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World Community Grid Forums
Category: Completed Research
Forum: Computing for Clean Water Forum
Thread: Invalid work units after power failure |
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Thread Status: Active Total posts in this thread: 17
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
Quote: "I do not belieive that this
application uses checkpoints." Probably I misread that line, yes the program is coded to write them and does, which you can verify for yourself by activating a log flag, or look in any task's progress properties screen. Sample: 6457 World Community Grid 11-06-2011 13:18 Starting task c4cw_target04_013088846_0 using c4cw version 640 6458 World Community Grid 11-06-2011 13:25 [checkpoint] result c4cw_target04_013088846_0 checkpointed 6459 World Community Grid 11-06-2011 13:32 [checkpoint] result c4cw_target04_013088846_0 checkpointed 6460 World Community Grid 11-06-2011 13:39 [checkpoint] result c4cw_target04_013088846_0 checkpointed 6461 World Community Grid 11-06-2011 13:45 [checkpoint] result c4cw_target04_013088846_0 checkpointed 6462 World Community Grid 11-06-2011 13:50 [checkpoint] result c4cw_target04_013088846_0 checkpointed 6463 World Community Grid 11-06-2011 13:56 [checkpoint] result c4cw_target04_013088846_0 checkpointed 6464 World Community Grid 11-06-2011 14:03 [checkpoint] result c4cw_target04_013088846_0 checkpointed 6465 World Community Grid 11-06-2011 14:08 [checkpoint] result c4cw_target04_013088846_0 checkpointed 6466 World Community Grid 11-06-2011 14:15 [checkpoint] result c4cw_target04_013088846_0 checkpointed 6467 World Community Grid 11-06-2011 14:21 [checkpoint] result c4cw_target04_013088846_0 checkpointed 6468 World Community Grid 11-06-2011 14:28 [checkpoint] result c4cw_target04_013088846_0 checkpointed 6469 World Community Grid 11-06-2011 14:35 [checkpoint] result c4cw_target04_013088846_0 checkpointed 6470 World Community Grid 11-06-2011 14:42 [checkpoint] result c4cw_target04_013088846_0 checkpointed Why they were not recognized in your case after the power-out I don't know. Something got out of sync, then BOINC will revert to the last known stable state. --//-- |
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joeperry39@gmail.com
Advanced Cruncher USA Joined: Nov 22, 2006 Post Count: 140 Status: Offline Project Badges: 
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Clean Water checkpoints very frequently, like every 0.99% progress. You can see that in the result log you posted. Default checkpoint writing LIMIT in client is set to 60 seconds. I've changed it to 5 minutes at most (300 seconds). How/where do you make this setting change? I don't see anything in the device profile that would facilitate this change.   "Everything in moderation, including moderation" -- Mark Twain |
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astroWX
Advanced Cruncher USA Joined: Sep 1, 2007 Post Count: 56 Status: Offline Project Badges: 
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It's in boinc Preferences/Computing Preferences/Disk & Memory Usage section.
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
The checkpoint write frequency change takes effect from the start/restart of a task.
Of course, if a task is coded to only write one at end off for instance a docking cycle and the docking cycle takes 20 minutes, it wont write one more often. Writing checkpoints for some science apps is costly in terms of effort, so they're not coded to do it with fixed time intervals, rather more conveniently when the intermediate result is reached, which usually are not too big. --//-- |
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joeperry39@gmail.com
Advanced Cruncher USA Joined: Nov 22, 2006 Post Count: 140 Status: Offline Project Badges:
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It's in boinc Preferences/Computing Preferences/Disk & Memory Usage section. And where do I find this path? I can't find anything that even remotely resembles what you show.  "Everything in moderation, including moderation" -- Mark Twain |
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wplachy
Senior Cruncher Joined: Sep 4, 2007 Post Count: 423 Status: Offline |
It's in boinc Preferences/Computing Preferences/Disk & Memory Usage section. And where do I find this path? I can't find anything that even remotely resembles what you show. To change it in the Web profile: -Open the profile t/b changed -Scroll down to the "Disk Usage" section (last 1/2 of profile) -Change the: "Write to disk at most every: seconds" value -Scroll down to the bottom and click the "Save" button To change it in the local preferences -Open the Boinc Manager on the machine t/b changed -If you are using "Simple" view click the "Advanced view" button at the bottom of the dialog window -From the Advanced view click the "Advanced" command near the top of the dialog window and then click "Preferences" in the drop down list -Click the "disk and memory Usage" tab -Change the "Tasks checkpoint to disk at most every seconds" value -Click to "OK" button at the bottom of the dialog window If you change the local preferences it will override the Web profile. To clear the local preferences do the above to open the preferences dialog and then click the "Clear' button in the top right part of the dialog window To return to Simple view: -Click the "View" command near the top of the Boinc manager dialog window and select the "Simple View..." from the drop down list Good luck... BillP
Bill P
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JSYKES
Senior Cruncher Joined: Apr 28, 2007 Post Count: 206 Status: Offline Project Badges: 
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I have been having major problems with C4W (only) on restart - every time I am getting a revert to 0.000% even if it has progressed to almost complete - I have 5 WU's going at the moment - with 12 hrs crunching time, my machine froze - I restarted it and all the times reset to zero about three seconds after initially restarting at the previously achieved percentage....result, 12 hrs of crunching time wiped out!! Very frustrating. How can this be fixed???
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