CPDN

Section supporting all the various Climate Change projects: CPDN, CPDN Beta, Quake Catcher.
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UBT - Chris Suddick
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CPDN

Post by UBT - Chris Suddick » Tue Jan 19, 2021 10:12 am

Hi,

Is there a secret incantation one needs to do CPDN? I enabled it at new year and left it calling for work but I have got nothing. The server status says everything is running and there are tasks ready to send. I have a 3 day cache and I've set the priority to 100. The only other thing I have running is TNGrid at priority 0 but still no CPDN. I have reset the project, removed it and added it but still nothing. I don't know what else to try.

Any ideas?

Chris.

UBT - Timbo
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Re: CPDN

Post by UBT - Timbo » Tue Jan 19, 2021 11:44 am

Hi Chris

I don't think there's any special "extra" downloads required (such as V. Studio, which some projects need) in order for your Windows host(s)* to get crunching...though I do seem to recall that CPDN allowed you to choose specific sub-project tasks...but I just logged in and I can't see that in the "cpdn preferences" part of my account. :-(

But there is only one sub-project now with tasks: UK Met Office HadAM4 at N216 resolution, but the website says they only have less than 6,000 tasks ready to send...so maybe you just need to be patient?

I do recall that some sub-projects need a very long time to crunch each task - in some cases weeks !! So, a 3 day cache might need extending - so try 5+5 and see if that helps solve the issue? If not, try 10+10...

regards
Tim

* Updated as Linux does need additional libraries - see Chris C's posting below

Woodles
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Re: CPDN

Post by Woodles » Tue Jan 19, 2021 4:46 pm

The problem is that at the moment CPDN only has work for Linux machines and I believe all your hosts are Windows?

A small cache is fine but you'll only get enough work for one task per core.

Also be aware that if you do get tasks, they take a VERY long time (months!) and require a lot of disc space.

UBT - Chris Suddick
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Re: CPDN

Post by UBT - Chris Suddick » Wed Jan 20, 2021 3:18 pm

Thanks, Mark. That makes more sense. It would be nice if the message in the log file mentioned that rather than just saying '0 tasks received'.

I'll leave it open in case the situation changes and just get on with TNGrid for now. I rather fancied having CPDN as a long background task that could be suspended for the duration of each of the FB sprints throughout the year.

Chris.

chriscambridge
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Re: CPDN

Post by chriscambridge » Sat Feb 06, 2021 2:25 am

If you leave your Windows host requesting work, eventually (every few months) Windows tasks are issued but they do go pretty quickly. I have found them seem to run far quicker than the Linux ones.

Also if you running on Linux you *must install the 32 bit libraries for CPDN to work correctly.

INSTALL CPDN 32BIT LIBRARIES FOR UBUNTU 18.04/19.04, AND MINT 19 (Cinnamon):

Code: Select all

sudo  apt-get  install  lib32ncurses5  lib32z1  lib32stdc++-6-dev
INSTALL CPDN 32BIT LIBRARIES FOR UBUNTU 19.10/20.04 + MINT 20 (Ulyana):

Code: Select all

sudo  apt-get  install  lib32ncurses6  lib32z1  lib32stdc++-7-dev
INSTALL CPDN 32BIT LIBRARIES FOR OTHER OS:

https://www.cpdn.org/forum_thread.php?id=8916
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