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Date:      Tue, 28 Jul 1998 11:11:15 -0700 (MST)
From:      "Russell L. Carter" <rcarter@pinyon.org>
To:        dbader@eece.unm.edu, dfrasnel@csee.wvu.edu
Cc:        ports@FreeBSD.ORG
Subject:   Re: Ports category submission (fwd)
Message-ID:  <199807281811.LAA14805@ConSys.COM>

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|Daniel,
|
|> 	Herein lay a "sticky point" which I may or may not catch flak for
|> bringing up.  The folks at the Beowulf project (and now ExtremeLinux) are 
|> building computational clusters, some which include facilities for DSM.  
|> Personally, I define a true "parallel cluster" as something which provides 
|> not only shared processor power, but also shared memory, a distributed
|> filesystem, and (to some degree) a shared userspace.  
|
|I would include DSM, DFS, etc., as parallel computing tools, but I
|certainly wouldn't call them a "true 'parallel cluster'". Many current
|supercomputers are logically equivalent to a cluster of workstations
|with high speed interconnect, where tasks in a program communicate by
|passing messages (e.g. MPI). In my research for high performance
|computing, I develop the most efficient algorithms which dictate use
|of message passing, rather than virtual shared memory, for
|performance. This category should be inclusive -- *ANY* tools (above
|and beyond standard OS and networking infrastructure) which enable
|multiple CPUs to cooperate together to solve a computational problem.

And certainly include middleware, for instance move the ORBs out
of devel.  And queuing systems, too.  I build distributed
applications now that use both on "clusters", which in some
cases run over things like SCI.

Russell








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