From chemistry-request ^%at%^ server.ccl.net Mon Mar 4 03:11:12 2002 Received: from cns.FTA-Berlin.de ([141.16.244.4]) by server.ccl.net (8.11.6/8.11.0) with ESMTP id g248BC506601 for ; Mon, 4 Mar 2002 03:11:12 -0500 Received: from langmuir.aca-berlin.de (langmuir.ACA-Berlin.de [141.16.16.120]) by cns.FTA-Berlin.de (8.11.3/8.11.3/SuSE Linux 8.11.1-0.5) with ESMTP id g248AWE32051; Mon, 4 Mar 2002 09:10:32 +0100 Date: Mon, 4 Mar 2002 09:07:31 +0100 (CET) From: To: David Close cc: Subject: Re: CCL:G98 Dual Processor ?? In-Reply-To: <3.0.6.32.20020301145133.009dfcd0 {*at*} access.etsu.edu> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Hi David, some hints to your questions: > Now I have a question about the dual processors. What is the best > way to utilize this extra power? Run two jobs, each one on a separate > processor, or look into parallel G98 code? As I am rather inexperienced > in UNIX, I am not at all certain even how to run two jobs at the same time. > Any suggestions would be greatly appreciated. Two Jobs at the same time are great, because normally you will not get an ideal speedup of 2. You may consider starting even more jobs (perhaps 4) at one time: If you are doing heavy I/O your processor is mostly idle and waiting for the disk. If not, 2 are pretty good ... > One more thing. I often run big jobs strung together with the --link1-- > command. This is fine, but jobs tend to finish in the middle of the > night. Does anyone know how to start a new job automatically when a big > job is finished? I tried to add more --link1--'s to a .com file that > was currently executing, and the whole job crashed in just a few minutes. You should install a queueing systen like NQS or one of your Linux distribution. Check simply out your install routine ... Alex --- Dr. Alexander Hofmann Institute for Applied Chemistry Berlin-Adlershof P.O. Box 96 11 56 Richard-Willstaetter-Str. 12 D-12474 Berlin D-12489 Berlin hofmann # - at - # aca-berlin.de Tel.: +49-30-6392-4408 Fax.: +49-30-6392-4350 http://www.aca-berlin.de PGP-Private key: http://wwwkeys.de.pgp.net:11371 ID:0xF39A0BC8