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Kai Strang
 
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2008-10-22 09:51:15

Update to the above post:

BBC and CPDN trickles and uploads are failing. Milo has had to turn off all BOINC services for both projects so the database isn't updated while he makes a copy of it. If possible please suspend BOINC network activity until the server status page is available and shows the upload server programs working.

Is there any "insider info" on when BOINC CPDN will probably be back?
mo.v
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2008-11-07 23:30:58
last modified: 2008-11-07 23:31:40

Apologies for not replying to your post! I don't copy every CPDN news item to this forum. For more complete CPDN news it's a good idea to subscribe to the News thread on the CPDN independent forum or the CPDN-BOINC forum.

But news items about that earlier outage have now been archived and deleted from the CPDN forum News threads.
mo.v
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2008-11-07 23:34:06


Please see the CPDN website index page for details of a planned server maintenance outage on Monday 10 Nov. Members who can do so should suspend BOINC network activity before the outage begins. Credits will probably not be exported to the stats sites until Tuesday or Wednesday.

On the index page there's also a link to download a lecture by Myles Allen, CPDN's principal researcher.

The RSS news feed from the index page was broken but should now be working properly.
mo.v
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2008-11-12 12:08:57

CPDN main project and BBC

Milo says 'The database and BOINC daemons are now back on line - thanks again for everyone's patience.'.
mo.v
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2008-11-12 12:11:33
last modified: 2008-11-12 12:12:20

mo.v
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2009-01-29 11:56:32

A CPDN credit-calculating script hasn't been working properly. Milo's already isolated one problem. There may also be delays in the transfer of Beta members' credits to our CPDN accounts. So for the next few days our recent CPDN credits will be temporarily missing or delayed on the stats sites.
mo.v
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2009-01-31 13:42:08

CPDN main project and Beta

Update of announcement made on 24 October in the CPDN forum news threads.

HADCM 6.02 (from CPDN) and HADRM 6.00 spinup models (from Beta) accumulate their .nc files and do not regularly delete them as they should. These models' folders become larger and larger as they progress. So large that some of these models will crash because they use up all the disk space allocated to BOINC. There is a description of the problem and detailed instructions for manually deleting the .nc files here. In that thread please also read Richard Haselgrove's post as he points out the safest and easiest time to delete the files.
Saenger
 
Tester - Translator
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2009-03-12 12:52:33

From the phpBB Forum:
Thu 12 Mar, 2009 1:14 pm
CPDN main project

Tolu has taken down at least one CPDN server, climateapps2, while he generates more workunits. At the moment at least some members' trickle-ups are failing and there's no CPDN-BOINC forum. It would be a good idea to suspend BOINC network activity temporarily if you can.
Grüße vom Sänger
mo.v
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2009-04-14 12:22:18

CPDN main project

Milo has run a series of tests to find out what caused the recent server problems. These have revealed a motherboard fault. The project will be unavailable until the board can be replaced. We are unable to say when the server will return to normal service at this time.

The CPDN BOINC pages and forum run on climateapps2 and are inaccessible. Requests for advice should be posted to the independent forum where separate registration is required.

If you cannot upload trickles please suspend BOINC network activity as much as possible to avoid repeated failed attempts.

There will be no credit exports to the stats sites until the problem is resolved.
mo.v
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2009-04-17 18:00:16

CPDN main project

Moderator Thyme Lawn says

'The new climateapps2 server is up and running but is under very heavy load.

Access to the web pages which require database access (including server status, user account pages and the message boards) is very slow and will sometimes time out. If the requested page is displayed it might not have the appearance we're all used to (caused by the content being displayed without the CSS file which controls the layout).

Scheduler requests are being accepted but there might be a delay before credits are updated.

Thanks to everyone for their patience during this outage.'

mo.v
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2009-06-18 10:55:28
last modified: 2009-06-18 11:37:31

CPDN main project

Please see the CPDN forum News threads for detailed updates about the recent server problems affecting uploads of HadAM3P zip files. The News threads are here and here. We advise members to enable emails from the project in their accounts and to subscribe to one of those threads.
mo.v
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2009-06-29 13:30:32

Our CPDN credits haven't been exported to the stats sites for several days. The credit script had generated a lock file and stopped working. Milo has corrected this and reenabled the script. He will see whether it runs automatically as it should an hour or two from now. If it doesn't he'll run it manually. Our big credit spike should then appear on the stats sites on Tuesday.
mo.v
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2009-07-28 12:22:13

BBC Climate Change Experiment

The BBC CCE project is being shut down. All models which are still running will be sent a killer trickle next time they send a message to the scheduler and you should not attempt to restore from backup. The scheduler and upload servers will be disabled at the end of this week and you will not be able to return any more trickles or upload files after that happens.

The results which have been returned will be used as part of a submission to the IPCC AR5 (Intergovernmental Panel on Climate Change Fifth Assessment Report). Carl Christensen is working part-time for CPDN on this and is adapting the model to collect some further data for the submission. This will be released on the main CPDN project.

