1) Message boards : Cafe LHC : Whatever happened to LHC@home....apologies and thanks. (Message 22653)
Posted 2 Jan 2011 by lpoorman
Post:
Thanks for the Christmas wishes and especially for keeping us up to date. Also thanks for the prospect of good news in the new year and most of all for your continuing efforts on our behalf!!!
2) Message boards : Number crunching : Two announcements (Message 22031)
Posted 10 Mar 2010 by lpoorman
Post:
[quote]
Agreed, I am not defending or condoning CERN\\\'s treatment of LHC@home but that is sadly how it is. There are people at CERN who do understand and support BOINC but money and hands are tied. We do the best we can with zero dedicated effort or funding. This isn\\\'t always good enough for some of the volunteers here on the board but sadly, as I said, this is how it is. I watch the boards (usually lurking) and I do bring the views expressed on here to meetings and we do our best to fix issues. However the priority is to get the work from the scientists, get it crunched and get it back to them. This has always got to work so other concerns fall by the way side sometimes.

Neasan, did you and Bigmac ever consider going the Linus Torvalds route and initiating a small project that the community itself would develop - at least as an experiment? Whether it is feasible or not and how many volunteers you would get is a very open question.
3) Message boards : LHC@home Science : Where\'s all the work? (Message 21834)
Posted 9 Feb 2010 by lpoorman
Post:
See the post from River under Number crunching!!!


I\\\\\\\'ve been signed up for LHC@home\\\\\\\'s BOINC program for months, and have yet to receive any work for my CPU! I have been running SETI@home and been getting gobs of work. Anybody know why LHC isn\\\\\\\'t farming out work?


Nevermind, I read a little further down the list...

4) Message boards : Cafe LHC : Whatever happened to LHC@home....apologies and thanks. (Message 21831)
Posted 9 Feb 2010 by lpoorman
Post:
Right now it does not seem feasible to
use LHC@home for processing this data. The
disk space, memory, and networking
requirements would overload your computer.


First, how much disk space, how much memory and how fast would the networking requirements on a home PC need be for it to be able to handle the data?

Second, could not the data be broken up into smaller chunks which could be processed on a home PC or would that effort be more than it is worth?






Well, LHC@home has always been used for
beam (stability) studies. So far so good.
The beams have been very stable during
operations so far. When the LHC is running,
and it will start again soon, the four major
experiments withe their giant detector systems
will record the data from the collisions
as the beams intersect. This data handled
by an online computer cluster is transmitted
to the Computer Centre at CERN for recording
on tape (yes still the cheapest way to
archive data) and sent out to the other GRID
systems. This data is then processed by
the GRID centres including CERN, in the
hope of finding the Higgs particle, if it
exists :-) . The point is that the analysis
requires even more data describing the
detector, the detector setup, etc etc
and the programs, databases are large.
Right now it does not seem feasible to
use LHC@home for processing this data. The
disk space, memory, and networking
requirements would overload your computer.
On the other hand since the GRID is/will be
full of this workload there are few resources
available for the accelerator studies.
Here is where LHC@home is outstandingly
useful....and has already carried out a
study of beam beam interaction, a very
interesting and worrying effect, which
could not have been done in any other
way. Hope this helps.

5) Message boards : LHC@home Science : Dreams & Worries in Era of Big Collider (Message 21807)
Posted 26 Jan 2010 by lpoorman
Post:
Thanks very much for the information Tom. I look at these message boards from time to time to keep abreast on activities at Cern. In the New York Times article there was mention of a new book that Lisa Randall is working on. Does anyone know what the name of the book will be or when it is scheduled to be printed? It is not the type of information that is readily available here in Europe.

Thanks
6) Message boards : Number crunching : Are we dead in the water? (Message 13579)
Posted 12 May 2006 by lpoorman
Post:
Hej, hej Chrulle,

Thought you were off to the homeland and then to the States to look for a job. Still in Switzerland? Anyhow, it is good to see you are still around and keeping your eye on the message boards. Any more news on the new projects which you mentioned some months ago?
7) Message boards : LHC@home Science : LHC im iX-Magazin (Message 13321)
Posted 11 Apr 2006 by lpoorman
Post:
Thank you very much Ananas for the "hot tip"! The article titled on the cover of the magazine "Global Grid" is very comprehensive and up to date which indicates that the author was obviously at CERN, had a look around and talked to some of the people there - especially the head of the IT department. The author refers to us the crunchers as a powerful armada and goes on to say that our computer capacity often exceeds that of CERN's own computer center. And what is the computer center using - they are phasing out their Sun workstations? They are using standard PCs with Intels Xeon-processors. 3000 of them which they are increasing to 5000. How's that for a computer farm?
These all connected together in a Linux cluster. Anyone have any idea if they are using a standard Linux distribution or have they cooked up their own? Ben?

