From chemistry-request@ccl.net Wed Jul 14 12:23:23 2004 Received: from mta03-svc.ntlworld.com (mta03-svc.ntlworld.com [62.253.162.43]) by server.ccl.net (8.12.8/8.12.8) with ESMTP id i6EHNMTH007191 for ; Wed, 14 Jul 2004 12:23:22 -0500 Received: from pami.OptimaNumerics.com ([62.254.49.98]) by mta03-svc.ntlworld.com (InterMail vM.4.01.03.37 201-229-121-137-20020806) with SMTP id <20040714172817.SJUI16133.mta03-svc.ntlworld.com^at^pami.OptimaNumerics.com> for ; Wed, 14 Jul 2004 18:28:17 +0100 Received: (qmail 23425 invoked by uid 544); 14 Jul 2004 17:29:30 -0000 Received: from cjtan^at^OptimaNumerics.com by iwka by uid 520 with qmail-scanner-1.22 (clamdscan: 0.73. f-prot: 4.4.2/3.14.11. spamassassin: 2.63. Clear:RC:1(10.0.3.2):. Processed in 0.293576 secs); 14 Jul 2004 17:29:30 -0000 X-Qmail-Scanner-Mail-From: cjtan^at^OptimaNumerics.com via iwka X-Qmail-Scanner: 1.22 (Clear:RC:1(10.0.3.2):. Processed in 0.293576 secs) Received: from unknown (10.0.3.2) by 0 with QMTP; 14 Jul 2004 17:29:29 -0000 Received: (qmail 15540 invoked from network); 14 Jul 2004 17:29:28 -0000 Received: from localhost (127.0.0.1) by 0 with SMTP; 14 Jul 2004 17:29:28 -0000 Date: Sat, 12 Jun 2004 15:52:27 +0000 (UTC) From: C J Kenneth Tan -- OptimaNumerics To: Marc Noguera Julian cc: CCL Subject: CCL:cooling needs In-Reply-To: <3EE6F1E2.5020003^at^klingon.uab.es> Message-ID: References: <3EE6F1E2.5020003^at^klingon.uab.es> Organization: "OptimaNumerics" URL: http://www.OptimaNumerics.com MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII ReSent-Date: Wed, 14 Jul 2004 17:29:24 +0000 (UTC) ReSent-From: "C. J. K. Tan" ReSent-To: CCL ReSent-Subject: CCL:cooling needs ReSent-Message-ID: X-Spam-Status: No, hits=5.7 required=7.5 tests=NO_RDNS2,RCVD_IN_DYNABLOCK, RCVD_IN_SORBS,RM_fw_FromIsPhras2 autolearn=no version=2.61 X-Spam-Checker-Version: SpamAssassin 2.61 (1.212.2.1-2003-12-09-exp) on servernd.ccl.net Marc, > I need to stablish some kind fo relation between number of PC's running and > the cooling needed for them (number of frigories). Can anyone help > Thanks in advance I don't think this is a simple question. What kind of machines are you putting in? Are the rack-mounted? How many CPUs in a single 1U or 2U unit? Who made the machines? What is the air flow condition in the room? There was a talk by Steve Smith (Dell) at ICCSA 2004 last month, that illustrated some of the complexities of machine configuration in a machine room. He also covered the associated issue of efficiency of code and the cost of computation. The slides are available for download at the conference web site: http://iccsa2004.unipg.it/plenary/SteveSmith.zip Kenneth Tan P/S: This is not meant to be an advert for OptimaNumerics, but Steve did mention OptimaNumerics in the presentation. ----------------------------------------------------------------------- C. J. Kenneth Tan, Ph.D. OptimaNumerics Ltd. E-mail: cjtan^at^OptimaNumerics.com Telephone: +44 798 941 7838 Web: http://www.OptimaNumerics.com Facsimile: +44 289 066 3015 -----------------------------------------------------------------------