Any BBC CCE users who have yet to sign up for the main project should follow the instructions here
mo.v
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2009-08-01 19:02:43
last modified: 2009-08-01 19:09:04

CPDN main project

You may have noticed that Carl is back working for CPDN in Oxford with Tolu and Milo. He is still working part-time for the Quake Catcher Network Boinc project at Stanford University. The extra manpower is long overdue and very welcome.

He has been optimising the credit scripts which were taking up to 8 hours to run each day and causing serious database slowdowns which you will have noticed when you attempted to access the CPDN-Boinc forum and your model web pages or edit your account preferences at certain times of day. This big job has coincided with the installation of the new server and the closing of the BBC project.

Carl thinks he will have the credit scripts running again 'early next week'. Our credits should begin to appear on the stats sites a day after that depending on how quickly the new scripts process the acccumulated backlog.

SAP

Any unfinished Seasonal Attribution Project models should be completed as quickly as possible. The moderators would not be surprised if this project is also closed soon to optimise the use of server resources.
mo.v
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2009-08-03 12:20:47

CPDN main project

Milo has restarted climateapps3.oucs so all CPDN servers are now running.

The migration of the database to the new server has been postponed to next week at the earliest ie 10 August or later. This will involve a server shutdown. Please subscribe to a CPDN forum News thread (eg here) and in your account enable emails from the project to receive advance email notification of announcements about this.

Milo says that the combination of Carl's code revision and the new server has resulted in a credit calculation of around only half an hour. But the new scripts can only be activated when the new server starts running. Until then the old scripts will run but only about twice a week. So our credits will only be exported to the stats sites twice a week until the new server is installed.
mo.v
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2009-08-13 20:43:26
last modified: 2009-08-13 20:45:17

CPDN credits

Carl rewrote the CPDN credit scripts as part of the recent big database and server upgrade. His new scripts run much faster than the old ones. There are now, however, some credit anomalies.

* There is an inexplicable loss of a small % of our total credits. Different percentages for different members but in no case very large. This is the credit loss showing today on the stats sites. There are several possible causes. For example, Carl has archived a lot of our old data because the database had become gigantic; this archiving may have resulted in the loss of some credits. Carl has been working on the server upgrade since Sunday and does not intend to spend more time looking for these lost credits!

* The Boinc cross-project comparison table shows that CPDN has been awarding credits at a lower rate than most other projects including Seti. CPDN also has a 'reference computer' used to compare credit given by Seti and CPDN. Our programmers can calculate credit comparisons per processing hour on the same computer.

Why compare with Seti? Because 1) it's the original Boinc project 2) when CPDN migrated to Boinc our credits were set at levels similar to Seti 3) the Seti programmers have taken many steps to avoid inflation or deflation of the value of their credits.

So Carl has decided to increase the credits awarded for all models by 5%. This increase has already been implemented retrospectively, which should compensate for the inexplicable loss. (So today's negative figures on the stats sites should be reversed tomorrow or on Saturday.) And in future we'll earn 5% more than before.

* Credits for each completed model type have been increased as follows:

  • HadAM3 was 5,184.00, now 5,443.20, +5%
  • HadAM3P was 1,982.64, now 2,081.77, +5%
  • HadCM3 (80 year) was 24,883.20, now 49,766.40, +5%
  • HadCM3 (160 year) was 49,766.40, now 52,254.72, +5%
  • HadSM3 was 6,805.26, now 7,145.52, +5%
  • HadSM3MH was 9,073.68, now 9,527.36, +5%


Credits per trickle will of course also increase by 5%.

mo.v
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2009-12-08 19:27:22
last modified: 2009-12-08 19:37:58

mo.v
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2009-12-08 21:39:03
last modified: 2009-12-08 21:39:37


CPDN main project

Milo posted today in the CPDN website news:

For some time the Recent Average Credit calculations for one particular model type (HadAM3P) have been too high. We've been working on this problem and have deployed an adjustment to the credit calculation scripts that should correct it. Actual credits will be unaffected by this fix. We expect the corrected RAC values to start showing up on the various BOINC stats sites within 24 hours.



However, the stats site lists for total CPDN credit are chaotic this evening. Some members have lost millions of credits. Others have, I think, lost nothing. I don't know why this has happened but Milo has been informed and he will look at the problem tomorrow (Wednesday).


mo.v
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2009-12-09 18:32:17


Today's CPDN credit export to the stats sites has restored the credits accidentally deducted yesterday.
mo.v
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2010-01-21 16:55:16


After a number of server problems during the last few days Milo now has all the servers up and running again. The credit scripts have been stopped or delayed for several days but tomorrow (Friday) we should again see our totals exported to the credit websites.
mo.v
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2010-03-28 01:41:21


Millennium Project

CPDN has launched new models called FAMOUS which will contribute to the European multidisciplinary experiment involving 16 countries and many universities. The Millennium website explains how the climate of the last millennium will be analysed using climate models and proxy data. The CPDN modelling contribution is described here and its lead researcher is Dr Hiro Yamazaki at Oxford University.

