climateprediction.net home page
Posts by Rick B

Posts by Rick B

1) Message boards : Cafe CPDN : Milestones Thread (Message 39011)
Posted 25 Feb 2010 by Profile Rick B
Post:
I\'ve passed the 1/2 Million mark Today for CPDN and soon will hit the Million for Boinc Total.
2) Message boards : Cafe CPDN : Milestones Thread (Message 38863)
Posted 5 Feb 2010 by Profile Rick B
Post:
I finally made it! 500,000 credits. And it only took 3 years. :-)


Congrats Jim. Ill be there sometime in the next month.
3) Message boards : Number crunching : Taking a computer offline (Message 38697)
Posted 13 Jan 2010 by Profile Rick B
Post:
You could create a cc_config.xml file, and change the <ncpus>N</ncpus>-setting. This can be used to fool the client into thinking your computer has more cores than actually available. This setting is intended for testing and, I think, will result in N models running. When you have downloaded enough models I, therefore recommend changing this setting back or deleting/renaming the cc_config.xml file. For more info on this config file, click this link: cc_config.xml


I read that info and to be honest it is mostly foreign to me. I have manually added xml files to my seti folder in the past but to actually write one is a bit beyond my ability at this point. Any other leads to read?
4) Message boards : Number crunching : Taking a computer offline (Message 38675)
Posted 12 Jan 2010 by Profile Rick B
Post:
I\'d advise a connection about every 5 weeks if you can do it.

You\'d have to make sure the computer has plenty of work in advance to get on with. If this is likely to be a problem let us know because there may still be a way to edit a file to trick the server into thinking the machine has more cores than in reality. This makes the server send extra work, way above usual. (Not advisable of course for most circumstances.)


Ive set the preferences on that host to 10 days yesterday got one additional work unit and currently have 3 x hadsm3 work units. One at 57%, one at 5% and one at 0%. Total projected hours ~ 840 hrs. With 2 cores I will be out of work for one of the cores in ~ 485 hrs (~20 Days). How do we go about increasing the downloads so I can get about 30 - 45 days work? I should be able to connect it monthly to keep things current.
5) Message boards : Number crunching : Taking a computer offline (Message 38662)
Posted 11 Jan 2010 by Profile Rick B
Post:
Im taking one of my computers offline to add a graphics card and use as a golf simulater. The new location will not allow constant internet hookup and it will have to be manually moved to update the trickles/credits/zip files/new work units etc. My question is how long can I go without it connected and still succesfully run cpdn projects?
6) Message boards : Number crunching : Waiting for Memory (Message 38404)
Posted 27 Nov 2009 by Profile Rick B
Post:
If the computer that now has extra memory processes another HadAM in future it will be interesting to see whether the crunching is faster.


Well the results are in. Well not really.

Im not sure we can say that the increased RAM had any effect on the time to process.

This Computer has only done 2 hadam3p\'s. The first with 500 Meg RAM it did in 405,934.5 seconds (112.8 hrs). The second with 2.5 Gig of RAM it did in 386,609.0 seconds (108.2 hrs).

Comparitively This Computer, which has the exact same CPU and has 2 Gig of RAM, has also done 2 hadam3p models with times of 353,031.8 and 355,470.3 seconds. (98.1 & 98.7 hrs)

A third Computer of mine which has a slightly slower CPU, 2.0 GHz vs 2.2 GHz, has done 24 of these hadam3p\'s. Processing times of these range from 364,930.1 to 427,558.5 seconds (101.4 to 118.8 hrs) with an average of 395,992 seconds (110.0 hrs).

The fourth Computer I have crunching has a 3.4 GHz CPU and 2 Gig of RAM and has completed 10 hadam3p work units. Its average is 373,959.2 seconds (103.9 hrs). The range is tighter on this computer though with a low of 356268.2 and a high of 387300.3 seconds. (99 to 107.6 hrs)

So the question of faster processing speed, in my opinion, is still unanswered. I dont believe I have enough data to answer that with only one work unit being crunched with 500 Meg of RAM and one at 2 Gig of RAM. To get a difinitive answer I think a work unit would have to be crunched twice with both 500 Meg and 2 Gig of Ram on the same CPU.
7) Message boards : Number crunching : Iceworld Appeal (Message 38403)
Posted 27 Nov 2009 by Profile Rick B
Post:
It looks like it has finished Iain. I wont be in to the office until after it reports. Does that mean the cpdn files wont be saved for it?

