Message boards : Number crunching : Will it be practical?
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Send message Joined: 10 Apr 08 Posts: 3 Credit: 3,809 RAC: 0 |
I have XP, single CPU (1 core), 256 RAM (;_;\') and am running a 160 year model in parallel with 4 other projects. Will it be practical to actually run the 160-year model? And also, if the deadline times ou, can I finish it anyway? And one last thing: Trickles every year? Oh, NO! |
Send message Joined: 5 Sep 04 Posts: 7629 Credit: 24,240,330 RAC: 0 |
1) There\'s no \'real\' deadline, but the data may be obsolete if you take, say, 10 years to finish it. 2) It\'s possible to select the type of model in the Climate prediction preferences on the server. 3) 256 Megs of ram will run the model, but with a LOT of disk swapping. 4) Trickles return data, and there is also a larger amount of data returned every 10 model years in a zip file. Backups: Here |
Send message Joined: 3 Mar 06 Posts: 96 Credit: 353,185 RAC: 0 |
I have XP, single CPU (1 core), 256 RAM (;_;\') and am running a 160 year model in parallel with 4 other projects. Will it be practical to actually run the 160-year model? Trickles every model year not real years. I recommend doing a few slab models first. See how you like those and see if you cotton to the notion of making backups diligently. If you really want to tackle a 160 year model then run a SMART diagnostic on your HD first. If it\'s the same vintage as your CPU then it may be on its last legs and the heavy swapping may just kill it and yuour model. A free SMART diagnostic and HD health info is available here. A 160 year model will take a loooooong time on that machine. The longer a model runs the more chance there is of it crashing. Reduce the risk by putting all other projects on hold for the duration of the model. They\'ll still be there after your model finishes. Finally, don\'t even think about it unless you can commit to making regular backups. |
Send message Joined: 10 Apr 08 Posts: 3 Credit: 3,809 RAC: 0 |
I knew it was a model year, I was just commenting on how long it would take to actually achieve a model year <shudders> My HD is 40 G, but only 1 G left (^_^) And this is my first model, I just got unlucky ;_;\' |
Send message Joined: 5 Sep 04 Posts: 7629 Credit: 24,240,330 RAC: 0 |
1G of HD is not enough. The model will work up to about 700 Megs or so, plus there\'s the programs, plus that needed by the other projects. And you should NEVER run the HD space \"right into the ground\". Not a good idea to run this project under the circumstances. Backups: Here |
Send message Joined: 10 Apr 08 Posts: 3 Credit: 3,809 RAC: 0 |
Yeah I know that much. I actually have 1.5 G, and I\'m usually running disk cleanups etc. regularly, so it shouldn\'t be too much of a problem, (Well, that is, as soon as CPDN decides to give me a Slab Model to work on in place of the 160-year that I aborted >_>) Also, interestingly enough, I just notices this in my Messages: 12/04/2008 9:25:03 PM|climateprediction.net|Sending scheduler request: To fetch work. Requesting 6881 seconds of work, reporting 0 completed tasks 12/04/2008 9:25:14 PM|climateprediction.net|Scheduler request succeeded: got 0 new tasks 12/04/2008 9:25:14 PM|climateprediction.net|Message from server: No work sent 12/04/2008 9:25:14 PM|climateprediction.net|Message from server: (There was work but not for the applications you have allowed. Please check your settings on the website.) 12/04/2008 9:25:14 PM|climateprediction.net|Message from server: (there was work but you don\'t have enough disk space allocated) 12/04/2008 9:25:14 PM|climateprediction.net|Message from server: Not enough disk space (only 516.8 MB free for BOINC). Review preferences for maximum disk space used. 12/04/2008 9:27:22 PM|Einstein@Home|Resuming task h1_1053.65_S5R3__898_S5R3b_1 using einstein_S5R3 version 426 ;_;\' |
Send message Joined: 5 Aug 04 Posts: 1496 Credit: 95,522,203 RAC: 0 |
Looks like you have HadAM3 (hi-res regional Model) checked in your Account Preferences. Verify that only HadSM3 (Slab) is checked. "We have met the enemy and he is us." -- Pogo Greetings from coastal Washington state, the scenic US Pacific Northwest. |
Send message Joined: 29 Sep 04 Posts: 2363 Credit: 14,611,758 RAC: 0 |
I did run a HADCM 160-year model to over 60% on a 1.3GHz computer, but it had 512Mb RAM, loads of spare disk space, and I let it run 24/7. It could have completed, but then the computer developed extra problems so I transferred the model to a new fastish machine. For everyone newly joined it\'s worth looking at the CPDN README collections (see my signature). I particularly recommend item #6 by Mike in the collection about crashes and problems. There\'s a whole collection of backup methods, really important because if a model crashes, the only way to get it back and continue crunching it is to restore a backup. I use the first method described - Les\'s easy manual method. Adding an extra 256Mb RAM card isn\'t very expensive and can be a do-it-yourself job. The computer probably has a second RAM slot. If you have the model graphics running as a screensaver, I\'d advise disabling it. That will give the computer an easier time. Cpdn news |
Send message Joined: 29 Sep 04 Posts: 2363 Credit: 14,611,758 RAC: 0 |
Just a thought. The price of external hard disks has come right down, even the ones with massive storage space. They provide a means of moving stuff off the main computer disk, you can back up everything important in case the computer fails, and there\'s room for as many backups of the BOINC folder contents as you want. And the day you do get a new computer, the external disk will work with that as well. In fact, an external disk can work simultaneously with more than one computer. Anyway, just an idea to think about. Cpdn news |
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