The very long FAMOUS models are distributed in 200-year segments each of which at the end generates a restart dump from which the next 200-year period can begin. They are available on all platforms. At the moment the models run very fast, taking less than 130 hours on a C2D 6600. A slower version is, however, being beta-tested in order to improve model stability.

A small proportion of these models do crash and should not be restored from backup. Members will as usual receive credit for the trickles they upload at the end of each model year.

FAMOUS can only run on computers with SSE2 capability. SSE is not sufficient. You can check whether your processor has SSE2 by looking at your Boinc manager messages about 8 lines from the top. This also applies to HadAM3P models. Computers without SSE2 should select HadSM models.

As well as the globe graphics, Tolu is developing sophisticated graphs which will later become available on models' web pages.

If you wish to try FAMOUS you can select it in the ClimatePrediction section of your CPDN account.

Members who run these models should follow the News thread of either the CPDN independent forum (where separate registration is required) or the CPDN-Boinc forum in the Number Crunching section. That is where further detailed announcements will be posted.
Euphoriabuzz
    Donator
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2010-03-28 13:01:14

Thanks for the info Mo













mo.v
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2010-06-11 18:45:59
last modified: 2010-06-11 18:46:56

FAMOUS v.6.10 MILLENNIUM models


  • Available on all platforms.
  • You may need to select it in the climateprediction.net preferences of your account.
  • FAMOUS takes about 9 days crunching 24/7 on a fairly fast computer.
  • 200 model years.
  • These 200-year segments form part of models lasting 1600 years. After completion the segments are stitched together.
  • The first 200 years, 599 - 799, are a spinup or settling-down period which allows climatic conditions to stabilise.
  • The deadline for these models is three months which is much shorter than for other model types. This is because CPDN needs the results back as quickly as possible to stitch the segments together.
  • Files are uploaded every five model years ie 20 files in total.
  • Trickles are uploaded every model year ie 200 trickles.
  • As v.6.10 processes more slowly than the previous CPDN version, credits have been increased to maintain parity with other CPDN models. (If you crunched the earlier version models you will also receive the increased credits for them.)
  • At the moment CPDN FAMOUS displays the traditional graphics as for other model types. New graphics are being developed in conjunction with Sony Labs in Paris but are still being beta-tested. They will be released on CPDN in a future FAMOUS version.
  • Each FAMOUS task web page, reached from our computer's task list in our account, displays new interactive graphs. They include clickable red dots for volcanic eruptions. Here is a historical list of Large Volcanic Eruptions.
  • The graphs display in most browsers but not in Internet Explorer 7 (Windows). You can upgrade to IE 8 at no cost. If you have XP please upgrade to IE 8 in case you are not able to when Windows support for XP stops soon.
  • Some FAMOUS models crash, typically with exit code 22 and messages including 'INVALID THETA' or 'NEGATIVE PRESSURE', because of instabilities that develop with some combinations of parameter values. Please do not restore backups of models and rerun them after model instability crashes. On the same platform with the same operating system the models would crash again at the same point. (Reminder: if your models crash with other exit codes eg -186 or -226 you should post on the forum for advice.)
  • If your multicore computer is also running other model types you may still wish to make backups to help ensure completion of the other models.
  • FAMOUS does not use enormous amounts of memory. Most multicore computers should be able to load all cores with FAMOUS and run them simultaneously. (Reminder: on a multicore computer with 4 or more cores don't fully load with HadAM3P as they will slow each other down, in a few cases disastrously.)
  • A future FAMOUS version is expected to be hyperthreaded.
  • You can read about the Millennium Experiment led by Dr Hiro Yamazaki at Oxford University here. Here is the website of The Millennium Project which is pan-European and multidisciplinary.


Thank you to all members who are helping to advance this large research project.

mo.v
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2010-06-29 19:07:24
last modified: 2010-06-29 19:19:53

As Iain Inglis has said in the CPDN forum news:


There are two CPDN news announcements, which subscribers to the RSS feed may already have seen:

Myles Allen wins the Appleton Medal

Retirement of HadSM3 and HadAM3P models



Regional HadAM3P models are in beta testing. When they are launched on the main CPDN project members will again have a model choice.

Please complete all the models you have already downloaded.
mo.v
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2010-07-21 10:10:22
last modified: 2010-07-21 10:17:46

CPDN logo mugs

You may have seen from the news on the climateprediction.net index page that climateprediction.net logo + globe mugs are now available from the CafePress shop. I have one and like it. The cost of shipping is the same whether one orders one mug or more. Each purchase will provide US$2 profit towards CPDN's operating costs.




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