Message boards :
Number crunching :
Strange deadlines
Message board moderation
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 slavko.skSend message Joined: 28 Sep 04 Posts: 15 Credit: 176,263 RAC: 0 |
A few days ago I donwloaded few WU's with deadline of 7th september. But from yesterday or so I'm downloading WU's with deadline of 3rd september. If this will continue, then WU's with deadline of 7th september will expire. Is this ok, or WU's which I'm recieving now are some "fast" to compute first and in a few days they will stop distribute them. Does anybody know about this? ALL GLORY TO THE HYPNOTOAD! Potrebujete pomoc? 
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Send message Joined: 1 Sep 04 Posts: 506 Credit: 118,619 RAC: 0 |
<blockquote>A few days ago I donwloaded few WU's with deadline of 7th september. But from yesterday or so I'm downloading WU's with deadline of 3rd september. If this will continue, then WU's with deadline of 7th september will expire. Is this ok, or WU's which I'm recieving now are some "fast" to compute first and in a few days they will stop distribute them. Does anybody know about this?</blockquote> A couple of weeks ago LHC@Home installed a deadline optimiser that looks at the available computing capacity and estimates the deadline that will complete the study fastest. After they did this the deadlines started dropping - first to eight days, and now five. A shorter deadline means that WUs will be re-issued sooner if they're not returned, so the study should complete earlier. Your machines should crunch WUs in the order they are received, unless deadlines start approaching. In this case the client should switch to Earliest Deadline First (EDF) mode, and later WUs with earlier deadlines will crunch first. You should be fine unless you have a cache set to several days. I suspect that the tight deadlines will drive away some participants who can't or don't wish to provide computing resources to meet the tight schedule. We'll see! Gaspode the UnDressed http://www.littlevale.co.uk |
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slavko.sk Send message Joined: 28 Sep 04 Posts: 15 Credit: 176,263 RAC: 0 |
<blockquote>Your machines should crunch WUs in the order they are received, unless deadlines start approaching. In this case the client should switch to Earliest Deadline First (EDF) mode, and later WUs with earlier deadlines will crunch first.</blockquote> Computer is running in "29.8.2005 22:07:48||Using earliest-deadline-first scheduling because computer is overcommitted." EDF mode, so processing is right. Only question is how it will continue and if it will catch WU's with later deadline on time. ALL GLORY TO THE HYPNOTOAD! Potrebujete pomoc?
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Send message Joined: 1 Sep 04 Posts: 506 Credit: 118,619 RAC: 0 |
<blockquote> Computer is running in "29.8.2005 22:07:48||Using earliest-deadline-first scheduling because computer is overcommitted." EDF mode, so processing is right. Only question is how it will continue and if it will catch WU's with later deadline on time.</blockquote> If your machine says it is overcommitted then there is a chance that it won't complete WUs by the deadline. If you're running another BOINC project then you could suspend it or reduce its resource share to give LHC a bit more CPU time, but you might miss deadlines elsewhere. Keep a close eye on it... Gaspode the UnDressed http://www.littlevale.co.uk |
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The Gas Giant Send message Joined: 2 Sep 04 Posts: 309 Credit: 715,258 RAC: 0 |
I wouldn't worry too much. Since the wu estimation times are sooo wrong even under 4.72 which is an improvement, it means that the total work that BOINC thinks you have is actually less than what you actually have, so it should all be completed before the deadlines are reached. You should also see a message that says something like "...work fetch is suspended." Live long and crunch. Paul (S@H1 8888)  BOINC/SAH BETA
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slavko.sk Send message Joined: 28 Sep 04 Posts: 15 Credit: 176,263 RAC: 0 |
Yes, I already seen massage: 30.8.2005 11:17:48|LHC@home|Message from server: (won't finish in time) Computer on 96.6% of time, BOINC on 99.2% of that, this project gets 40.0% of that Which prevent to download new work. I will keep an eye on it, it is my notebook, no problem. Just wondering how they distribute work. In general it is nice. ALL GLORY TO THE HYPNOTOAD! Potrebujete pomoc?
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Chrulle Send message Joined: 27 Jul 04 Posts: 182 Credit: 1,880 RAC: 0 |
Remember also that a deadline is not a hard deadline. You can still return a result for some time after the deadline and still have a reaonable time to get it accepted by the server. Chrulle Research Assistant & Ex-LHC@home developer Niels Bohr Institute |
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slavko.sk Send message Joined: 28 Sep 04 Posts: 15 Credit: 176,263 RAC: 0 |
Mentioned box finished all "short deadline" WU in a meantime. So everything goes well. I'm waiting for new server which I will connect also to this project. Hope, here will be enough work in hte future. ALL GLORY TO THE HYPNOTOAD! Potrebujete pomoc?
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