21) Message boards : News : Server/Executable problems (Message 24193)
Posted 9 Jul 2012 by Keith T.
Post:
Thanks Pete, Upload has completed on that file, but it is now validation inconclusive along with 2 others http://lhcathomeclassic.cern.ch/sixtrack/workunit.php?wuid=1765377

Should SixTrack v443.07 validate against SixTrack v444.01 ?
22) Message boards : News : Server/Executable problems (Message 24190)
Posted 9 Jul 2012 by Keith T.
Post:
We have corrected the filesystem problem and have increased it in size.
Please report back if problems continue


Still getting Upload problems after this message. My TZ is UTC+1

09/07/2012 17:39:00 LHC@home 1.0 Started upload of w1jul_niebb0d__5__s__64.28_59.31__10.2_10.4__6__22_1_sixvf_boinc8121_0_0

09/07/2012 17:39:03 LHC@home 1.0 [error] Error reported by file upload server: can't open file /data/boinc/project/sixtrack/upload/7d/w1jul_niebb0d__5__s__64.28_59.31__10.2_10.4__6__22_1_sixvf_boinc8121_0_0: Permission denied

09/07/2012 17:39:03 LHC@home 1.0 Temporarily failed upload of w1jul_niebb0d__5__s__64.28_59.31__10.2_10.4__6__22_1_sixvf_boinc8121_0_0: transient upload error

09/07/2012 17:39:03 LHC@home 1.0 Backing off 2 hr 44 min 19 sec on upload of w1jul_niebb0d__5__s__64.28_59.31__10.2_10.4__6__22_1_sixvf_boinc8121_0_0
23) Message boards : Number crunching : Task Quota per host or per CPU core. (Message 23976)
Posted 12 Jun 2012 by Keith T.
Post:
At the moment there is a 3 task quota per core (atleast last week it worked like that).

And ofcourse on HT cards it will be double that, since boinc sees every core as two.


I don't think it is currently enforced:
http://lhcathomeclassic.cern.ch/sixtrack/show_host_detail.php?hostid=9948265
Number of processors: 2
Tasks in progress: 20

That host is highly unlikely to complete all those before deadline, as his run times for the work completed so far are between 25,002.33 secs and 29,397.84 secs.
It is slower than my Intel Atom netbook on the same tasks.
24) Message boards : Number crunching : Task Quota per host or per CPU core. (Message 23974)
Posted 12 Jun 2012 by Keith T.
Post:
Does this project still enforce any quota of tasks?

One of my wingmen http://lhcathomeclassic.cern.ch/sixtrack/results.php?hostid=9948265 has so far only managed to complete 4 of the 24 tasks it received on 6 June. They all have a deadline of 13 June, 7:43 or 7:44 UTC.

I thought that there used to be a quota, but it may have been removed or raised at some time during a glut of tasks, but it would probably be a good idea to re-introduce at the moment as many hosts don't get any tasks some months while others like this Anonymous one struggle to complete the work they do get.

[EDIT]
I found this old thread http://lhcathomeclassic.cern.ch/sixtrack/forum_thread.php?id=3332 after creating this new one, sorry.

I suggest a quota of "In progress" tasks of 2 per core would probably be a good place to start, when a host returns work, either validated or pending it could then get more work if available. This should enable a fairer distribution of the limited work available.
[/EDIT]
25) Message boards : LHC@home Science : The Big Bang: What Happened Next (Message 21921)
Posted 3 Mar 2010 by Keith T.
Post:
http://www.bbc.co.uk/programmes/b00qvpb9

Tonight 9pm UTC. BBC Radio 4 FM and 198kHz LW. I think it is available online for those outside UK and Western Europe that can receive 198kHz LW.

Keith
26) Message boards : Number crunching : Changes to Quorum and Replication ! (Message 21245)
Posted 24 Feb 2009 by Keith T.
Post:
I have just noticed that my latest tasks are showing quorum and replication of 2 and 2.

http://lhcathome.cern.ch/lhcathome/workunit.php?wuid=3479835

However there also seems to be a problem with some of these new tasks, one of mine crunched sucsessfully, the other one had:
Exit status -177 (0xffffff4f)
Maximum disk usage exceeded

Still nice to see that new work is in progress.

