Message boards : News : New QuarkStars application

New QuarkStars application

Post to thread Subscribe


AuthorMessage
Grzegorz Wiktorowicz
Project developer
Project scientist

Send message
Joined: 25 Feb 15
Posts: 43
Credit: 5,684,705
RAC: 0
Message 1265 - Posted: 22 Jul 2016, 12:26:27 UTC

We have just started the tests of a new application. The main goal is to analyse
the possibility of observational detection of quark stars. These objects are
composed of quarks, i.e. particles smaller than neutron or proton. Quark stars are
nearly similar to neutron stars, but we may observe their impact on stellar
populations.

------------------------------------------

Właśnie uruchomiliśmy nową aplikację. Jej głównym celem jest analiza możliwości
obserwacyjnej detekcji gwiazd kwarkowych. Te obiekty składają się z kwarków,
czyli cząstek mniejszych niż neutrony czy protony. Gwiazdy kwarkowe są prawie
identyczne z gwiazdami neutronowymi, ale jest możliwe wyznaczenie ich wpływu na
populacje gwiazdowe
Grzegorz Wiktorowicz
Astronomical Observatory
University of Warsaw
ID: 1265 · Rating: 0 · rate: Rate + / Rate - Report as offensive    Reply Quote
Profile Krzysztof Piszczek - wspieram Polski projekt BOINC
Project administrator
Project developer
Project tester
Avatar

Send message
Joined: 4 Feb 15
Posts: 573
Credit: 60,033,800
RAC: 12,825
Message 1266 - Posted: 22 Jul 2016, 14:01:36 UTC - in response to Message 1265.  

QuarkStars application can use up to 350MB hard disk space in temporary files.
Krzysztof 'krzyszp' Piszczek

Member of Radioactive@Home project team
Radioactive Android Map
Tsu
ID: 1266 · Rating: 0 · rate: Rate + / Rate - Report as offensive    Reply Quote
vlado101

Send message
Joined: 29 Apr 15
Posts: 31
Credit: 4,066,082
RAC: 3,319
Message 1267 - Posted: 22 Jul 2016, 19:19:52 UTC

Is this new application compatible with Raspberry devices? If not I will have to create a separate profile for it. It did say that linux under the applications page, but just want to make sure.

Thank you
ID: 1267 · Rating: 0 · rate: Rate + / Rate - Report as offensive    Reply Quote
Profile Krzysztof Piszczek - wspieram Polski projekt BOINC
Project administrator
Project developer
Project tester
Avatar

Send message
Joined: 4 Feb 15
Posts: 573
Credit: 60,033,800
RAC: 12,825
Message 1268 - Posted: 22 Jul 2016, 22:08:38 UTC - in response to Message 1267.  

At the moment - isn't.

We have to make some batches first and look at results before we do app compilation for Android and Raspberry devices..
Krzysztof 'krzyszp' Piszczek

Member of Radioactive@Home project team
Radioactive Android Map
Tsu
ID: 1268 · Rating: 0 · rate: Rate + / Rate - Report as offensive    Reply Quote
mmonnin

Send message
Joined: 2 Jun 16
Posts: 92
Credit: 20,515,067
RAC: 212,334
Message 1269 - Posted: 22 Jul 2016, 22:29:52 UTC

It looks like I started getting these around 11am EST. I should get to some of them by tomorrow.
ID: 1269 · Rating: 0 · rate: Rate + / Rate - Report as offensive    Reply Quote
mmonnin

Send message
Joined: 2 Jun 16
Posts: 92
Credit: 20,515,067
RAC: 212,334
Message 1270 - Posted: 24 Jul 2016, 0:32:29 UTC

It seems like some units are getting sent out to quite a few users well before the deadline:
http://universeathome.pl/universe/workunit.php?wuid=6189406
http://universeathome.pl/universe/workunit.php?wuid=6255363
ID: 1270 · Rating: 0 · rate: Rate + / Rate - Report as offensive    Reply Quote
Pete Broad

Send message
Joined: 7 Jan 16
Posts: 3
Credit: 4,504,667
RAC: 0
Message 1273 - Posted: 25 Jul 2016, 11:09:55 UTC

I've had 2 of these, both were cancelled by the server, any idea why?

Pete
ID: 1273 · Rating: 0 · rate: Rate + / Rate - Report as offensive    Reply Quote
Jim1348

Send message
Joined: 28 Feb 15
Posts: 131
Credit: 18,579,406
RAC: 41,376
Message 1274 - Posted: 25 Jul 2016, 14:23:33 UTC - in response to Message 1273.  

I've had 2 of these, both were cancelled by the server, any idea why?

If you look at your Work Units that were cancelled by server, you will probably find that they were successfully completed by two other crunchers. That is what happens with projects that use a quorum, where two users must receive a work unit to validate against each other. There is always a time limit, and if one user does not return the result soon enough, they send it out to a third user (you in this case). Then, if the one user returns it before you can get to it, the server sends out an abort to your machine, so you don't waste time on it.

There may be other scenarios where that occurs, but I see that commonly on other projects, though it is occurring more often here. Probably the time limits have been set rather short on Universe.
ID: 1274 · Rating: 0 · rate: Rate + / Rate - Report as offensive    Reply Quote
Profile Krzysztof Piszczek - wspieram Polski projekt BOINC
Project administrator
Project developer
Project tester
Avatar

Send message
Joined: 4 Feb 15
Posts: 573
Credit: 60,033,800
RAC: 12,825
Message 1275 - Posted: 25 Jul 2016, 14:31:39 UTC - in response to Message 1274.  

