[Beowulf] Win64 Clusters!!!!!!!!!!!!

Michael Will mwill at penguincomputing.com
Tue Apr 10 17:26:32 EDT 2007


As far as I remember PVM has some overhead to facilitate message passing
in a heterogenous environment 
that MPI does not have. 

I had a customers sample code that required some data to be moved from
the headnode to a compute node
and while on PVM they would get about 50MB/s MPI could transfer about
100MB/s across gigabit ethernet.

Michael
-----Original Message-----
From: beowulf-bounces at beowulf.org [mailto:beowulf-bounces at beowulf.org]
On Behalf Of Mark Hahn
Sent: Tuesday, April 10, 2007 1:29 PM
To: Robert G. Brown
Cc: Beowulf Mailing List
Subject: Re: [Beowulf] Win64 Clusters!!!!!!!!!!!!

> It was PVM that enabled true message passing parallel code to be 
> written that made a pile of machines (be they Alphas, simple PCs, Sun

I'm not disagreeing, but wonder why PVM is basically extinct now.
that is, why was MPI considered an improvement/replacement?

> MS knifed IBM over OS/2 (which was a decently designed OS that might 
> have given Unix a real run for its money) and hence lost out on all 
> the

I worked on OS/2, and it was no peach on the inside, so to speak ;) it's
hard to speculate about what-ifs on a system which had barely shaken off
its initial hw target (12 MHz 286!) by the time it was dropped.
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