Re: RBD fio Performance concerns
Date: Fri, 23 Nov 2012 11:49:10 +0100 [thread overview]
Message-ID: <50AF54A6.4040805@profihost.ag> (raw)
In-Reply-To: <c164551e-fb3d-4d4d-a750-33c032328fdb@mailpro>
Am 23.11.2012 11:47, schrieb Alexandre DERUMIER:
>>> when i switch the journal to the OSD Disk seperate partiton on each disk
>>> (/dev/sdX1 for journal 1GB and /dev/sdX2 for OSD) i go down from 23.000
>>> iops to 200 iops random 4k.
> O_o , that's seem crazy...
> Are you sure that your partitions are correctly aligned ? (starting first partition at sector 2048 is best for ssd)
Model: ATA INTEL SSDSC2CW24 (scsi)
Disk /dev/sdb: 468862128s
Sector size (logical/physical): 512B/512B
Partition Table: gpt
Number Start End Size File system Name Flags
1 2048s 2342911s 2340864s xfs pri
2 2342912s 468860927s 466518016s xfs pri
Stefan
next prev parent reply other threads:[~2012-11-23 10:49 UTC|newest]
Thread overview: 51+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <50A537EA.5090409@inktank.com>
[not found] ` <CAOLwVUmQa4C_vs_Mbi3b2LeO=wx8_EMVWX5Pyu0y-JnG8nyz+Q@mail.gmail.com>
2012-11-16 22:59 ` RBD fio Performance concerns Mark Kampe
2012-11-19 14:56 ` Sébastien Han
2012-11-19 15:28 ` Alexandre DERUMIER
2012-11-19 15:42 ` Sébastien Han
2012-11-19 16:44 ` Sage Weil
2012-11-19 16:54 ` Mark Kampe
2012-11-19 18:03 ` Sébastien Han
2012-11-19 19:11 ` Alexandre DERUMIER
2012-11-19 20:57 ` Sébastien Han
2012-11-20 7:32 ` Alexandre DERUMIER
2012-11-20 10:37 ` Sébastien Han
2012-11-21 15:52 ` Mark Nelson
2012-11-21 16:34 ` Mark Nelson
2012-11-21 21:47 ` Sébastien Han
2012-11-21 22:05 ` Mark Kampe
2012-11-22 5:46 ` Alexandre DERUMIER
2012-11-23 13:36 ` Chen, Xiaoxi
2012-11-24 16:59 ` Gregory Farnum
2012-11-22 10:19 ` Stefan Priebe - Profihost AG
[not found] ` <CAOLwVUmp7wrfead8qX2BZPbyeN_JY_XBN+wkEWmbY6q1-5u0fw@mail.gmail.com>
2012-11-22 11:48 ` Stefan Priebe - Profihost AG
2012-11-22 12:50 ` Sébastien Han
2012-11-22 13:14 ` Stefan Priebe - Profihost AG
[not found] ` <CAOLwVUkwVSv-Ven2CTjnTN2J573TBTD2SLDY7df0h7ncJZQgpQ@mail.gmail.com>
2012-11-22 13:29 ` Stefan Priebe - Profihost AG
2012-11-22 14:20 ` Alexandre DERUMIER
2012-11-22 14:22 ` Stefan Priebe - Profihost AG
2012-11-22 14:37 ` Mark Nelson
2012-11-22 14:42 ` Stefan Priebe - Profihost AG
2012-11-22 14:46 ` Mark Nelson
2012-11-22 15:01 ` Stefan Priebe - Profihost AG
2012-11-22 15:26 ` Alexandre DERUMIER
2012-11-22 15:28 ` Stefan Priebe - Profihost AG
2012-11-22 15:35 ` Alexandre DERUMIER
2012-11-22 15:49 ` Sébastien Han
2012-11-22 15:54 ` Stefan Priebe - Profihost AG
2012-11-22 15:55 ` Sébastien Han
2012-11-22 15:57 ` Stefan Priebe - Profihost AG
2012-11-22 15:59 ` Stefan Priebe - Profihost AG
2012-11-22 14:52 ` Alexandre DERUMIER
2012-11-22 15:00 ` Stefan Priebe - Profihost AG
2012-11-23 10:31 ` Stefan Priebe - Profihost AG
2012-11-23 10:47 ` Alexandre DERUMIER
2012-11-23 10:49 ` Stefan Priebe - Profihost AG [this message]
2012-11-23 11:03 ` Alexandre DERUMIER
2012-11-23 13:12 ` Stefan Priebe - Profihost AG
2012-11-23 13:18 ` Mark Nelson
2012-11-23 13:24 ` Stefan Priebe - Profihost AG
2012-11-23 13:32 ` Alexandre DERUMIER
2012-11-23 13:33 ` Stefan Priebe - Profihost AG
2012-11-23 13:43 ` Stefan Priebe - Profihost AG
2012-11-22 14:34 ` Mark Nelson
[not found] ` <50AA763A.1050709@inktank.com>
2012-11-19 21:01 ` Sébastien Han
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