From: Justin Piszcz <jpiszcz@lucidpixels.com>
To: xfs@oss.sgi.com
Cc: linux-kernel@vger.kernel.org
Subject: 2.6.38.4: xfs speed problem?
Date: Sat, 7 May 2011 12:09:46 -0400 (EDT) [thread overview]
Message-ID: <alpine.DEB.2.02.1105071042210.20162@p34.internal.lan> (raw)
Hello,
Using 2.6.38.4 on two hosts:
Host 1:
$ /usr/bin/time find geocities.data 1> /dev/null
80.92user 417.93system 2:19:07elapsed 5%CPU (0avgtext+0avgdata 105520maxresident)k
0inputs+0outputs (0major+73373minor)pagefaults 0swaps
# xfs_db -c frag -f /dev/sda1
actual 40203982, ideal 40088075, fragmentation factor 0.29%
meta-data=/dev/sda1 isize=256 agcount=44, agsize=268435455 blks
= sectsz=512 attr=2
data = bsize=4096 blocks=11718704640, imaxpct=5
= sunit=0 swidth=0 blks
naming =version 2 bsize=4096 ascii-ci=0
log =internal bsize=4096 blocks=521728, version=2
= sectsz=512 sunit=0 blks, lazy-count=1
realtime =none extsz=4096 blocks=0, rtextents=0
--
Host 2:
$ /usr/bin/time find geocities.data 1>/dev/null
54.60user 337.20system 48:42.71elapsed 13%CPU (0avgtext+0avgdata 105632maxresident)k
0inputs+0outputs (1major+72981minor)pagefaults 0swaps
# xfs_db -c frag -f /dev/sdb1
actual 37998306, ideal 37939331, fragmentation factor 0.16%
meta-data=/dev/sdb1 isize=256 agcount=10, agsize=268435455 blks
= sectsz=512 attr=2
data = bsize=4096 blocks=2441379328, imaxpct=5
= sunit=0 swidth=0 blks
naming =version 2 bsize=4096 ascii-ci=0
log =internal bsize=4096 blocks=521728, version=2
= sectsz=512 sunit=0 blks, lazy-count=1
realtime =none extsz=4096 blocks=0, rtextents=0
--
Host 1: RAID-6 (7200 RPM Drives, 18+1 hot spare)
Host 2: RAID-6 (7200 RPM Drives, 12)
Each system uses a 3ware 9750-24i4e controller, same settings.
Any thoughts why one is > 2x faster than the other?
Justin.
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next reply other threads:[~2011-05-07 16:06 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-05-07 16:09 Justin Piszcz [this message]
2011-05-08 0:33 ` 2.6.38.4: xfs speed problem? Dave Chinner
2011-05-08 17:18 ` Stan Hoeppner
2011-05-09 7:53 ` Michael Monnerie
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