climateprediction.net (CPDN) home page
Thread 'Very large task cannot be handled within given time'

Thread 'Very large task cannot be handled within given time'

Message boards : Number crunching : Very large task cannot be handled within given time
Message board moderation

To post messages, you must log in.

Previous · 1 · 2

AuthorMessage
old_user170894
Avatar

Send message
Joined: 3 Mar 06
Posts: 96
Credit: 353,185
RAC: 0
Message 25979 - Posted: 12 Jan 2007, 20:19:13 UTC - in response to Message 25942.  

im finding this annoying, its gonna take me 40 hours atm to do 1 year (or 1 feed back,) 5.65 s/ts

do also do other stuff on it however still gonna take sosay 3000 hours to compute, thats

125 days of non stop computing,

if at 2 hours a day
thats just over 4 years!!!

or at 4 hours a day
thats just over 2 years!!!


Not sure how long you let your machine run each day. The electricity cost and environmental impact are certainly important considerations. Take a look at ways you can reduce your electricity consumption. I worked it out and find that by drying most of my laundry the old fashioned way (on a $5 clothes line) rather than using my electric clothes dryer, I save enough to allow 5 computers to run 24/7. Also, my clothes don\'t wear out as fast since they don\'t tumble around in a dryer.

I also changed my light bulbs to the screw in fluorescent type. And I turn lights off when not needed even if they are fluorescent. If I\'m not really watching it then I turn the TV off. Most people really can do without many of the expensive conveniences of electricity. All it takes is a little resolve and a change in habits. BTW, clothes dryers are watt guzzling energy pigs compared to TV and lights so that\'s where one wants to start.

Lightweight machines can do well at the ABC@home project, abcathome.com. Their application uses 99% integer calculations rather than slower floating point calculations which really bog down older machines. Plus they are on fixed credits, like CPDN, so Linux machines don\'t get screwed. (Sorry, Clownius, BOINC 5.8.1 does give better benchmarks on Linux than previous versions but they still have a good distance to go, just my observations, YMMV). ABC@home is switching servers around this weekend, January 13, so you may not be able to attach for another day or 2.

ID: 25979 · Report as offensive     Reply Quote
old_user202664

Send message
Joined: 13 Oct 06
Posts: 60
Credit: 7,893
RAC: 0
Message 25983 - Posted: 13 Jan 2007, 0:49:00 UTC - in response to Message 25979.  

Not sure how long you let your machine run each day. The electricity cost and environmental impact are certainly important considerations. Take a look at ways you can reduce your electricity consumption. I worked it out and find that by drying most of my laundry the old fashioned way (on a $5 clothes line) rather than using my electric clothes dryer, I save enough to allow 5 computers to run 24/7. Also, my clothes don\'t wear out as fast since they don\'t tumble around in a dryer.

I also changed my light bulbs to the screw in fluorescent type. And I turn lights off when not needed even if they are fluorescent. If I\'m not really watching it then I turn the TV off. Most people really can do without many of the expensive conveniences of electricity. All it takes is a little resolve and a change in habits. BTW, clothes dryers are watt guzzling energy pigs compared to TV and lights so that\'s where one wants to start.



I\'ve been doing that for years... does that mean I can finally feel good about letting my PC do a few night shifts? :-)


Lightweight machines can do well at the ABC@home project, abcathome.com. Their application uses 99% integer calculations rather than slower floating point calculations which really bog down older machines. Plus they are on fixed credits, like CPDN, so Linux machines don\'t get screwed. (Sorry, Clownius, BOINC 5.8.1 does give better benchmarks on Linux than previous versions but they still have a good distance to go, just my observations, YMMV). ABC@home is switching servers around this weekend, January 13, so you may not be able to attach for another day or 2.


The project may be nice for older machines, or Linux boxes, but somehow it doesn\'t inspire me... I\'m starting to get a hang of maths after years of ignorance *g* but all those formulas don\'t look like something I, personally, would spend that much CPU time on when there are so many other projects out there. I hope you don\'t feel offended, this is just my personal opinion...
ID: 25983 · Report as offensive     Reply Quote
Les Bayliss
Volunteer moderator

Send message
Joined: 5 Sep 04
Posts: 7629
Credit: 24,240,330
RAC: 0
Message 26028 - Posted: 14 Jan 2007, 14:30:23 UTC

The impending arrival of BOINC 5.8.* may eliminate a lot of computers from the pack.
One of it\'s features is a test to see if the hardware resources are sufficient to run a work unit. If not, you don\'t get work for that project.

