Posts by ivan


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1) Message boards : Number crunching : Migration of BOINC within Linux Installations (Message 1722510)
Posted 4 hours ago by Profile ivan
A couple of random thoughts, on posts so far:
o Mint is derived from Ubuntu, so there shouldn't be any problems with BOINC
o I learnt long ago to have (at least) three partition on a Linux machine; /, /home and swap. Then when you change/upgrade the OS everything goes into / and you don't touch /home so all your files are still there. You just need to add or modify your user on the new system to have /home/<user> as the home directory.
2) Message boards : News : Graduate student Lauren Weiss is searching for planets (Message 1722263)
Posted 16 hours ago by Profile ivan
Will we ever be able to send satellites to other systems? If yes, can we get an educated guess on when it would be possible?

The nearest star system is 4 light-years away. Assuming we could send matter at light-speed, we couldn't expect a signal back for 8+ years. In practice you need to accelerate to speed, then decelerate to match velocity at destination. We need hyperdrive/wormholes/whatever before it's ever going to be feasible, normal propulsion systems won't cut it.
3) Message boards : Number crunching : Futher restrictions on when BOINC runs tasks... (Message 1720035)
Posted 6 days ago by Profile ivan
If it's like the Linux version (highly likely :-), just ./boinccmd on its own will give all the options. I've got lots of scripts to do all sorts of things (e.g. when communications were flaky I had a cron job run two or three times an hour to check for finished jobs to upload them) but some of them rely on other awk or python scripts as well. I also need to use the command line on systems where BOINC won't compile the GUI (boincmgr) due to missing or mismatched libraries.
4) Message boards : Number crunching : Cache filling strategy BOINC 7.4.42 vs. 7.6.6 and/or other improvements? (Message 1720030)
Posted 6 days ago by Profile ivan
Thanks again, so:

Never change a running system, don't dare to touch it, don't even think about it!

;)

You are mocking the Geek credo...

If it's working correctly, you must not be pushing it hard enough.

Ronald Regan: If it ain't broke, don't fix it.
USMC Engineers: If we can't fix it, it ain't broke!
5) Message boards : Number crunching : SETI/BOINC Milestones [ v2.0 ] - XXIX (Message 1719943)
Posted 7 days ago by Profile ivan
My work PC just passed 20 M credits.
6) Message boards : Number crunching : Two SETI@home screens (Message 1718248)
Posted 10 days ago by Profile ivan
I have the program set to display the work constantly. It almost seems frozen, with the same May 2 observation and the stats saying 100.0000% complete on the upper left. Only the graph on the bottom changes.
However, when my screensaver kicks in, there is a different observation each time, and the whole screen changes fast, including the upper left stats.
What are these two?

Which "view" are you using. You should almost certainly be using "Advanced View" rather than "Simple View" and you should never use the BOINC screensaver if you have the option -- it just takes CPU cycles away from the crunching.
7) Message boards : Number crunching : Cruncher won't connect to server (Message 1718053)
Posted 11 days ago by Profile ivan
Mac OS X v10.6 Use the following Terminal command to reset the DNS cache: sudo dscacheutil -flushcache

https://support.apple.com/en-us/HT202516
https://developer.apple.com/library/mac/documentation/Darwin/Reference/ManPages/man1/dscacheutil.1.html
8) Message boards : Number crunching : SETI/BOINC Milestones [ v2.0 ] - XXIX (Message 1717280)
Posted 13 days ago by Profile ivan
I wonder why ic-hep aren't in here crowing about their achievements? I'll have to ask next time I'm speaking to them. I could use that horsepower when I get CMS@Home running again!
9) Message boards : Number crunching : Download errors? (Message 1717268)
Posted 13 days ago by Profile ivan
I was getting tons of download errors recently when one of the servers was down. Cleared up when it was brought back into service, but after the network reorganisation at Berkeley I also stopped BOINC and did a DNS cache flush where possible, and restarted.
10) Message boards : Number crunching : Corsair Graphite 600T (Message 1717267)
Posted 13 days ago by Profile ivan
Moved my System to the new cause.
Now it wont start. No beep nothing.
Is the. Case defekt?
No Manual
What is that USB connector for.
System panel switches have funny colours.
Shouldnt matter.
Anyone an idea What to try?

I suppose you've already got http://www.corsair.com/~/media/Corsair/download-files/manuals/49-000070_revAA_600T_QSG.pdf, which was all I could find on their web-site.
11) Message boards : Number crunching : CMS@Home needs about fifty good volunteers... (Message 1717265)
Posted 13 days ago by Profile ivan
I have a new set of jobs ready to submit, and be the basis of my comparison with standard GRID -- but I just can't submit them! BTW, we'll run out of recycled minimum-bias simulation jobs, probably sometime Saturday night, so if your CMS@Home-dev rigs subside into lethargy, feel free to revert to your backup projects.

