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Re: [Linux-cluster] GFS2 cluster node is running very slow



Hi guys,

 

I’ve found this in /sys/kernel/debug/gfs2/fsname/glocks

 

H: s:EX f:tW e:0 p:22591 [jsvc] gfs2_inplace_reserve_i+0x451/0x69a [gfs2]

H: s:EX f:tW e:0 p:22591 [jsvc] gfs2_inplace_reserve_i+0x451/0x69a [gfs2]

H: s:EX f:W e:0 p:806 [pdflush] gfs2_write_inode+0x57/0x152 [gfs2]

 

The application running is confluence and has 184 thread.   The other nodes work fine but that specific node is having issues obtaining locks when it’s time to write?

 

Dave

 

 

 

 

From: linux-cluster-bounces redhat com [mailto:linux-cluster-bounces redhat com] On Behalf Of David Hill
Sent: 29 mars 2011 21:00
To: linux-cluster redhat com
Subject: [Linux-cluster] GFS2 cluster node is running very slow

 

Hi guys,

 

                We have a GFS2 cluster consisting of 3 nodes.  At this point, everything is going smooth.  Now, we add a new node with more CPUs with the

exact same configuration but all transactions on the mount run very slow.

 

Copying a file to the mount is done at about 25kb/s when on the three other nodes, everything goes smooth at about 7MB/s.

CPU on all nodes is idling at some point, all cluster process are kind of sleeping.

 

We’ve tried the ping_pong.c from apache and it seems to be able to write/read lock files at a decent rate.

 

There’s other mounts on the system using the same fc card/fibers/switches/san and all these are also working at a decent speed...

 

I’ve been reading a good part of the day, and I can’t seem to find a solution.

 

 

 

 

ubisoft_logo

David C. Hill

Linux System Administrator - Enterprise

514-490-2000#5655

http://www.ubi.com

 


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