su segfault (core dump) problem.

Georgia Southern Beowulf Cluster Project gscluster at
Mon Jan 22 13:40:02 EST 2001


I'm running 15 diskless nodes attached to another node using NFS to export 
to each node: a / filesystem, a shared /home filesystem, and a shared /usr 
filesystem.  This is a new setup I just implimented (mostly sharing /usr as 
before each node had its own instead of sharing).  I'm running RH 6.2 with 
PVM3 and I've been testing it with pvmpovray.  As of right now, I can rsh 
into all nodes from any other node (security is not an issue).  However, 
when I su to become root and do administrative tasks all nodes will now 
segfault and sometimes (not always) cause a core dump.  Now, I'm far from 
knowledgeable about cores, but does anyone have any suggestions or previous 
experiences with similar problems.  This did not happen before, when all 
nodes had individual /usr directories (this made software addition 

Thank you,

Wes Wells

Georgia Southern University
Beowulf Cluster Project
gscluster at

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