The trickles are already on the Web site and the temperature/precipitation graphs too. So the model looks like a conventional success - and no evidence of an iceworld from the graphs, just the same cool and dry climate reported by the other finisher in the work unit.

I\'m not sure at exactly what point the \'.cpdn\' files are tidied up, but they will certainly have been done by the time the model gets to report. It is a bit of a problem having to know that an iceworld is coming before turning the recording on: I try to download new models as far ahead of time as possible (the BOINC maximum is ten days), so that someone else can get ahead of me. Otherwise, the best method is to wait for an iceworld and then re-run it from backup with the recording switched on some time before the freeze (but I know that\'s a bit of a hassle).


I will get into the habit of backing up my computer in the future. (Have said that more than once over the years) If this model is of interest for you to follow (and you get hold of one of the other crunchers) I can tell you that I noticed the very odd temp displays on the last day of crunching with about 9 hrs left. I think the model date was around Sep 2064.

Keep up the good work. I follow this thread, as well as the others, closely as Climate Change and Weather Patterns are of great interest to me.
8) Message boards : Number crunching : Iceworld Appeal (Message 38401)
Posted 27 Nov 2009 by Profile Rick B
Post:
Thanks for looking at that, Rick.

The complete model in that work unit is showing a marked decline in precipitation (here) but has a complete set of temperature and precipitation data and doesn\'t slow down. So, I\'d bet that your model will finish OK, though it would appear to have an odd climate.

Tell us how it develops. Even if it finishes successfully, you could treat this model as a dry run (no pun intended) for an iceworld - see if you can find where the plaback \'.cpdn\' files are stored: there should be thousands by now. They\'re cleaned up when the model finishes.

Iain


It looks like it has finished Iain. I wont be in to the office until after it reports. Does that mean the cpdn files wont be saved for it?
9) Message boards : Number crunching : Iceworld Appeal (Message 38398)
Posted 26 Nov 2009 by Profile Rick B
Post:
Iain

I have one I am recording for you but it may not become an ice world. I see someone has completed this model and two others had computer errors. 10 copies were sent out Nov 2nd and all have some progress made. I noticed it this morning when checking the graphics that a large chunk of the Pacific Ocean was Green of the Northern Coast of South America. I have started the recording but have not done a back up of this model and therefore wont have the initial freeze points on it. It may not turn into an ice world but if it does maybe one of the other crunchers who have not gone as far into this model as I have would record it for you.

Heres the Work Unit : 6692632

This one is Mine : 953461
10) Message boards : Number crunching : Waiting for Memory (Message 38284)
Posted 7 Nov 2009 by Profile Rick B
Post:
If the computer that now has extra memory processes another HadAM in future it will be interesting to see whether the crunching is faster.


I\'ve designated that computer as \"School\" for its location and selected the HadAM3P as the prefered model to run that test. Will follow up in this thread with the results.

I also added 2G RAM to my home computer at the same time which is currently running HadSM models. It had 2G and now has 4G but Vista only uses 3.4G. Any of the models it runs in the future can be compared to past models to check the comparison to.

This Computer went from 2G Ram to 3.4G RAM Nov 5

This Computer went from 500M RAM to 2.5G RAM Nov 6
11) Message boards : Number crunching : Waiting for Memory (Message 38280)
Posted 6 Nov 2009 by Profile Rick B
Post:
To follow up with this thread the HADAM3P did finish and uploaded this morning with the 500 MB RAM. I successfully upgraded the RAM and all is back up and running. Thanks again for the help.

12) Message boards : Number crunching : Waiting for Memory (Message 38271)
Posted 5 Nov 2009 by Profile Rick B
Post:
check to make sure it\'s not cheaper just to get 2 one GB sticks and using just those instead of getting 3 more identical 512 MB sticks.


It was actually cheapest to get a 2GB stick ($40) vs 2*1GB sticks at $40 each. Ended up getting 2 and upgraded the home pc from 2 to 4 G and will add the 2 * 1GB sticks from the home computer to the work computer to take it to 2.5G

Thanks for the help

13) Message boards : Number crunching : Waiting for Memory (Message 38264)
Posted 5 Nov 2009 by Profile Rick B
Post:
It\'s hadam3 that supposedly needs 1.5 GB of RAM, not hadam3p. But hadam3p is the 2nd most memory intensive of all the models, and I could see troubles with running out of memory with it, especially if running in tandem with any other model. With only 500 MB of RAM, running even 2 hadsm3/hadsm3mh models at the same time might get kind of iffy if that PC does anything else.

