Path: utzoo!mnetor!uunet!husc6!tut.cis.ohio-state.edu!mailrus!ames!pasteur!ucbvax!CPSWH.CPS.MSU.EDU!rang%cps45x
From: rang%cps45x@CPSWH.CPS.MSU.EDU (Anton Rang)
Newsgroups: comp.os.vms
Subject: interprocess communication
Message-ID: <8803160236.AA11670@cps45x>
Date: 16 Mar 88 02:36:43 GMT
References: <8803160225.AA11623@cpswh.cps.msu.edu>
Sender: usenet@ucbvax.BERKELEY.EDU
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  *WARNING WARNING WARNING*

  VMS 4.x has some serious problems with suspend/resume.  In 99% of
the cases, you will have no problem.  In the other 1%, your entire
system may be effectively locked up.  Basically, if a process is doing
anything with a shared file (especially a system shared file like
SYSUAF or RIGHTSLIST) it is unsafe to suspend it.  Anything that
translates a user-id to a username will open RIGHTSLIST, for example.
  Depending on how much I/O you need to do, it might be possible to
use a prompting $QIO to handle it--the prompt can be almost
indefinitely long, I think.

					Anton Rang
					Graduate Student
					Michigan State University

Disclaimer: nobody else thinks the way I do