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
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 = "jid=1:id=2752514:first=0"
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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