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Message boards :
Number crunching :
WU config error : Maximum CPU time exceeded
(Message 47926)
Posted 4 Jan 2014 by  mo.v
Post: I can't understand why this model crashed. It's a perfectly normal computer and the trickle times ie processing times are good. If the model got into a loop and stayed stuck there for a long time, that would eventually result in BOINC aborting the model with this error if the model didn't abort itself first. But the trickle times show no evidence of any persistent loop. Other computers have completed models that appear to be from the same batch and took three or four times longer to process. Could the error possibly be caused by the fact that this computer still has BOINC v.5? |
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Message boards :
Number crunching :
Project has no tasks available
(Message 47907)
Posted 1 Jan 2014 by mo.v
Post: Thanks for the suggestions, Jim. Some extra suggestions: * increase the work buffer to 10 days (though you have to make sure you don't get too much work from too many projects). * if you see that tasks are available and you're really keen to grab some you can temporarily suspend tasks from OTHER projects * if for any reason you suspend work from a project, BOINC prevents that project from fetching new tasks * if you can't get hold of new CPDN tasks, do consider joining other projects as well. Find them in the Tools menu of BOINC Manager. The projects listed there are all considered safe and reputable by the people in charge of BOINC at the Uni of California at Berkeley * check in the climateprediction.net preferences of your account that you've enabled all the model types you want. At the moment the model types are Hadcm3m, which is longish, and all regions of Hadam3p (Europe, Pacific North West, South Africa and we hope some Australia & NZ). If you want anything available just enable them all * if you're running BOINC tasks on a laptop make sure you're not letting it overheat by simultaneously running too many tasks for the machine's fans to cope with. Check temps by downloading (for example) Core Temp and also, if you're running GPU tasks for another project, GPU Temp. If you don't like the look of the temperatures, members here will advise you about what to do |
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Questions and Answers :
Windows :
Multiple download errors
(Message 47897)
Posted 30 Dec 2013 by mo.v
Post: Some 12 minutes ago I received an email notification re my post two above this, so this does seem to be working. |
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64)
Questions and Answers :
Getting started :
climateprediction.net showing "No work available to process"
(Message 47896)
Posted 30 Dec 2013 by mo.v
Post: Hi Michael Here are your attached computers: http://climateapps2.oerc.ox.ac.uk/cpdnboinc/hosts_user.php?userid=91745 Are you hoping to transfer some unstarted or unfinished tasks from computer Rank 1 to computer Rank 3? If this is what you want to do, are either or both of these computers also crunching work for other projects eg Einstein? (Don't try to do anything before receiving detailed instructions.) |
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65)
Questions and Answers :
Windows :
Multiple download errors
(Message 47892)
Posted 30 Dec 2013 by mo.v
Post: I've just subscribed to this topic and am posting to test whether I receive an email notification. |
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66)
Message boards :
Number crunching :
MORE DOWNLOAD ERRORS
(Message 47849)
Posted 23 Dec 2013 by mo.v
Post: I've also just had a zombie d/l failure. Again, the task numbers within this workunit are not as they should be. |
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67)
Message boards :
Cafe CPDN :
Happy Christmas, happy holidays and happy new year!
