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World Community Grid Forums
Category: Retired Forums
Forum: The New Members Forum [Read Only]
Thread: Huge work unit.... ditch it? |
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Thread Status: Active Total posts in this thread: 6
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GB033533
Senior Cruncher UK Joined: Dec 8, 2004 Post Count: 198 Status: Offline Project Badges: 
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After a succession of small (around 3 hour) work units, my latest one appears to be huge! It's taken over 1.5 hours to take its first checkpoint, which is 0.7%..... At this rate, it will take over 200 hours to complete.
----------------------------------------Should I terminate it? Cheers, DG.   |
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GB033533
Senior Cruncher UK Joined: Dec 8, 2004 Post Count: 198 Status: Offline Project Badges:
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Nevermind... looks like it's terminated itself and given me a more manageable one!
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
Some Work Units do not converge to a solution. The program tries hard, but eventually gives up and reports 'non-convergent' back to the server. This information is valuable, so do not feel discouraged. It just means that the range of values you were assigned to investigate imply an impossible fold for your protein.
Lawrence |
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GEORGE DOMINIC
Senior Cruncher Joined: Nov 21, 2004 Post Count: 227 Status: Offline |
dun over 117hours once what do you mean its self terminating?
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
Some Work Units are 'non-convergent'. Rick Alther talked about them in his early posts. They start out looking like monster work units that will take forever to complete. Then after some time (hours in my experience) they suddenly give up and report back to the server. Then you get a new Work Unit.
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Alther
Former World Community Grid Tech United States of America Joined: Sep 30, 2004 Post Count: 414 Status: Offline Project Badges: 
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After a succession of small (around 3 hour) work units, my latest one appears to be huge! It's taken over 1.5 hours to take its first checkpoint, which is 0.7%..... At this rate, it will take over 200 hours to complete. Should I terminate it? Cheers, DG. A couple of things to keep in mind: * The time it takes between checkpoints (percent increments) is not linear. It may take hours to do one checkpoint and minutes for the next. The workunits are non-deterministic, so we have no idea how long they'll take. Just a guess. * Workunits will vary greatly in the time it takes to complete them. Some will take just a few hours, some can take days. This is due to the non-deterministic nature of the computation. * Some workunits are what we call non-convergant. When we detect this situation, we abort the workunit and return what work you have done back to the server. They're still just as valuable as any other workunit. It will likely take at least few hours to determine this scenario though.
Rick Alther
Former World Community Grid Developer |
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