Most of the rest of the article is about the LCG, the grid which is being set up to distribute the data from the experiments (i.e. the detectors) to the people all over the world who will analyze it looking for among other things the Higgs-Boson.

Also listed in the article is a list of links for anyone interested in following up any of the topics mentioned.

Can only hope the article gets translated into English and printed in some English magazines.
8) Message boards : Number crunching : Not HAPPY people. (Message 13180)
Posted 29 Mar 2006 by lpoorman
Post:

Ain't that the truth!!! I remember my first DEC mainframe (not midrange). It had the brand spanking new eight bit words, WOW. AND, we had FIVE, yes FIVE 100 kilobyte platters!! It was a powerful monster.

[/quote]
Was that a PDP-11? Did you put the first boot strap in with the switches and the
second one with a paper tape?
9) Message boards : Number crunching : Is the user base/project participants growing a bit too large, for our server? (Message 13173)
Posted 29 Mar 2006 by lpoorman
Post:
Chrulle

It was a real pleasure being a member of the team in which you were forum moderator, project administrator, project developer and last but not least physicist all in one. And then an active contributor to the message boards as well. It meant that when one had a technical question, be it about work units or be it about physics he didn't get the answer "I'll have to send that to the technical people and see what they say" as is the case in other projects. Also I appreciate the freedom you allowed those posting to the message boards. There was no reprimanding people for posting to the "wrong" board and that sort of thing.

I have one suggestion that you might pass along to you Boinc colleagues . That is that Boinc set up a newsletter to which one can subscribe and in which they inform the crunchers of all Boinc projects - existing, new and future. Especially information about projects which are on the drawing board - what the project is about, when it will enter the testing phase, the URL for pre-registeration etc. I am sure others will have more suggestions. Lastly, I think that there are a lot of people out there who would relish the opportunity to help with such a project as setting up and running a newsletter. The whole burden does not have to fall on people such as yourself. Many of the crunchers are very qualified and be very happy to be able to contribute more than just time on their PC's.

Lastly, I think for the US you are going to need a work permit, green card and all that stuff. If any of us can do anything for you, please let us know.
10) Message boards : Cafe LHC : March 27th Forbes magazine (Message 13047)
Posted 16 Mar 2006 by lpoorman
Post:
Molzahn - very interesting reading. Thank you very much for posting it. Even it Forbes magazine was available on the newsstands here in Germany, it is not one of the magazines in which I would expect to find articles about physics projects. So thanks again for bringing it to our attentions.
11) Message boards : Number crunching : Is the user base/project participants growing a bit too large, for our server? (Message 12971)
Posted 9 Mar 2006 by lpoorman
Post:
Hey Chrulle,

Your "little" progress report is very much appreciated!I think it is tremendous that people such as Jukka Klem and yourself take the time to keep us abreast of some of the things that are going on in connection with LHC@Home.

The ATLFast sounds, at least to me, like a very exciting project and I can only hope that the project leaders do decide to farm some of it out to the LHC@Home users.

Lastly, thank you very, very much for being such an active contributor to the bulletin boards and for supplying us with so much valuable information. I wish you all the best in you new endeavors wherever and whatever they may be.
12) Message boards : LHC@home Science : LHC@home Physics Results (Message 12828)
Posted 22 Feb 2006 by lpoorman
Post:
Excellent! Thank you very much for posting this link Jukka. It is very reassuring to get this type of verification that the results of our efforts are actually being utilized - even more gratifying to see some scientific evidence that it is leading to a much more stable beam.

I assume that live tests with the beam have not yet commenced because 1. the magnets are not all yet positioned and aligned and 2. when the beam is on everyone working on detectors, magnets, cabling etc. would have to leave the tunnel. Do you know when the first actual live beam tests are due to start?
13) Message boards : LHC@home Science : CERN doesn't like LHC@Home. (Message 12673)
Posted 7 Feb 2006 by lpoorman
Post:
[River, you wrote

When I was at CERN in the late 70's the LEP was in about the same stage as the LHC is now...

I do not know if this is the correct place to ask this question. If not say so, otherwise I would be very interested in hearing just exactly what type of work you were doing on the Large Electron-Positron Collider. What I mean is that you could have been working on the dectors or you could have been working on the magnets or you could have been using the results to write a thesis. Or even something else entirely. Or maybe I should ask this question in the Cafe?
14) Message boards : Number crunching : Future completion of the LHC (Message 12269)
Posted 22 Jan 2006 by lpoorman
Post:
> "The sysadmins do read the boards, they do not comment that much, ..."