I've had 2 of these, both were cancelled by the server, any idea why?

If you look at your Work Units that were cancelled by server, you will probably find that they were successfully completed by two other crunchers. That is what happens with projects that use a quorum, where two users must receive a work unit to validate against each other. There is always a time limit, and if one user does not return the result soon enough, they send it out to a third user (you in this case). Then, if the one user returns it before you can get to it, the server sends out an abort to your machine, so you don't waste time on it.

There may be other scenarios where that occurs, but I see that commonly on other projects, though it is occurring more often here. Probably the time limits have been set rather short on Universe.

Correct.
Also, with new application server always more carefully and sends third WU bit faster then usually.
Krzysztof 'krzyszp' Piszczek

Member of Radioactive@Home project team
Radioactive Android Map
Tsu
ID: 1275 · Rating: 0 · rate: Rate + / Rate - Report as offensive    Reply Quote
mmonnin

Send message
Joined: 2 Jun 16
Posts: 92
Credit: 20,515,067
RAC: 212,334
Message 1276 - Posted: 25 Jul 2016, 18:25:42 UTC - in response to Message 1275.  

A third WU? Try 10!
http://universeathome.pl/universe/workunit.php?wuid=6189406

Duplicates 2 through 9 were sent within 1 hour of each other. How much as 'a bit faster'?
ID: 1276 · Rating: 0 · rate: Rate + / Rate - Report as offensive    Reply Quote
Profile Krzysztof Piszczek - wspieram Polski projekt BOINC
Project administrator
Project developer
Project tester
Avatar

Send message
Joined: 4 Feb 15
Posts: 573
Credit: 60,033,800
RAC: 12,825
Message 1277 - Posted: 25 Jul 2016, 19:11:21 UTC - in response to Message 1276.  

Look at CPU times for extra WU's. All of them doesn't take any CPU time at all.
I'm sure that with more WU's situation with them stabilise. (Anyway, on my hosts this doesn't happened).
Krzysztof 'krzyszp' Piszczek

Member of Radioactive@Home project team
Radioactive Android Map
Tsu
ID: 1277 · Rating: 0 · rate: Rate + / Rate - Report as offensive    Reply Quote
Profile Conan
Avatar

Send message
Joined: 4 Feb 15
Posts: 44
Credit: 2,530,446
RAC: 0
Message 1284 - Posted: 29 Jul 2016, 0:15:22 UTC
Last modified: 29 Jul 2016, 0:17:45 UTC

I am guessing here that due to the reduced run time for Quarkstars against BHSpin (in my case it is over 2,000 seconds less), the credit has now been reduced accordingly from 333.33 to 250.00 per work unit.

Conan
ID: 1284 · Rating: 0 · rate: Rate + / Rate - Report as offensive    Reply Quote
mmonnin

Send message
Joined: 2 Jun 16
Posts: 92
Credit: 20,515,067
RAC: 212,334
Message 1285 - Posted: 29 Jul 2016, 1:47:46 UTC

Seems roughly inline with BHSpin v1 PPD except for the BHSpin tasks with 10 in the name. Those are still way too long.
ID: 1285 · Rating: 0 · rate: Rate + / Rate - Report as offensive    Reply Quote
Profile Sebastian M. Bobrecki
Volunteer tester

Send message
Joined: 4 Feb 15
Posts: 17
Credit: 154,493,357
RAC: 119
Message 1288 - Posted: 2 Aug 2016, 8:12:39 UTC

Will there be another tasks for this application? Or maybe it was just a single shot?
ID: 1288 · Rating: 0 · rate: Rate + / Rate - Report as offensive    Reply Quote
Grzegorz Wiktorowicz
Project developer
Project scientist

Send message
Joined: 25 Feb 15
Posts: 43
Credit: 5,684,705
RAC: 0
Message 1289 - Posted: 3 Aug 2016, 9:07:14 UTC - in response to Message 1288.  

Yes, we plan to develop this project further!

Quark Stars have been proposed to explain observations of very massive neutron stars, but these objects are hardly distinguishable from each other. The population studies are necessary, which will be probably available soon with Square Kilometre Array (SKA). However, a lot of theoretical study have to be done before any information may be dug out from observations. This is the goal of Quark Star application. Nevertheless, we are pioneers in such studies so a lot of tests is yet in front of us, before a large scale computation could be started.
Grzegorz Wiktorowicz
Astronomical Observatory
University of Warsaw
ID: 1289 · Rating: 0 · rate: Rate + / Rate - Report as offensive    Reply Quote
Profile Sebastian M. Bobrecki
Volunteer tester

Send message
Joined: 4 Feb 15
Posts: 17
Credit: 154,493,357
RAC: 119
Message 1290 - Posted: 3 Aug 2016, 11:19:57 UTC - in response to Message 1289.  

Thanks for info Grzegorz. That sounds very interesting.
ID: 1290 · Rating: 0 · rate: Rate + / Rate - Report as offensive    Reply Quote
Post to thread

Message boards : News : New QuarkStars application