From posts on the BOINC/dev board, it seems that work units that start small, and gradually increase their useage of \'something\', will crash when this resource limit is reached, such as the amount of memory needed.
So people struggling along with 256Megs of ram may be forced to upgrade to lots more, or forget about running the project.

I guess (hope), more info will be forthcoming when it\'s released.

ID: 26028 · Report as offensive     Reply Quote
old_user170894
Avatar

Send message
Joined: 3 Mar 06
Posts: 96
Credit: 353,185
RAC: 0
Message 26031 - Posted: 14 Jan 2007, 21:12:47 UTC - in response to Message 25983.  
Last modified: 14 Jan 2007, 21:14:56 UTC

I\'m starting to get a hang of maths after years of ignorance *g* but all those formulas don\'t look like something I, personally, would spend that much CPU time on when there are so many other projects out there. I hope you don\'t feel offended, this is just my personal opinion...


Offended? Not at all. Remember mathematicians don\'t invent all those formulas just for something to do. Those formulae and other stuff are used by engineers, computer programmers, etc. to accomplish real world tasks that could could not be accomplished before, or do old tasks faster/better. Protein folding, climate predicting and alien hunting simply would not be possible without advanced maths. But hey... whatever blows yer hair back...:)

ID: 26031 · Report as offensive     Reply Quote
old_user170894
Avatar

Send message
Joined: 3 Mar 06
Posts: 96
Credit: 353,185
RAC: 0
Message 26032 - Posted: 14 Jan 2007, 21:27:49 UTC - in response to Message 26028.  

The impending arrival of BOINC 5.8.* may eliminate a lot of computers from the pack.
One of it\'s features is a test to see if the hardware resources are sufficient to run a work unit. If not, you don\'t get work for that project.


That strikes me as a good idea that will save a lot of frustration for some folks.



ID: 26032 · Report as offensive     Reply Quote
ProfileMikeMarsUK
Volunteer moderator
Avatar

Send message
Joined: 13 Jan 06
Posts: 1498
Credit: 15,613,038
RAC: 0
Message 26033 - Posted: 14 Jan 2007, 23:05:35 UTC


What worries me about it is that I saw a comment about jobs being aborted if they exceed the deadline time. That would be a disaster since deadlines aren\'t important here. Perhaps that plan has changed now (I certainly hope so).

I'm a volunteer and my views are my own.
News and Announcements and FAQ
ID: 26033 · Report as offensive     Reply Quote
old_user170894
Avatar

Send message
Joined: 3 Mar 06
Posts: 96
Credit: 353,185
RAC: 0
Message 26036 - Posted: 15 Jan 2007, 0:31:38 UTC - in response to Message 26033.  


What worries me about it is that I saw a comment about jobs being aborted if they exceed the deadline time. That would be a disaster since deadlines aren\'t important here. Perhaps that plan has changed now (I certainly hope so).


Yikes! That would be a disaster. But all it needs is a \"don\'t abort if project is CPDN\" clause. Hmmm. But what if that clause were accidentally excluded in some later version? Sounds like CPDN needs to start issuing models with ridiculously long deadlines.

ID: 26036 · Report as offensive     Reply Quote
Profileold_user215584
Avatar

Send message
Joined: 26 Dec 06
Posts: 23
Credit: 11,431
RAC: 0
Message 26042 - Posted: 15 Jan 2007, 2:05:15 UTC

My deadlines are close to a year i thought that was extremely long as it was. i should have a few done before the deadline.
ID: 26042 · Report as offensive     Reply Quote
ProfileKeck_Komputers
Avatar

Send message
Joined: 5 Aug 04
Posts: 426
Credit: 2,426,069
RAC: 0
Message 26051 - Posted: 15 Jan 2007, 12:55:20 UTC - in response to Message 26033.  


What worries me about it is that I saw a comment about jobs being aborted if they exceed the deadline time. That would be a disaster since deadlines aren\'t important here. Perhaps that plan has changed now (I certainly hope so).

I don\'t think this is being worked on yet. There is a feature that will allow tasks that have not started yet and are no longer needed to be aborted before they start, that should be out soon.
BOINC WIKI

BOINCing since 2002/12/8
ID: 26051 · Report as offensive     Reply Quote
Previous · 1 · 2

Message boards : Number crunching : Very large task cannot be handled within given time

©2024 cpdn.org