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.
David C. Hill
Linux System Administrator - Enterprise