[Linux-cluster] GFS: FS Mounting Issues

[Robert]

All,

 

I have a question regarding the latest implementation of GFS 6.0 with RedHat
Linux 3.0 Enterprise.  What my company has going on is this:  We have a SAN
project coming up but we do not have the SAN or a similar type shared
storage device available.  We have the node machines on hand and are trying
to work through the GFS implementation as we are new to GFS (We have run
RedHat Linux since version 5.0 and all the flavors in between.).  We have
tried to simulate the SAN environment by utilizing the GNBD software and we
have followed the instructions available at:
<http://www.redhat.com/docs/manuals/csgfs/admin-guide/s1-ex-slm-ext-gnbd.htm
l>
http://www.redhat.com/docs/manuals/csgfs/admin-guide/s1-ex-slm-ext-gnbd.html

 

This is the LOCK_GULM, SLM External, and GNBD example of GFS.

 

We have not had any problems getting the shared devices, pools, and
filesystems created as followed in the documentation.  What we have
happening is that when we mount the GFS filesystem on one node and then we
try and mount the filesystem on the second node, the second node will hang
when issued the command to mount the filesystem.  No errors are reported on
console or in logs.  No errors are reported in the Lock Server either.
Everything appears to be working correctly as the log information for both
machines at that instant are the same, ie, the one that is hung, has the
same log messages as the one that is not hung.  

 

When I go to node one, with node two still trying to mount the filesystem,
and unmount the filesystem, node two immediately finishes the mount command
and everything is fine with node two.  However, when trying to mount node
one again, it just hangs and so on.  It is only allowing one node to mount
the filesystem at once.  The configuration files are all the generic
examples given in the documentation with the fencing mechanism as GNBD
(Tried fencing with manual and the same situation exists with that method.).
I can provide all configuration files and also give log file information if
this problem isn't something that experienced GFS users know what the
problem may be.  

 

Thank you all for your time.

 

Robert

Fidelity Communications

 
ps. I'm not sure if my first message got through as I sent it via an
alternate email address so if this is a duplicate, please ignore.
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