Keith
27) Message boards : Number crunching : New Work Available Jan 2009 (Message 20949)
Posted 11 Jan 2009 by Keith T.
Post:
11 Jan 2009 14:41:30 UTC

Results ready to send 0

The biggest WU batch in recent history has just run out.

http://bluenorthernsoftware.com/scarecrow/lhcstats/lstat.html shows that this batch lasted over 3 days.

I hope that we lots more similar batches in 2009.

Keith.
28) Message boards : LHC@home Science : Collider Repairs (Message 20850)
Posted 6 Dec 2008 by Keith T.
Post:
Article here http://www.universetoday.com/2008/12/05/report-early-warning-system-needed-for-lhc/ with pictures.
29) Message boards : Number crunching : Why BOINC 6.X has issues with LHC@home and other things (Message 20782)
Posted 18 Nov 2008 by Keith T.
Post:
The bill to repair the LHC is likely to be higher than originally expected.

http://news.google.co.uk/news?hl=en&ned=uk&nolr=1&q=lhc+hadron&btnG=Search
30) Message boards : Number crunching : Segmentation violation (Message 20581)
Posted 1 Oct 2008 by Keith T.
Post:
I have seen this as well. I didn\'t really suspect LHC but now that you mention it, I think it has only happened while LHC has had work... but I won\'t swear to that. I\'ve seen it on gentoo with BOINC 5.10. BOINC is installed through portage so it was compiled on the box it is running on. I even tried reinstalling (which means recompiling) in case some underlying library changed but that didn\'t help. But it is pretty infrequent which of course means hard to troubleshoot...

It happened twice on me and always on LHC and never on the other 5 projects I am running. But I am sure it happens when the server wants to delete a redundant result.
Tullio


I don\'t know Linux well, but it seems to me that this could be a BOINC issue which only occurs under certain circumstances rather than a LHC@home issue.

Has this occured on any other project which cancels redundant results ?

I know that SETI Beta runs a IR=3 Q=2 policy on MultiBeam (not AstroPulse) WU\'s, so it may be worth while attaching to that project as a test, to see if this occurs on other BOINC projects.

It may also be useful to post about this on BOINC message boards, or raise a TRAC Ticket.

Keith.
31) Message boards : LHC@home Science : BBC Radio coverage of CERN and the LHC (Message 19971)
Posted 1 Sep 2008 by Keith T.
Post:
Thread title changed to:

BBC Radio coverage of CERN and the LHC
32) Message boards : LHC@home Science : BBC Radio coverage of CERN and the LHC (Message 19970)
Posted 1 Sep 2008 by Keith T.
Post:
Keep it down but BBC Radio 4 is planning to broadcast for an entire day from CERN later in the year. This will be the first time they have ever done that and EVERY programme will be CERN based (even womens hour)


It has been announced.

http://www.bbc.co.uk/radio4/bigbang/programmes.shtml

I suspect that a lot of it will be available online.

Keith.
33) Message boards : LHC@home Science : BBC Radio coverage of CERN and the LHC (Message 19590)
Posted 1 May 2008 by Keith T.
Post:
Here is the direct link to the Real Player stream http://www.bbc.co.uk/radio/aod/shows/rpms/fivelive/drive_wed.ram. This should be available until shortly after next wenesdays show (About 18:00 UTC on 7th May.)

There were 2 sections of around 9 minutes each during a 3 hour show, discussing the LHC and CERN. The stream does allow you to move foreward and backward.

First LHC report: 43:30 - 52:15
Second LHC report: 1:34:30 - 1:43:45

Hope this makes it easier for people to listen to the LHC reports without having to listen to the whole show.

Keith
34) Message boards : LHC@home Science : BBC Radio coverage of CERN and the LHC (Message 19588)
Posted 1 May 2008 by Keith T.
Post:
The 5 Live show was trailed as if the whole show would be from CERN, but it was a bit disappointing.