(Message 47838)
Posted 22 Dec 2013 by mo.v
Post: The Guardian newspaper in its constant pursuit of truth has investigated how different people spend Christmas in the UK. 33% of pets receive a stocking full of Christmas presents. 7% of pets receive clothes as gifts. Last year in the UK 1548 people sent in their online tax return on 25 December. 10% of people start drinking alcohol before 9am. 7% of Brits have needed to claim on their home insurance after causing drunken damage on Christmas Day. 56% of people plan to check their work emails on Christmas Day. About 20% fewer women go into hospital to give birth on Christmas Day than the day before. This year I have received a Christmas card from a dog so I believe it all. Best wishes to all our crunchers! |
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Questions and Answers :
Wish list :
Smaller Work Units
(Message 47837)
Posted 22 Dec 2013 by mo.v
Post: Hola Gallo Azul Both the regional Hadam and the global Hadcm models are already divided up, so each task is already part of a much longer climate run. I don't think Andy, our programmer, intends to divide the long climate models into smaller sections. The more pieces each long climate run consists of, the more difficult it is to ensure that every part is processed and the more server storage space is required. Alex, I think the real problem at the moment is that although the regional Hadam models are usually reliable, too many of the Hadcm global models fail at 25%, 50% etc at the end of each model decade. This stability problem doesn't depend on whether we crunch complete models or slice them up. |
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69)
Message boards :
Number crunching :
MORE DOWNLOAD ERRORS
(Message 47836)
Posted 22 Dec 2013 by mo.v
Post: The real reason for the download failure was: WU download error: couldn't get input files and the explanation for this is in Iain Inglis's post four above this. The task must have tried and tried to get all its files before the download timed out. The numbering of tasks in this batch of workunits appears chaotic, or perhaps it's the order in which they are sent out that's chaotic. It several workunits that I've looked at the _2 task was sent out first. They are all part of the defective batch created on 16 and 17 July 2012. |
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Message boards :
climateprediction.net Science :
Myles Allen views on 5th Assessment Report
(Message 47831)
Posted 21 Dec 2013 by mo.v
Post: Here are live links for Crandles' post: http://data.parliament.uk/writtenevidence/WrittenEvidence.svc/EvidenceHtml/4280 http://www.theguardian.com/environment/2013/nov/26/green-levies-crap-carbon-burial-fossil-fuels http://www.dailymail.co.uk/news/article-2331057/Why-I-think-wasting-billions-global-warming-British-climate-scientist.html If Myles can choose which newspaper to publish an article in I think he picks The Guardian, but he may feel that readers of the Daily Mail can't be ignored: the biggest three newspapers online worldwide are to my knowledge the New York Times, the Daily Mail and The Guardian in that order. But I hope the comments at the bottom of the DM article aren't typical of the majority of readers there. I don't know much about carbon capture and storage but haven't come across many articles showing that the technology's advancing. I hope Myles' optimism in this regard is well-founded. My Christmas 'holiday' reading is going to be The Burning Question because I heard one of the authors, Duncan Clark, speaking at a meeting a couple of months ago and was favourably impressed. After I've read that I may be slightly better informed about CCS. |
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Message boards :
climateprediction.net Science :
9th BOINC workshop
(Message 47351)
Posted 18 Oct 2013 by mo.v
Post: I wasn't there so I'm relaying information available to us all. This year's workshop took place in Grenoble from 15 - 17 September 2013. Andy attended from CPDN. You can read a summary of the events here. There are links to videos of many of the talks plus an interesting pdf of Andy's slides. The new data portal he mentions was recently designed and set up by Milo working temporarily and part-time for CPDN. He was our programmer before Andy and Jonathan started. Milo says that the data portal he had built previously had become largely dysfunctional. The new portal is primarily for use by researchers. You will see from Andy's presentation that new regional model areas are in development; the new portal will allow researchers in these areas to access model data directly. |
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Message boards :
climateprediction.net Science :
Misconfiguration e-mail
(Message 47349)
Posted 18 Oct 2013 by mo.v
Post: Joe, when you've followed Geophi's advice could you please let us know so we can ask the CPDN programmers to reenable your computer's model downloads. |
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Message boards :
Cafe CPDN :
50:1 Project
(Message 47346)
Posted 18 Oct 2013 by mo.v
