Posts by LochDhu

21) Message boards : Number crunching : Model 346646 uploaded, but not Complete (Message 8471) Posted 2 Feb 2005 by LochDhu Post: This model uploaded on Jan 31 The "in process" I'm referring to is here: http://climateapps2.oucs.ox.ac.uk/cpdnboinc/results.php?hostid=71868 The upload occurred with BOINC 4.13
22) Message boards : Number crunching : Model 346646 uploaded, but not Complete (Message 8461) Posted 2 Feb 2005 by LochDhu Post: I finished and uploaded model 346646. I did not notice any errors from BOINC. But CPDN says it's still "in progress" and the P3 graph is unavailable. I have saved the results. Did CPDN get everything to make this a scientificly successfull model?
23) Message boards : climateprediction.net Science : What parameters are causing the 8-11K temperature increase? (Message 8051) Posted 29 Jan 2005 by LochDhu Post: I remember somewhere in the Nature article it said the most sensitive parameters were the ones that had to do with cloud formation.
24) Message boards : Number crunching : Lost users due to lost WUs (Message 7545) Posted 24 Jan 2005 by LochDhu Post: > I just upgraded to 4.16 also for E@H. It reset my CPDN work unit and started > to download another. So I backed up the 4.16 BOINC and restored from backup > my 4.13. This unit is at 70%, so I'll be done with it sometime this weekend. > Then I'll restore to the 4.16 and split time between CPDN and E@H. I didn't > happen to notice the deadline on the E@H unit; I hope it doesn't expire on me. > I just learned about v4.17. I backed up again and upgraded to that. It went fine, and now CPDN and E@H are happily sharing CPU. I suspect my upgrade issue was a user error (but I don't know what I did wrong) rather than a bug in the installer.
25) Message boards : Number crunching : Lost users due to lost WUs (Message 7535) Posted 24 Jan 2005 by LochDhu Post: > Thanks Strat. > It's pretty "cool" to have no error. > > I upgraded to 4.16 to crunch for E@H (they want 4.16) and discovered this > particular unstability by chance because on my second machine 4.13 was > ultra-stable too (no error on 4 finished Wus). > I just upgraded to 4.16 also for E@H. It reset my CPDN work unit and started to download another. So I backed up the 4.16 BOINC and restored from backup my 4.13. This unit is at 70%, so I'll be done with it sometime this weekend. Then I'll restore to the 4.16 and split time between CPDN and E@H. I didn't happen to notice the deadline on the E@H unit; I hope it doesn't expire on me.
26) Message boards : Number crunching : Lost users due to lost WUs (Message 7435) Posted 21 Jan 2005 by LochDhu Post: Also, about one in 25 models fail to no fault of your own. CPDN's goal is to make Climate Prediction more accurate. Certain combinations of the 20 or so model parameters make the Earth turn into Titan (very cold). When that happens the model rewinds a day, then a month and a year to make sure this wasn't an intermittant calculation error. If all the rewinds go Titan, then it uploads and starts another. I have had only one of my 20 models go Titan, and that was on the pre-BOINC version. The only other models that have failed on me were download problems due to a firewall, so I didn't waste any processing. If you have one upload prematurely, don't worry about it. But if two in a row are short, then you probably have a hardware issue.
27) Message boards : Number crunching : backup and restore WU (models) (Message 7434) Posted 21 Jan 2005 by LochDhu Post: You need to stop the service; otherwise there will be write locks on some files. I don't know the command line way of stopping & starting a service, but I know there is one. A restore is as easy as stopping the service, and overwritting the BOINC directory with your backup, and starting again. Personally I only backup after every phase, so I do it manually.

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