climateprediction.net home page
5 months delay of returning results

5 months delay of returning results

Questions and Answers : Windows : 5 months delay of returning results
Message board moderation

To post messages, you must log in.

AuthorMessage
tito

Send message
Joined: 2 Nov 05
Posts: 7
Credit: 1,279,292
RAC: 0
Message 30948 - Posted: 14 Oct 2007, 17:31:31 UTC

Hi.
Soon i\'m going to join ship, where i will be about 5 months with NO INTERNET CONNECTION. I want to take some WU with long deadline (like CPDN), but won\'t there be any problems to validate them? According to this sticky thread, (http://climateapps2.oucs.ox.ac.uk/cpdnboinc/forum_thread.php?id=5131)after 6 weeks with no trickle WU will be marked as \"lost\". Is there a sense to take them? Will there be any science advantage? And if i will give me credits for these WU?
For now i have done it twice and there weren\'t any problems...
ID: 30948 · Report as offensive     Reply Quote
Les Bayliss
Volunteer moderator

Send message
Joined: 5 Sep 04
Posts: 7629
Credit: 24,240,330
RAC: 0
Message 30951 - Posted: 14 Oct 2007, 19:32:40 UTC


Hi tito

The problem with a model not contacting the server regularly, is that it MAY get re-issued to someone else, who MAY complete the model before you. So in this case, you would be duplicating work already done.
But the researchers sometimes issue the same model several times, in the hope that it WILL be run several times, but on different processor types, so that they can check for any computation differences.

Only the researchers would know how much value there is in different models, let alone in duplicated models.
So if this is OK with you, then go ahead and take some with you.

As for credits, yes you WILL get some, for each trickle eventually returned.

Hope you have a safe journey.


Backups: Here
ID: 30951 · Report as offensive     Reply Quote
tito

Send message
Joined: 2 Nov 05
Posts: 7
Credit: 1,279,292
RAC: 0
Message 30995 - Posted: 17 Oct 2007, 20:18:18 UTC - in response to Message 30951.  


Hi tito

The problem with a model not contacting the server regularly, is that it MAY get re-issued to someone else, who MAY complete the model before you. So in this case, you would be duplicating work already done.
But the researchers sometimes issue the same model several times, in the hope that it WILL be run several times, but on different processor types, so that they can check for any computation differences.

Only the researchers would know how much value there is in different models, let alone in duplicated models.
So if this is OK with you, then go ahead and take some with you.

As for credits, yes you WILL get some, for each trickle eventually returned.

Hope you have a safe journey.



Thank You.

Good news, couse i will have 2 additional hosts onboard :)

Best regards.

ID: 30995 · Report as offensive     Reply Quote
Profile mo.v
Volunteer moderator
Avatar

Send message
Joined: 29 Sep 04
Posts: 2363
Credit: 14,611,758
RAC: 0
Message 30996 - Posted: 17 Oct 2007, 22:16:57 UTC
Last modified: 17 Oct 2007, 22:22:40 UTC

Tito, I expect you know that in your cpdn project preferences you can select the type of model you want to download. The HadCM are the longest but you may get one that\'s 80 years, or one that\'s 160 years (you can\'t choose between 80 and 160). The HadSM slab models are much shorter.

If you find that you haven\'t got enough models to keep the computers busy for so long, you could also attach to the Seasonal Attribution Project which is a cpdn sub-project and get an SAP model from there. But the SAP models need 1Gb RAM for each model.

I assume that these computers are laptops? Laptops can heat up more than desktop computers, so put something underneath to raise the complete laptop approx 1cm above the table surface or the floor. The extra air underneath provides more cooling. Only raising the little feet at the back isn\'t sufficient when you run a laptop for long periods.

I hope your ship takes you to some interesting places.
Cpdn news
ID: 30996 · Report as offensive     Reply Quote
tito

Send message
Joined: 2 Nov 05
Posts: 7
Credit: 1,279,292
RAC: 0
Message 31006 - Posted: 18 Oct 2007, 17:11:54 UTC - in response to Message 30996.  

Tito, I expect you know that in your cpdn project preferences you can select the type of model you want to download. The HadCM are the longest but you may get one that\'s 80 years, or one that\'s 160 years (you can\'t choose between 80 and 160). The HadSM slab models are much shorter.


Already choosen:)

If you find that you haven\'t got enough models to keep the computers busy for so long, you could also attach to the Seasonal Attribution Project which is a cpdn sub-project and get an SAP model from there. But the SAP models need 1Gb RAM for each model.


Just joined :) For now i have enought work :D (If there won\'t be any crashes)

I assume that these computers are laptops? Laptops can heat up more than desktop computers, so put something underneath to raise the complete laptop approx 1cm above the table surface or the floor. The extra air underneath provides more cooling. Only raising the little feet at the back isn\'t sufficient when you run a laptop for long periods.

I hope your ship takes you to some interesting places.


Yes, they are laptops, but about cooling i know plenty thinks:) For now 2 my laptops are working 24/7/365 without any errors.

Ship\'s route is same as previous :/ No new places to visit :(

Many thanks for answers.

ID: 31006 · Report as offensive     Reply Quote
Lockleys

Send message
Joined: 13 Jan 07
Posts: 195
Credit: 10,581,566
RAC: 0
Message 31007 - Posted: 18 Oct 2007, 21:21:39 UTC - in response to Message 31006.  
Last modified: 18 Oct 2007, 21:22:48 UTC

<quote> Just joined :) For now i have enought work :D (If there won\'t be any crashes) <quote>

Don\'t forget to take backups at intervals, so if they do crash, you can restore and carry on!

Bon voyage.
ID: 31007 · Report as offensive     Reply Quote

Questions and Answers : Windows : 5 months delay of returning results

©2024 climateprediction.net