Post: I'm not saying that carbon taxes are the only or the best way of reducing our GHG output, but this video is astounding in many of its premises and the collection of sceptics the 50:1 project pulls together. They even manage to quote the Stern Report in such a way as to argue the opposite of what Stern intended. Marc Morano appears to be an ex-employee of Jim Imhofe: http://en.wikipedia.org/wiki/Marc_Morano Joannenova is author of The Skeptics' Handbook: http://en.wikipedia.org/wiki/Joanne_Nova Her estimate of climate sensitivity looks to me highly improbable. David Evans, the so-called rocket scientist: http://denierlist.wordpress.com/2013/02/26/dr-david-evans/ Professor Christopher Essex of the Uni of Western Ontario. They love him at the Heartland Institute: http://heartland.org/christopher-essex Fred Singer: http://www.skepticalscience.com/skeptic_Fred_Singer.htm Donna Laframboise maintains that there's no scientific consensus about global warming: http://en.wikipedia.org/wiki/Donna_Laframboise To end up, Anthony Watts himself. He thinks climate change and warming may be a good thing for us: http://wattsupwiththat.com/author/wattsupwiththat/ |
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Message boards :
climateprediction.net Science :
Climate models may be wrong
(Message 47339)
Posted 18 Oct 2013 by mo.v
Post: I've come to this discussion rather late but have read all the comments with interest. Last year I went to a Royal Society meeting on Handling uncertainty in weather and climate prediction: http://royalsociety.org/events/2012/uncertainty-weather-climate/ You can click on the + next to each speaker's name to see their biography and listen to an mp3 recording of their talk. Unfortunately this doesn't include the PP visual presentations that most of them made but the recorded talks are still interesting. You will see that there were two speakers from Georgia Tech: Professor Peter Webster and Professor Judith Curry. They sat together for the whole two days. Peter Webster talked in detail about climate risks and climate mitigation work he's carried out in the Indian subcontinent. It was interesting. On the second afternoon of the conference it was Judith Curry's turn. She spent almost the whole 20 minutes denigrating climate models and had several PP slides that included denigrating little jokes. Several times she repeated the phrase that climate models are 'not fit for purpose'. As far as I remember she mentioned no climate model type by name (there are half-a-dozen main types as well as our UK Met Office model types). Nor did she talk about specific lacunae or errors of fact or design. When it came to questions I wanted to get up and say that I'm a moderator for climateprediction and could she please tell me whether I'm doing a useful thing or wasting my time helping volunteers to run climate models. Unfortunately I didn't dare as I was a non-specialist in a meeting where there were so many experts. And then among the questions Peter Webster said that there are climatologists with a financial interest in running climate models. Yes, you read me right. The whole room was openmouthed with astonishment and then a general shocked buzz broke out. It lasted until Tim Palmer took the reins again and made a few conciliatory comments to get the meeting back on track again. A few months ago I told our CPDN boss Myles Allen what JC and PW had said. He had a bit of a laugh. I'm not a climatologist but I try to keep up-to-date with what's going on in climate research. I see no evidence that anyone in Oxford is amassing wealth on the back of the models we crunch. On the contrary, Andy has explained how the research grants never really include enough money for what the programmers need. I see that Myles is among the 20 most-cited climatologists world-wide. The attribution work of the CPDN team is held in high regard by Peter Stott at the Met Office who has command of a vast amount of data. All the climate modellers hedge everything they say with cautions about the probable range of uncertainties involved. So I conclude that I am not wasting my time and that our models produce data for a lot of solid research. But the next time something like that happens at a meeting I will not hesitate to ask my question. |
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Message boards :
climateprediction.net Science :
Misconfiguration e-mail
(Message 47148)
Posted 21 Sep 2013 by mo.v
Post: Hi Lockleys If you don't mind I'm going to start another thread for members to tell us about computers they've come across that crash lots of models. The new thread should probably really be started in Number Crunching but I'm going to create it in the Science section so it's near this Misconfiguration thread. There used to be a thread to report computers but let's start afresh. It doesn't help members posting about model crash problems to have reports about other problem computers interspersed. Here is the new thread. |
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76)
Message boards :
climateprediction.net Science :
Misconfiguration e-mail
(Message 47147)
Posted 21 Sep 2013 by mo.v
