Author: Michael Nieves
Date: 14:54:32 10/11/01
Go up one level in this thread
You guys reminded of an "accident" I had in the early nineties working on a Cray. Our firm had contracted some CPU time on a Cray on an DOD facility. I migrated a version of scientific code to the cray to do some testing. I fired off the code and went to grab some coffee. I returned 5 minutes later and observed that the program had hung. I killed the process and went back to our slow alphas to do some debugging. Turned out to be a simple bug that caused an infinite loop. I didn't think much of it until a month later when I received a $10,000 bill from the DOD. Needless to say, I treaded carefully thereafter. On October 11, 2001 at 11:23:38, Robert Hyatt wrote: >On October 11, 2001 at 00:43:57, Slater Wold wrote: > >>On October 11, 2001 at 00:27:17, Robert Hyatt wrote: >> >>>On October 10, 2001 at 22:55:27, Slater Wold wrote: >>> >>>>On October 10, 2001 at 22:36:01, Robert Hyatt wrote: >>>> >>>>>On October 10, 2001 at 16:55:16, Olaf Jenkner wrote: >>>>> >>>>>>>Some took hours on a Cray (Stiller). Figure months on a PC for those. >>>>>>>No idea how long the really bad ones will take (kppkpp for example.) >>>>>>>The promotion cases will certainly take a _long_ while... >>>>>> >>>>>>Didn't use Stiller the connection machine? >>>>>>I remember that I read 1991 about this. >>>>>> >>>>>>OJe >>>>> >>>>> >>>>>He used both. Burton Wendroff/Tony Warnock got him some time on a C90 >>>>>sometime in the 1993 time frame... The advantage of the C90 is that it >>>>>comes with 32 gigabytes of RAM, which was helpful for making the generator >>>>>run very fast... Of course, he didn't do any compression, and he couldn't >>>>>write the files out to anything for saving them... but he did compute some >>>>>statistics about them before chucking them. >>>> >>>>Any idea where to get those statistics Bob? >>> >>> >>>I believe Lewis published some of them quite some while back. But the >>>thing he published was mainly "deepest mate" and the like. I didn't follow >>>this very closely, and only remember Wendroff asking for "my contact" up at >>>Cray in trying to set the time up... >> >>Ok. Thanks. >> >>> >>> >>> >>> >>>> >>>>Who is compiling them now? >>> >>>Only Eugene so far as I know... >> >>On what? And how is he doing the 6 pieces? I thought you needed a 64-bit OS >>and a LOT of memory and HD space. > > >Last I heard he was using some "unused" alphas at microsoft. Since MS >no longer supports the alpha with NT, the machines were free and he >grabbed them. :) > > > >> >>> >>> >>> >>>> >>>>How hard is it to get time on a Cray? >>>> >>> >>>Have you noticed a "lack" of "cray blitz"? Draw your own conclusion. :) >> >>Well, it was running at one time! What's the difference between then and now!?! > > >we could get time to play in one tournament a year. Maybe a few nights of >testing between 1am and 5am if we were lucky. > > > > >> >>> >>>The machines sell for $60,000,000.00 or so. So yes, it takes a lot of >>>haggling to get time... >> >>Jeez.... >> >>> >>>At one time CPU time was going for $20,000 per hour... >> >>Man oh man. I went looking up Cray's, (other than www.cray.com) and all I could >>find was crap about Cray, Inc. suing the United States of America. (The CIA was >>one of the organizations involved.) >> > > >Not sure what that is about. The US Government (the NSA and other "black" >agencies as well) are their best customers. NSA has a "cluster" of crays >if you can call that a "cluster". :) > > > > >>So renting one for a day is pretty much outta the question for me.....as I don't >>have $480,000 to blow. >> >>What a shame. >> >>> >>> >>> >>> >>> >>> >>>> >>>> >>>>Slate
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