Newsgroups: comp.parallel.pvm
From: Al Geist <geist@msr.epm.ornl.gov>
Subject: Re: Multihost Shared Disk Locking Supported in PVM?
Organization: Oak Ridge National Lab, Oak Ridge, TN
Date: 4 Oct 1995 03:24:56 GMT
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Message-ID: <44suq8$86f@stc06.ctd.ornl.gov>

>If I have several machines that can simultaneously access a common disk
>drive, does PVM have any way for coordinating the writing by multiple
>hosts to the one drive?  There are (at least) 2 levels to the problem --
>1) having multiple instances of an application make sure they are not
>clobbering the same storage area and 2) coordinating the file systems so
>errors aren't generated.  The first problem must be coordinated by the
>application but the second problem seems to be the tougher one.
>
>So in the case of a shared-disk parallel configuration -- versus a
>shared-memory or shared-nothing config -- does PVM have anything to help?
>If so, how would I get started using it? 

Parallel I/O using PVM -- There are a couple groups who have packages
that do this. PIOUS done at Emory U and PVMPFS done in Germany
See http://www.epm.ornl.gov/pvm  for links to these.

Al Geist


