cleaning up SHM segments

[Victoria Pennington]

Hi.

This subject has arisen a few times on the list, but I wonder if anyone
has a conclusive answer to the issue of shared memory segments being 
left on nodes after an MPI job (with shared memory support) has died?

My idea is to use a PBS epilogue script to run cleanipcs (as the user).
This will of course get rid of ALL the user's SHM segments on each node 
on which the job was run, regardless of which job they were attached to,
but I'm assuming that only one such job would be running on each node 
at any one time.

Is this a workable solution?

This must be an issue at many sites, unless it's more usual practice 
for users to disable shared memory support?  Any help with this would 
be much appreciated. 

Thanks
Victoria
----------------------
Dr Victoria Pennington
Institute of Pharmaceutical Innovation
University of Bradford, Bradford BD7 1DP
v.pennington at bradford.ac.uk
01274 236185