[Linux-cluster] GFS2 Test setup

[Scooter Morris]

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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