From mboxrd@z Thu Jan 1 00:00:00 1970 Received: (from weis@localhost) by pauillac.inria.fr (8.7.6/8.7.3) id UAA18498 for caml-red; Mon, 20 Nov 2000 20:21:31 +0100 (MET) Received: from nez-perce.inria.fr (nez-perce.inria.fr [192.93.2.78]) by pauillac.inria.fr (8.7.6/8.7.3) with ESMTP id DAA15010 for ; Mon, 20 Nov 2000 03:34:31 +0100 (MET) Received: from pm10sm.wcom.com (pm10sm.wcom.com [199.249.20.157]) by nez-perce.inria.fr (8.11.1/8.10.0) with ESMTP id eAK2YTL20995 for ; Mon, 20 Nov 2000 03:34:30 +0100 (MET) Received: from bert.amnh.org ([63.22.248.243]) by mail-relay.mciworld.com (PMDF V5.2-32 #38254) with ESMTP id <0G4A000L4XTACN@mail-relay.mciworld.com> for caml-list@inria.fr; Mon, 20 Nov 2000 02:34:28 +0000 (GMT) Date: Sun, 19 Nov 2000 21:39:21 -0500 From: Ward Wheeler Subject: Re: Cluster Multiprocessing In-reply-to: X-Sender: wheeler@amnh.org To: David McClain Cc: caml-list@inria.fr Message-id: <4.3.2.7.1.20001119213057.00dc3960@amnh.org> MIME-version: 1.0 X-Mailer: QUALCOMM Windows Eudora Version 4.3.2 Content-type: text/plain; charset="us-ascii"; format=flowed References: <000501c0504d$796a3000$210148bf@dylan> Sender: weis@pauillac.inria.fr Hello, I've been using CAML and PVM for about 5 years now, most recently on a cluster of 256 CPUs in 128 boxes. The code is used for the construction of phylogenetic trees from molecular and other data. All of our code is at ftp.amnh.org /pub/molecular/poy. The setup seems to work very well, but as mentioned in a previous note, this is message passing and has no shared memory among machines. Ward Wheeler >On Thu, 16 Nov 2000, David McClain wrote: > > > I am about to embark on a project that seeks to reduce the computation time > > of a large problem from 100+ hours to less than 20 minutes. This is > > initially though to require a cluster of multiprocessors using either a > > Beowulf architecture, or a large, shared memory, message passing, > > architecture. I am interested in the suitability (or otherwise) of OCaml to > > such computations and the experiences of anyone else in this group on such > > architectures. Garbage collection across nodes in a shared memory > > architecture seems like a particularly daunting problem. > > > > Any responses would be appreciated. > > Shared memory architectures is just the same as ordinary multithereaded >environment. And, there are PVM3 and MPI bindings for OCaml, if you want >to use message-passing clustering. > >-- > > V.S.Lugovsky aka Mauhuur (http://ontil.ihep.su/~vsl) (UIN=45482254) ********************************* Ward Wheeler Division of Invertebrate Zoology American Museum of Natural History Central Park West @ 79th St. New York, NY 10024-5192 1-212-769-5754 (Voice) 1-212-769-5783 (FAX) *********************************