GFS2 performance
 

Hi,
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I’m trying to get more performance out of my DRBD cluster with gfs2.
It seems that our gfs2 implementation is quit slow.
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When running the ping_pong test we get no more than a 1000 locks/sec on the disk.
./ping_pong /mnt/backup/test.dat 4
879 locks/sec
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The cluster config has been updated with:
Â*Â*Â*Â*Â*Â*Â* <dlm plock_ownership="1" plock_rate_limit="0"/>
Â*Â*Â*Â*Â*Â*Â* <gfs_controld plock_rate_limit="0"/>
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gfs2_tool getargs /mnt/backup
statfs_percent 0
data 2
suiddir 0
quota 0
posix_acl 0
upgrade 0
debug 0
localflocks 0
localcaching 0
ignore_local_fs 0
spectator 0
hostdata jid=1:id=2752514:first=0
locktable
lockproto
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gfs2_tool df -H
/mnt/backup:
Â* SB lock proto = "lock_dlm"
Â* SB lock table = "cybercenter:backup"
Â* SB ondisk format = 1801
Â* SB multihost format = 1900
Â* Block size = 4096
Â* Journals = 2
Â* Resource Groups = 7451
Â* Mounted lock proto = "lock_dlm"
Â* Mounted lock table = "cybercenter:backup"
Â* Mounted host data = "">
Â* Journal number = 1
Â* Lock module flags = 0
Â* Local flocks = FALSE
Â* Local caching = FALSE
Â*
Â* TypeÂ*Â*Â*Â*Â*Â*Â*Â*Â*Â* TotalÂ*Â*Â*Â*Â*Â*Â*Â*Â* UsedÂ*Â*Â*Â*Â*Â*Â*Â*Â*Â* FreeÂ*Â*Â*Â*Â*Â*Â*Â*Â*Â* use%Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*
Â*Â*------------------------------------------------------------------------
Â* dataÂ*Â*Â*Â*Â*Â*Â*Â*Â*Â* 3TÂ*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â* 1TÂ*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â* 1TÂ*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â* 47%
Â* inodesÂ*Â*Â*Â*Â*Â*Â*Â* 1TÂ*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â* 96MÂ*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â* 1TÂ*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â*Â* 0%
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Hdparm information of the disk:
hdparm -tT /dev/sdb
/dev/sdb:
Timing cached reads:Â*Â* 20988 MB inÂ* 2.00 seconds = 10512.28 MB/sec
Timing buffered disk reads:Â*Â* 74 MB inÂ* 3.05 seconds =Â* 24.30 MB/sec
Â*
Â*
Has someone an idea about increasing the performance of my gfs2 filesystem?
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Kind Regards,
Leo Arnts


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