Thank you very much Paul! That is very reassuring to know that at least someone from the CERN side has an ear to the message boards. However that cannot be a dead end. The sysadmins cannot be isolated from the rest of the people on the project. They must at sometime or other talk to some of the other people on the project and they must also know whom to talk to in order to pass along the users concerns or requests even if it only means talking to the sectary of the person responsible. There must also exist meetings where the sysadmins or their supervisor is invited to participate. And there must be a cafeteria where the sysadmins "bump into" other people working on the project. I am optimistic that at least some of our concerns will be passed along - up the line of command.
15) Message boards : Number crunching : Future completion of the LHC (Message 12256)
Posted 22 Jan 2006 by lpoorman
Post:
> While all (or at least most) of us are here because we want to contribute to science and not because of a competition of any sort, ,,,"

Yes, I too belong to that group of people who contribute because of the science and not any competition. And looking through the user profiles it becomes obvious that there are a great number of young people studying physics or similar disciplines whom I assume are primarily involved because of the science being done. Unfortunately we the contributors do not get much feedback concerning the discussions, conclusions, progress, results etc. connected with the LHC project. There must exist such things as minutes of the meeting, progress reports, schedules for further activities etc. These are all things which occur during the running of the project. The actually physics reports do not occur until much, much later. Would it not be possible the project people to provide a link to some of these documents so that we too could have a greater participation in the project?

> Actually, it would be really nice if LHC could find some way of sending the particle tracks for crunching to the BOINC clients. Some of us are on always on connections of reasonable bandwidth, and would not mind large downloads.

Brilliant idea! Super! There are an almost infinite number of possibilities here. It does not necessarily have to be number crunching. The Stardust project is for example going to have us looking at short film sequences looking for dust particles.
16) Questions and Answers : Unix/Linux : start_client hangs (Message 12128)
Posted 17 Jan 2006 by lpoorman
Post:
First, thank you very much for your help and suggestions Michael. You were absolutely correct in suggesting that I upgrade to version 5.2.
After installing version 5.2 and running run_client I got the following messages:

2006-01-17 10:25:24 [---] This computer is not attached to any projects.
2006-01-17 10:25:24 [---] There are several ways to attach to a project:
2006-01-17 10:25:24 [---] 1) Run the BOINC Manager and click Projects.
2006-01-17 10:25:24 [---] 2) (Unix/Mac) Use boinc_cmd --project_attach
2006-01-17 10:25:24 [---] 3) (Unix/Mac) Run this program with the -attach_project command-line option.

So I ran the manager and it was intelligent enough to also noticed that I had no work and so it immediately displayed some menues where it requested my password, the URL (which you supplied) etc. After that it just downloaded the work units and started working. So again thank you very much for your support!

My only complaint is that there is not a "cookbook" set of instructions for setting up, installing and running LHC@home on Linux.

cheers,

Larry

17) Questions and Answers : Unix/Linux : start_client hangs (Message 12127)
Posted 17 Jan 2006 by lpoorman
Post:
First, you should upgrade to BOINC 5.2.*. Second, I suspect
you did not attach to LHC yet.

Do as follows:

1) edit gui_rpc.cfg and replace the string with something you can remember.
2) add the command-line switch "-allow_gui_rpc" to run_client
("run_client -h" shows all switches)
3) restart BOINC
4) start the GUI (startup script is in the same directory)
5) if asked for a password, use the one from gui_rpc.cfg
6) Use project->attach to attach to LHC

The URL is "http://lhcathome.cern.ch/", password is the one you must set
here via the "Your Account" page. Make sure you select "Existing Account" in
the process.

HTH

Michael

18) Questions and Answers : Unix/Linux : start_client hangs (Message 12084)
Posted 16 Jan 2006 by lpoorman
Post:
I have not downloaded any work before. As of today January 16, 2006 there is again work available. When I start run_client under Linux (SuSE 9.2) I get the following messages:
2006-01-16 12:59:27 [---] Starting BOINC client version 4.43 for i686-pc-linux-gnu
2006-01-16 12:59:27 [---] Data directory: /home/prof/LHC/BOINC
2006-01-16 12:59:27 [---] No general preferences found - using BOINC defaults
2006-01-16 12:59:27 [---] Remote control not allowed; using loopback address
2006-01-16 12:59:27 [---] Insufficient work; requesting more

and then it does nothing (at least for the next hour or more).

What can I do to find out why the program hangs?

My internet connection is DSL.
Boinc version 4.4.3.

Thanks,

Larry



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