But you should be able to finish the hadam3p, just maybe not when running another model type as well.


Thanks. Ive suspended all other tasks and that one will hopefully finish by tomorrow morning. In the mean time, I\'m looking into adding more RAM to that computer. Is it as simple as matching up the existing RAM and adding it to the remaining 3 slots?
14) Message boards : Number crunching : Waiting for Memory (Message 38262)
Posted 5 Nov 2009 by Profile Rick B
Post:
Ive recently added 2 New Computers and one of them has only 495 MB RAM. This Computer got 2 hadsm3mh and one hadam3p work units to crunch. The hadam3p work unit got to 81% completed then gave me the status message that it was waiting for memory. I\'ve reassigned this computer and its preferences to only ask for the other models as I see on the preferences pages that Hadm3p\'s require 1.5G memory. The model is currently running again with everything else suspended but I guess Im wondering if it will finish? Approximately 23 hrs remain to completion so time will tell ... or should I abort?

Thanks for the help

Rick
15) Message boards : Number crunching : Thread Subscriptions (Message 37497)
Posted 17 Jul 2009 by Profile Rick B
Post:
It does work for me, but only when I enabled email notification in the Community Preferences section of my account.


Thanks. I have now enabled that function.
16) Message boards : Number crunching : Thread Subscriptions (Message 37491)
Posted 17 Jul 2009 by Profile Rick B
Post:
When one is subscribed to a thread are new postings in that thread not supposed to go out to the subscribers email? The only time I see new info is when I come to the boards and have a look. I have been subscribed to the News and Announcements Thread for some time but have never received an email from it.
17) Message boards : Number crunching : INCREASED STABILITY ON WINDOWS 7? (Message 37399)
Posted 29 Jun 2009 by Profile Rick B
Post:
Hi, Everyone:

I have been running Windows 7 (first the beta and now the release candidate) since they first became available and I’ve noticed something. The models seem much more stable under Windows 7 than they did using Vista.

When I was using Vista I hardly ever got through a model with it crashing and being restored at least once. The only thing that saved me was lots of backups. Since installing Windows 7 I have had hardly a crash. The computer hardware hasn’t changed. This increased stability seems to hold true regardless of the type of WU. While most of the models that I have benn running have been HadAM3p’s, I also finished a HadCM3 and a HadSMmh. Both seemed more stable.

Has anyone else noticed this? I also wonder if Intel chips running HadSM’s on Windows 7 are less likely to produce ice worlds????





I have run several models on My Vista Computer and havent had any unstability issues. I think I had one ice world but thats about it.
18) Message boards : Number crunching : Model Dates (Message 37378)
Posted 28 Jun 2009 by Profile Rick B
Post:
A recent discussion in another projects forums discussed alternative projects and the question came up about CPDN Model Dates displayed in the screensavers. ie; 1976 - 1978 or 1996-1998. Im currently running a HADAM3P with the latter dates. The discussion questioned why past dates are used if were predicting future climates? The theories, mine included, surmized that in order to produce viable future data that models may be used to compare historical actuals thereby validating the models abilities to predict future scenarios. Or are they dates just picked out of thin air to produce a theoretical timeline?


I think Ive answered my own question.

Validation and Attribution Experiment
19) Message boards : Number crunching : Model Dates (Message 37377)
Posted 28 Jun 2009 by Profile Rick B
Post:
A recent discussion in another projects forums discussed alternative projects and the question came up about CPDN Model Dates displayed in the screensavers. ie; 1976 - 1978 or 1996-1998. Im currently running a HADAM3P with the latter dates. The discussion questioned why past dates are used if were predicting future climates? The theories, mine included, surmized that in order to produce viable future data that models may be used to compare historical actuals thereby validating the models abilities to predict future scenarios. Or are they dates just picked out of thin air to produce a theoretical timeline?
20) Message boards : Number crunching : Cheers to Milo!! (Message 37317)
Posted 20 Jun 2009 by Profile Rick B
Post:
I'd like to add Cheers to Les & M.O.V. as well for their input.


Ill add mine in here to. Congrats on the work arounds!

I have another hadam3p ready to upload (suspended for now) that Ill keep until all is fixed.

Keep up the good work


Next 20

©2019 climateprediction.net