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[Linux-cluster] GFS2 Test setup



We are in the process of building a cluster, which will hope to put into production when RHEL 5.3 is released. Our plan is to use GFS2, which we've been experimenting with for some time, but we're having some problems. The cluster has 3 nodes, two HP DL580's and one HP DL585 -- we're using ILO for fencing. We want to share a couple of filesystems using GFS2 which are connected to our SAN (an EVA 5000). I've set everything up and it all works as expected, although on occasion, GFS2 just seems to hang. This happens 1-4 times/week. What I note in the logs are a series of dlm messages. On node 1 (for example) I see:

dlm: connecting to 3
dlm: connecting to 2
dlm: connecting to 2
dlm: connecting to 2
dlm: connecting to 3
dlm: connecting to 2
dlm: connecting to 2
dlm: connecting to 2
dlm: connecting to 3
dlm: connecting to 3
dlm: connecting to 3
dlm: connecting to 3

On node 2, I see:

dlm: got connection from 1
Extra connection from node 1 attempted
dlm: got connection from 1
Extra connection from node 1 attempted
dlm: got connection from 1
Extra connection from node 1 attempted
dlm: got connection from 1
Extra connection from node 1 attempted
dlm: got connection from 1
Extra connection from node 1 attempted
dlm: got connection from 1
Extra connection from node 1 attempted

and on node 3, I see:
dlm: got connection from 1
Extra connection from node 1 attempted
dlm: got connection from 1
Extra connection from node 1 attempted
dlm: got connection from 1
Extra connection from node 1 attempted
dlm: got connection from 1
Extra connection from node 1 attempted
dlm: got connection from 1
Extra connection from node 1 attempted
dlm: got connection from 1
Extra connection from node 1 attempted


Now for my questions. I know that GFS2 isn't officially released, yet, and I've been seeing logs of checkins on cluster-devel. Should I updated to the latest GFS2 to continue my testing? Is the dlm condition outlined above a known bug in GFS2 that's been fixed in later releases, or have I tripped over something new?

Any suggestions would be appreciated!

-- scooter

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