[Pvfs2-users] running executables from PVFS filesystems

[Mark Bartelt]

Someone forwarded me the following URL ...

http://thunderhead.gsfc.nasa.gov/Users_Guide/PVFS.shtml

... an excerpt from which is appended below.  Does this
seem reasonable?  I'm a bit puzzled about why running an
executable that happens to live on a PVFS filesystem is
likely to cause much grief.  Is it frequent page-ins of
the a.out's text segment, or something else entirely?

(Or for that matter, is the claim below even true?)

=============================================

 Can I run my executables from my user directory in
 /data1 (on the PVFS server)?

 NO, PLEASE DON'T DO THIS!  It will cause PVFS to run
 painfully slowly for all of the users and the sysadmins
 will become quite manic.  Be a good neighbor, and run
 from home/rhome, please don't run executables from PVFS.

 If you decide to run from PVFS anyway, you could correctly
 visualize your office as being similar to Frankenstein's
 castle being stormed by furious torch-bearing Thunderhead
 users and anxious system administrators.