From: Stefan Priebe <s.priebe@profihost.ag>
To: "ceph-devel@vger.kernel.org" <ceph-devel@vger.kernel.org>
Subject: massive 4k random read drop with next branch
Date: Sat, 27 Apr 2013 22:13:33 +0200 [thread overview]
Message-ID: <517C316D.6030205@profihost.ag> (raw)
Hello list,
today i was testing next branch against bobtail using a testcluster. I
upgraded this bobtail one to next branch.
I used QEMU 1.4.1 with librdb (for next branch i applied josh writeback
patch). My Testsystem had 5 Hosts with one OSD each and set replication
to 2.
All values where done with 8 jobs in parallel using fio in Qemu Guest.
bobtail:
rand 4k: write: io=164316KB, bw=1783KB/s, iops=445, runt= 92136msec
rand 4k: read : io=1117MB, bw=12710KB/s, iops=3177, runt= 90028msec
seq 4m: write: io=8588MB, bw=97233KB/s, iops=23, runt= 90444msec
seq 4m: read : io=83616MB, bw=951227KB/s, iops=232, runt= 90013msec
next branch:
write: io=177236KB, bw=1963KB/s, iops=490, runt= 90284msec
read : io=223628KB, bw=2408KB/s, iops=601, runt= 92875msec
write: io=25936MB, bw=294443KB/s, iops=71, runt= 90199msec
read : io=69856MB, bw=794585KB/s, iops=193, runt= 90025msec
Greets,
Stefan
next reply other threads:[~2013-04-27 20:13 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-04-27 20:13 Stefan Priebe [this message]
2013-04-27 20:45 ` massive 4k random read drop with next branch Mark Nelson
2013-04-28 12:21 ` Stefan Priebe - Profihost AG
2013-04-28 12:24 ` Mark Nelson
2013-04-27 21:14 ` Wido den Hollander
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=517C316D.6030205@profihost.ag \
--to=s.priebe@profihost.ag \
--cc=ceph-devel@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.