There was about 15 minutes of recorded interviews during a 3 hour program. The first one was at about 45 mins into the show, the second about an hour later. I will try to get the exact times and post them here if the stream allows this.

Keith
35) Message boards : LHC@home Science : BBC Radio coverage of CERN and the LHC (Message 19580)
Posted 30 Apr 2008 by Keith T.
Post:
This will mainly interest radio listeners in the UK, but the program is webcast and also available online for 1 week after the broadcast.

http://www.bbc.co.uk/fivelive/programmes/drive.shtml

It starts at 16:00 local time (15:00 UTC) today.

Keith.
36) Message boards : Number crunching : Please note: this project rarely has work (Message 19313)
Posted 28 Mar 2008 by Keith T.
Post:
This project tickles my fancy but a while back I was getting a message that I didn't get any work but there was work for other platforms. I inquired and it was explained to me that this project hadn't been developed for the OSX (mac) platform yet.

Is there a time line for when it may be available or should I not worry about hanging around?

thanks,

Stev


See this thread http://lhcathome.cern.ch/lhcathome/forum_thread.php?id=2592.

It looks like the new Garfield app will run on Mac's but SixTrack is unlikely.
37) Message boards : Number crunching : granting less credit than claimed? (Message 19044)
Posted 21 Feb 2008 by Keith T.
Post:
LHC@home uses a quorum of 3, although 5 results are sent out for each WU.

When 3 valid results have been returned, the credit that is granted is the middle claim. 4th and 5th results will also get that amount of credit if valid and returned before the deadline.
38) Message boards : Number crunching : To completion times for new tasks (Message 19018)
Posted 13 Feb 2008 by Keith T.
Post:
The old P233 MMX completed the task in time http://lhcathome.cern.ch/lhcathome/workunit.php?wuid=2134134

CPU time = 519688.219 seconds = 144.35783861111111111111111111111 hours = 6.0149099421296296296296296296296 days

Interesting to note that it claimed ~ 1 credit/hour

Result was Valid

Received 13 Feb 2008 15:50:08 UTC
Deadline 14 Feb 2008 6:47:52 UTC

I just tried to find the mimimum reccomended CPU spec for LHC on this website, but I can't find it. I know that most BOINC projects do list this.

Keith
39) Message boards : Number crunching : To completion times for new tasks (Message 18960)
Posted 7 Feb 2008 by Keith T.
Post:
Just noticed in BoincView that my old P233 MMX box has a new LHC task highlighted in light yellow instead of the usual green.

Then I noticed that my Athlon's latest LHC tasks have an estimated completion time of 8.5 hours instead of the usual 55 minutes.

It looks like we have some new longer tasks to crunch, I hope the old Pentium MMX makes it OK as it currently estimates completing about 4 hours past the deadline!
40) Message boards : Number crunching : How to contact the Admin of LHC (Message 18664)
Posted 4 Dec 2007 by Keith T.
Post:
Couple of days ago I tried to contact the admin of this project (you can see it in these posts: http://lhcathome.cern.ch/lhcathome/forum_thread.php?id=2633, http://lhcathome.cern.ch/lhcathome/forum_thread.php?id=2504&nowrap=true#18632), because of a problem with the team�s founder.

Due to I can�t find any other way to do it and I haven�t received any answer in all this time (since I posted), does anybody know how or where I can contact the admin or responsable of this project to find a solution to this problem?


I have made your URL's clickable using [ url ] [ /url ] tags.

Neasan was fairly active here until recently. I don't know why he has stopped posting, but some of the "trolls" may have had something to do with it.

After much searching, I found this page http://www.ph.qmul.ac.uk/person.php?initials=N&surname=O%Neill which I think may be helpful.

[EDIT]
I also found these links which may be helpful too.

http://hepwww.ph.qmul.ac.uk/GridPP.html
http://www.ph.qmul.ac.uk/person.php?initials=R.A&surname=Owen
http://www.ph.qmul.ac.uk/person.php?initials=A.J&surname=Martin


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