Don't worry, I am running 6 projects and one or the other is often out of work. But I am running also CPDN tasks, which go on for months.
Tullio

Oh, I'm not particularly worried. Last week was incredibly hectic, with fault reports coming in faster than I could verify them. Luckily for me, Laurence et al. took most of the load. Now I've had confirmation from CRAB developers that the reason I can't submit jobs is that a new version of CRAB server isn't backward compatible with the patches used to enable CMS@Home (Hmm, I was told it used a plugin that the framework allowed for...) so there's nothing I can do until they get the time to come up with new code. I'm almost looking forward to getting back to working on simulations of the 2025 CMS Level-1 Track-Trigger this week. Almost... :-)
12) Message boards : Number crunching : CMS@Home needs about fifty good volunteers... (Message 1716732)
Posted 14 days ago by Profile ivan
Tja, we've run into multiple problems this week. But, that's what testing is about. I'd *hope* to get things working again by the weekend, but there are multiple issues to be addressed -- and as usual, key people are probably on August holidays. (Why can't people take summer holidays at Christmas, like the civilised world does? :-)

Unfortunately, although Laurence seems to have got all the logging and console displays working in time for the weekend, I've run into an as-yet unsolved problem in submitting new jobs -- the CRAB server reckons it can't gsissh into our Condor scheduler. Now, it was working on Tuesday... Have I changed anything since then? Well, yes, but nothing that should affect this AFAIK. If I'm awake enough later today I'll try to submit something from CERN rather than our local server; if it works I've screwed up something local, if it doesn't then someone else has messed up elsewhere. More likely there's some security reason I can't submit from CERN...
I have a new set of jobs ready to submit, and be the basis of my comparison with standard GRID -- but I just can't submit them! BTW, we'll run out of recycled minimum-bias simulation jobs, probably sometime Saturday night, so if your CMS@Home-dev rigs subside into lethargy, feel free to revert to your backup projects.
13) Message boards : Number crunching : CMS@Home needs about fifty good volunteers... (Message 1716151)
Posted 15 days ago by Profile ivan
Tja, we've run into multiple problems this week. But, that's what testing is about. I'd *hope* to get things working again by the weekend, but there are multiple issues to be addressed -- and as usual, key people are probably on August holidays. (Why can't people take summer holidays at Christmas, like the civilised world does? :-)
14) Message boards : Number crunching : CMS@Home needs about fifty good volunteers... (Message 1715315)
Posted 17 days ago by Profile ivan
Just to say here that my "challenge" will be delayed by a day or two. There have been some issues that need resolving, and I also haven't had time to come up with a workflow that's to my liking. So keep an eye out for the kickoff announcement, hopefully later this week.
15) Message boards : Number crunching : CMS@Home needs about fifty good volunteers... (Message 1714703)
Posted 18 days ago by Profile ivan
With VM's RAM increased to 4GB app still uses "low mem mode" (if I interprets that msg right):
* LHAPDF Version 5.9.1 *
* Configured for the following: *
* All PDFs *
* LOW MEMORY option *
* Maximum 1 concurrent set(s) *


But VM itself made use of additional RAM. 2,7G showed as used in top. Mostly for cache. Hope this would reduce disc activity from VM.

Interesting that this memory accounted in Windows task manager performance tab (used ~5GB of RAM total) but not attributed to any process on processes tab. So it's semi-invisible for Windows.

I believe that message is about a configuration option in the LHAPDF library, to limit the amount of memory used to store PDFs in memory (http://lhapdf.hepforge.org/lhapdf5/configure). [PDF = Parton Distribution Function, see https://en.wikipedia.org/wiki/Parton_(particle_physics) for example.]
16) Message boards : Number crunching : CMS@Home needs about fifty good volunteers... (Message 1714397)
Posted 19 days ago by Profile ivan
Question: I exited from top (pressing q) so how to re-run it w/o VM restart? Discovered console on Alt-F6 but don't know root password. Something interesting on Alt-F10 also.

Suspending task just paused VM, restarting BOINC resulted in taking VM's snapshot and then resuming from it. So, I returned into console w/o top again :/.

And now, with second job, job's log file doesn't get updates. So - blind run now. Maybe worth to open VM w/o BOINC and reboot it?

Yeah, I'm not sure about that, except to say "don't press Q!". Also, obviously, I'm not going to give out the password for logon indiscriminately.

Feel free to play around with the VM as you see fit, we're not in production yet and can afford to lose results to experimentation.
17) Message boards : Number crunching : CMS@Home needs about fifty good volunteers... (Message 1713945)
Posted 19 days ago by Profile ivan
I'm out too, my internet connection is too slow..

Good luck

Cheers, mate.
18) Message boards : Number crunching : CMS@Home needs about fifty good volunteers... (Message 1713944)
Posted 19 days ago by Profile ivan
Hi Ivan, I wish you the very very best of luck with this endeavour, but I fear that I am unable to help personally.

Chris, I understand.
19) Message boards : Number crunching : CMS@Home needs about fifty good volunteers... (Message 1713943)
Posted 19 days ago by Profile ivan
    *Broadband at least 10M, always on.


Upload or Download? Or both?
Download, mostly, the VM image is the best part of 1 GB. To be honest I haven't taken particular notice of the size of the returned data.

And tell me where I can find Internet provider who promises 100% always on???

And bad timing for this project, WOW! Event is currently running. So most of users with required specifications are running WOW!....
Ah, yes, that's unfortunate, but I need to press on with this as soon as I can. Let the chips fall where they may, we don't need the most capable players, in fact we need more the average guys.
20) Message boards : Number crunching : CMS@Home needs about fifty good volunteers... (Message 1713872)
Posted 20 days ago by Profile ivan
Does Virtualbox still need the "Oracle VM VirtualBox Extension Pack" (with matching version number) in order to use the remote desktop display?

You're too quick, Richard! Yes, see my redacted post...


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