xfs
[Top] [All Lists]

2.6.38.4: xfs speed problem?

To: xfs@xxxxxxxxxxx
Subject: 2.6.38.4: xfs speed problem?
From: Justin Piszcz <jpiszcz@xxxxxxxxxxxxxxx>
Date: Sat, 7 May 2011 12:09:46 -0400 (EDT)
Cc: linux-kernel@xxxxxxxxxxxxxxx
User-agent: Alpine 2.02 (DEB 1266 2009-07-14)
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.

<Prev in Thread] Current Thread [Next in Thread>