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"Arnts, Leo" 04-22-2011 07:01 AM

GFS2 performance
 
Hi,
¬*
I’m trying to get more performance out of my DRBD cluster with gfs2.
It seems that our gfs2 implementation is quit slow.
¬*
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:
¬*¬*¬*¬*¬*¬*¬* <dlm plock_ownership="1" plock_rate_limit="0"/>
¬*¬*¬*¬*¬*¬*¬* <gfs_controld plock_rate_limit="0"/>
¬*
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
¬*
gfs2_tool df -H
/mnt/backup:
¬* SB lock proto = "lock_dlm"
¬* SB lock table = "cybercenter:backup"
¬* SB ondisk format = 1801
¬* SB multihost format = 1900
¬* Block size = 4096
¬* Journals = 2
¬* Resource Groups = 7451
¬* Mounted lock proto = "lock_dlm"
¬* Mounted lock table = "cybercenter:backup"
¬* Mounted host data = "">
¬* Journal number = 1
¬* Lock module flags = 0
¬* Local flocks = FALSE
¬* Local caching = FALSE
¬*
¬* Type¬*¬*¬*¬*¬*¬*¬*¬*¬*¬* Total¬*¬*¬*¬*¬*¬*¬*¬*¬* Used¬*¬*¬*¬*¬*¬*¬*¬*¬*¬* Free¬*¬*¬*¬*¬*¬*¬*¬*¬*¬* use%¬*¬*¬*¬*¬*¬*¬*¬*¬*¬*
¬*¬*------------------------------------------------------------------------
¬* data¬*¬*¬*¬*¬*¬*¬*¬*¬*¬* 3T¬*¬*¬*¬*¬*¬*¬*¬*¬*¬*¬*¬* 1T¬*¬*¬*¬*¬*¬*¬*¬*¬*¬*¬*¬* 1T¬*¬*¬*¬*¬*¬*¬*¬*¬*¬*¬*¬* 47%
¬* inodes¬*¬*¬*¬*¬*¬*¬*¬* 1T¬*¬*¬*¬*¬*¬*¬*¬*¬*¬*¬*¬* 96M¬*¬*¬*¬*¬*¬*¬*¬*¬*¬*¬* 1T¬*¬*¬*¬*¬*¬*¬*¬*¬*¬*¬*¬* 0%
¬*
Hdparm information of the disk:
hdparm -tT /dev/sdb
/dev/sdb:
Timing cached reads:¬*¬* 20988 MB in¬* 2.00 seconds = 10512.28 MB/sec
Timing buffered disk reads:¬*¬* 74 MB in¬* 3.05 seconds =¬* 24.30 MB/sec
¬*
¬*
Has someone an idea about increasing the performance of my gfs2 filesystem?
¬*
Kind Regards,
Leo Arnts


¬*
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