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From: Larry McVoy <lm@bitmover.com>
To: Dana Lacoste <dana.lacoste@peregrine.com>
Cc: "'Larry McVoy'" <lm@bitmover.com>,
	"Martin J. Bligh" <Martin.Bligh@us.ibm.com>,
	linux-kernel@vger.kernel.org
Subject: Re: SMP/cc Cluster description
Date: Fri, 7 Dec 2001 11:28:37 -0800	[thread overview]
Message-ID: <20011207112837.R27589@work.bitmover.com> (raw)
In-Reply-To: <B51F07F0080AD511AC4A0002A52CAB445B29B8@OTTONEXC1>
In-Reply-To: <B51F07F0080AD511AC4A0002A52CAB445B29B8@OTTONEXC1>; from dana.lacoste@peregrine.com on Fri, Dec 07, 2001 at 11:14:13AM -0800

On Fri, Dec 07, 2001 at 11:14:13AM -0800, Dana Lacoste wrote:
> Man you guys are NUTS.

I resemble that remark :-)

> > Did you even consider that this is virtually identical to the problem
> > that a network of workstations or servers has?  Did it occur 
> > to you that
> > people have solved this problem in many different ways?  Or 
> > did you just
> > want to piss into the wind and enjoy the spray?
> 
> I may be a total tool here, but this question is really bugging me :
> 
> What, if any, advantages does your proposal have over (say) a Beowulf
> cluster?  Why does having the cluster in one box seem a better solution
> than having a Beowulf type cluster with a shared Network filesystem?

Because I can mmap the same data across cluster nodes and get at it using
hardware, so a cache miss is a cache miss regardless of which node I'm
on, and it takes ~200 nanoseconds.  With a network based cluster, those
times go up about a factor of 10,000 or so.
-- 
---
Larry McVoy            	 lm at bitmover.com           http://www.bitmover.com/lm 

  reply	other threads:[~2001-12-07 19:29 UTC|newest]

Thread overview: 75+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2001-12-07 19:14 SMP/cc Cluster description Dana Lacoste
2001-12-07 19:28 ` Larry McVoy [this message]
  -- strict thread matches above, loose matches on Subject: below --
2001-12-10 15:59 cardente, john
2001-12-06 22:20 cardente, john
2001-12-06 23:00 ` Jeff V. Merkey
2001-12-04 23:31 Linux/Pro [was Re: Coding style - a non-issue] Rik van Riel
2001-12-04 23:37 ` Martin J. Bligh
2001-12-05  0:36   ` SMP/cc Cluster description [was Linux/Pro] Larry McVoy
2001-12-05  2:36     ` SMP/cc Cluster description David S. Miller
2001-12-05  3:23       ` Larry McVoy
2001-12-05  6:05         ` David S. Miller
2001-12-05  6:51           ` Jeff Merkey
2001-12-06  2:52           ` Rusty Russell
2001-12-06  3:19             ` Davide Libenzi
2001-12-06  7:56               ` David S. Miller
2001-12-06  8:02                 ` Larry McVoy
2001-12-06  8:09                   ` David S. Miller
2001-12-06 18:27                     ` Jeff V. Merkey
2001-12-06 18:37                       ` Jeff V. Merkey
2001-12-06 18:36                         ` Martin J. Bligh
2001-12-06 18:45                           ` Jeff V. Merkey
2001-12-06 19:11                       ` Davide Libenzi
2001-12-06 19:34                         ` Jeff V. Merkey
2001-12-06 23:16                           ` David Lang
2001-12-07  2:56                             ` Jeff V. Merkey
2001-12-07  4:23                               ` David Lang
2001-12-07  5:45                                 ` Jeff V. Merkey
2001-12-06 19:42                   ` Daniel Phillips
2001-12-06 19:53                     ` Larry McVoy
2001-12-06 20:10                       ` Daniel Phillips
2001-12-06 20:10                         ` Larry McVoy
2001-12-06 20:15                           ` David S. Miller
2001-12-06 20:21                             ` Larry McVoy
2001-12-06 21:02                               ` David S. Miller
2001-12-06 22:27                                 ` Benjamin LaHaise
2001-12-06 22:59                                   ` Alan Cox
2001-12-06 23:08                                   ` David S. Miller
2001-12-06 23:26                                     ` Larry McVoy
2001-12-07  2:49                                       ` Adam Keys
2001-12-07  4:40                                         ` Jeff Dike
2001-12-06 21:30                               ` Daniel Phillips
2001-12-07  8:54                                 ` Henning Schmiedehausen
2001-12-07 16:06                                   ` Larry McVoy
2001-12-07 16:44                                     ` Martin J. Bligh
2001-12-07 17:23                                       ` Larry McVoy
2001-12-07 18:04                                         ` Martin J. Bligh
2001-12-07 18:23                                           ` Larry McVoy
2001-12-07 18:42                                             ` Martin J. Bligh
2001-12-07 18:48                                               ` Larry McVoy
2001-12-07 19:06                                                 ` Martin J. Bligh
2001-12-07 19:00                                         ` Daniel Bergman
2001-12-07 19:07                                           ` Larry McVoy
2001-12-09  9:24                                           ` Pavel Machek
2001-12-06 22:37                               ` Alan Cox
2001-12-06 22:35                                 ` Larry McVoy
2001-12-06 22:54                                   ` Alan Cox
2001-12-07  2:34                                     ` Larry McVoy
2001-12-07  2:50                                       ` David S. Miller
2001-12-06 22:38                           ` Alan Cox
2001-12-06 22:32                             ` Larry McVoy
2001-12-06 22:48                               ` Alexander Viro
2001-12-06 22:55                               ` Alan Cox
2001-12-06 23:15                                 ` Larry McVoy
2001-12-06 23:19                                   ` David S. Miller
2001-12-06 23:32                                     ` Larry McVoy
2001-12-06 23:47                                       ` David S. Miller
2001-12-07  0:17                                         ` Larry McVoy
2001-12-07  2:37                                           ` David S. Miller
2001-12-07  2:43                                             ` Larry McVoy
2001-12-07  2:59                                               ` David S. Miller
2001-12-07  3:17                                               ` Martin J. Bligh
2001-12-06 14:24               ` Rik van Riel
2001-12-06 17:28                 ` Davide Libenzi
2001-12-06 17:52                   ` Rik van Riel
2001-12-06 18:10                     ` Davide Libenzi
2001-12-05  8:12         ` Momchil Velikov
2001-12-05  3:25       ` Davide Libenzi
2001-12-05  3:17     ` Stephen Satchell

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