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Restore from Checkpoint
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Author | Message |
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Send message Joined: 28 Aug 04 Posts: 65 Credit: 9,636,280 RAC: 0 |
I have a lost a number of workunits due to system crashes and lockups. In each case CPDN downloads a completely new workunit and I have to restart from zero. It would be nice to have the option to checkpoint the CPDN system state from time to time and then restore and resume processing from a saved state if need be. |
Send message Joined: 5 Aug 04 Posts: 426 Credit: 2,426,069 RAC: 0 |
CPDN checkpoints every 144 timestamps. However any time there is a crash there is a chance that the checkpoint file will be corrupt and cause the model to either restart or be abandoned. <br>John Keck -- BOINCing since 2002/12/08 -- <a href="http://www.boinc.dk/index.php?page=user_statistics&project=cpdn&userid=191"><img border="0" height="80" src="http://191.cpdn.sig.boinc.dk?188"></a> |
Send message Joined: 28 Aug 04 Posts: 65 Credit: 9,636,280 RAC: 0 |
I probably phrased the question poorly .. what I should have been asking for is a "restore point" . A point where the entire workunit can be restarted at my option. I see a suggestion in another thread that the workunit can be backed up manually and then copied back if needed. I will give that a try. Thanks for your response John. It's an interesting project .. it is just going to take a litle time to get work through the inevitable gotchas. |
Send message Joined: 28 Aug 04 Posts: 65 Credit: 9,636,280 RAC: 0 |
> I see a suggestion in another thread that the workunit can be backed up > manually and then copied back if needed. I will give that a try. Sigh .. nice idea but no cigar. Boinc seems to keep track of what units it is working on. A restore has no effect if a new model has been downloaded already. My workunit appears to have been toasted when I killed another users logon session under Win XP home. BOINC on my session appeared to be frozen. I suspect that it was running in the other users session. After killing that session and restarting BOINC the CPDN app reported a corrupt or missing file and downnloaded a new model. |
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