Post: Hello Tednetbook Thank you for posting. Here are your tasks: http://climateapps2.oerc.ox.ac.uk/cpdnboinc/results.php?hostid=1186330 The models you're running at the moment seem to be doing nicely but quite a few models have crashed in the past on this computer (your other's doing very well). If you look at the computer's page of tasks, then click on a task's (model's) ID in the left-hand column, then on the model page click on stderr+ you'll see the BOINC messages for that model/task. Not all of the messages are errors! BOINC doesn't always produce exactly the same error code for tasks that crash at the same moment, probably caused by the same problem. In addition, some error codes can be caused by lots of different problems, so it isn't always easy to diagnose definite problems. However, I see that more than once more than one model seems to have crashed at the same time. Some crashed models in this category have the error code 25. Code 25 can be caused by the whole computer crashing eg a bluescreen event, or by the computer spontaneously restarting or shutting down without your permission. Has this computer in fact suffered this problem occasionally? If this is the case I'd recommend some general stability testing and cleaning up. Run Disk Cleanup, Defragmenter, Windows own memory tester, Chkdsk. If you can't find any of these programs on the computer ask us where they are please. Do all of this after suspending all the tasks in BOINC Manager then exiting from BOINC completely. To exit completely, right-click on the BOINC icon in the System Tray (notification area) then select Exit. The icon will disappear. Another possible cause of crashed models could be that you don't usually completely exit from BOINC before shutting down or restarting the computer. It isn't intuitively obvious that this should be done, but not exiting from BOINC before shutting down will sooner or later crash some models. It's also a good idea to exclude BOINC from the computer's antivirus scans. Or else only allow the AV to carry out scans when you choose (rather than according to a schedule when BOINC could be running), and exit from BOINC before running scans. Please let us know how you're getting on with this so we can ask Jonathan to unminus your computer asap. |
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77)
Message boards :
Number crunching :
Task won't finish?
(Message 47146)
Posted 21 Sep 2013 by mo.v
Post: Felix, your model's web page shows that it finished at 1036,800 timesteps which is the correct number for a completed model. This means it will have generated and uploaded its four decadal files (one at the end of each 10 years); these files contain the data that the researchers need. These hadcm models never reach 100% progress while processing and never complete the number of timesteps that are stated in the models' graphics window. Our hadcm models finish at the end of 6 December in the final year, but this is not at the last timestep listed. I think this is an error in the graphics window that should probably be corrected (the total number of timesteps is slightly smaller than it says in the graphics). |
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78)
Message boards :
Number crunching :
hadcm3n failed at 1%
(Message 47145)
Posted 21 Sep 2013 by mo.v
Post: I don't think that limiting CPU use to 10% could affect the success of your climate models. If people join CPDN through the Weather@home website or through Progress Thru Processors, their CPU usage will be set by default to 60%. That's in case people are running the project on laptops and don't realise that they need to take action to avoid overheating. So limiting CPU usage is frequently used and BOINC is designed for this. When you shut down your computer do you first suspend your tasks in BOINC Manager and then exit completely from BOINC? You can exit by right-clicking on the BOINC icon in the system tray, then selecting Exit. Not exiting from BOINC before computer shutdown will sooner or later cause the occasional model to crash. |
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79)
Message boards :
Number crunching :
Credit Issue Resolved. Thanks and Well Done!
(Message 47144)
Posted 21 Sep 2013 by mo.v
Post: Metalius, it was decided a year or two ago (I can't remember exactly), long before the recent credits problem, only to run the credit script I think three or four times per week. That was a deliberate decision, not a bug. I don't know whether Jonathan and Andy will now want to run the script every day or just a few times each week. If they take the alternate-day decision it will be understandable because of the long-running nature of the script, as explained by Richard. |
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80)
Message boards :
Number crunching :
37.384 Credits Minus. Why?
(Message 47142)
Posted 21 Sep 2013 by mo.v
Post: Rolf said: Until 18 September 2013 I had 114,004 CPDN credits. Here they are on BoincStats. But on 19 Sep I only had 76,620 credits left. The difference of -37,384 is exactly what I had earned at CPDN Beta. CPDN (76.620) + CPDN Beta (37.384) = 114.004 credits. Previously the credit results from both CPDN and CPDN Beta were added together although they were two separate BOINC projects. Previously the credits from both projects were totalled wrongly, but they are now totalled correctly. ..... My current credits are correct. |
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