1) Message boards : Cafe LHC : The LHC is in the c't magazine. (Message 27587)
Posted 6 Sep 2015 by Profile Grubix
Post:
In the c't edition 20/2015, the "joke page" has the LHC as topic. :-)

Link: c't Schlagseite aus 20/2015



Bye, Grubix.
2) Message boards : Number crunching : the 265 tasks in progress (Message 27578)
Posted 30 Jul 2015 by Profile Grubix
Post:
I suspect it involves tasks such as from one of my computers: 9975879
If there is a little bit time at the LHC, those old tasks could be cleared from the database. :-)

Bye, Grubix.
3) Message boards : Number crunching : Host messing up tons of results (Message 27386)
Posted 16 Apr 2015 by Profile Grubix
Post:
Hi Costa, thanks for the hint. I have also seen it last night and I was very surprised. Yesterday I could not do anything, because the computer is not at my home. This morning I have turned the computer off for a few minutes. The error has remained.

The invalid tasks have almost not a "pni" nor a "sse". The tasks with "pni" or "sse" are valid.

Eric, if the host is interesting for your diagnostics, feel free to give me appropriate instructions. But I have only Weekdays access to the host.

Bye, Grubix.
4) Message boards : Number crunching : Too many total results (Message 27382)
Posted 15 Apr 2015 by Profile Grubix
Post:
Hello Stick, please read here:

Available work?

New bizarre Work Units

Host messing up tons of results

Bye, Grubix.
5) Message boards : Number crunching : Available work? (Message 27277)
Posted 4 Apr 2015 by Profile Grubix
Post:
... having a total of 3 means that if 1 fails, it will not send out new and noone will get credit?

I think you mean about this: 30565542

I am one of the two computers with 17000 seconds. The faulty computer 10353061 nearly broken all tasks. This computer has a "EXIT_TIME_LIMIT_EXCEEDED" error after exactly 252.06 or 2520.60 seconds on all tasks. Unusual.

Bye, Grubix.


PS: I'm not so interested in credits, but in science. :-)
6) Message boards : Number crunching : Available work? (Message 27259)
Posted 2 Apr 2015 by Profile Grubix
Post:
There are less than 30k tasks at the moment. That is only enough for a few hours.

You can use a resource share of 0 for a backup project. This project will only download work when the primary project (LHC) ran out of work.

You can use BAM! to remotely control your computer.

Bye, Grubix.
7) Message boards : Number crunching : Host messing up tons of results (Message 27256)
Posted 2 Apr 2015 by Profile Grubix
Post:
Hello Eric, thank you very much for the detailed explanation.


ะกoincidence. 43k CPU sec vs 2.1 and 1.0 CPU sec.

A great example I think. The "dream team" ;-) Dmitry and aqvario working on a task with a regular wingman. The worst case for a task. In the first example, the wingman is even a computer from the LHC itself. :-)

Bye, Grubix.
8) Message boards : Number crunching : Host messing up tons of results (Message 27247)
Posted 31 Mar 2015 by Profile Grubix
Post:
Ah well; I have run this case at CERN. The results are genuine:

Thanks for your reply. I have checked your long host list and found a more interesting example on one of my computers. I have only one invalid WU: 29657154

My computer (i7-3930K/HT) was invalid after 22069 seconds. A Phenom 1090T was valid after 17366 seconds with Dmitry while he needs 0.22 seconds. Stunning.


I am also going to appeal for more volunteers to sign up for testing.

Do you mean the checkmark in the preferences next to "Run test applications?" (most of my hosts are ready) or a other project like vLHC?

Bye, Grubix.
9) Message boards : Number crunching : Host messing up tons of results (Message 27226)
Posted 26 Mar 2015 by Profile Grubix
Post:
I think the valid tasks are very unusual, here is an example: WU: 29893891

The same computer (i7-2600) needs 371 CPU-seconds, while Dmitry needs only 0.34 CPU-second.

I can't believe this, Grubix.
10) Message boards : News : Disk Limit exceeded w-b3 (Message 26840)
Posted 4 Oct 2014 by Profile Grubix
Post:
...
Apologies for the wasted CPU.


No problem, that's science. Where there are people at work, errors may occur. :-)

Bye, Grubix.
11) Message boards : Number crunching : Upload Errors (Message 26569)
Posted 27 May 2014 by Profile Grubix
Post:
I have a lot of download errors:

Di 27 Mai 2014 14:10:41 CEST | LHC@home 1.0 | Scheduler request completed: got 1 new tasks
Di 27 Mai 2014 14:10:43 CEST | LHC@home 1.0 | [http] HTTP_OP::init_get(): http://lhcathomeclassic.cern.ch/sixtrack/download/2db/sd_LHC6.525_300_250_1.8_6D_blev__1__s__64.31_59.32__2_4__6__55_1_sixvf_boinc28.zip
Di 27 Mai 2014 14:10:43 CEST | LHC@home 1.0 | Started download of sd_LHC6.525_300_250_1.8_6D_blev__1__s__64.31_59.32__2_4__6__55_1_sixvf_boinc28.zip
Di 27 Mai 2014 14:10:43 CEST | LHC@home 1.0 | [file_xfer] URL: http://lhcathomeclassic.cern.ch/sixtrack/download/2db/sd_LHC6.525_300_250_1.8_6D_blev__1__s__64.31_59.32__2_4__6__55_1_sixvf_boinc28.zip
Di 27 Mai 2014 14:10:43 CEST | LHC@home 1.0 | [http] [ID#9] Info:  About to connect() to lhcathomeclassic.cern.ch port 80 (#0)
Di 27 Mai 2014 14:10:43 CEST | LHC@home 1.0 | [http] [ID#9] Info:    Trying 128.142.138.22...
Di 27 Mai 2014 14:10:44 CEST | LHC@home 1.0 | [http] [ID#9] Info:  Connected to lhcathomeclassic.cern.ch (128.142.138.22) port 80 (#0)
Di 27 Mai 2014 14:10:44 CEST | LHC@home 1.0 | [http] [ID#9] Sent header to server: GET /sixtrack/download/2db/sd_LHC6.525_300_250_1.8_6D_blev__1__s__64.31_59.32__2_4__6__55_1_sixvf_boinc28.zip HTTP/1.1
Di 27 Mai 2014 14:10:44 CEST | LHC@home 1.0 | [http] [ID#9] Sent header to server: User-Agent: BOINC client (i686-pc-linux-gnu 7.0.27)
Di 27 Mai 2014 14:10:44 CEST | LHC@home 1.0 | [http] [ID#9] Sent header to server: Host: lhcathomeclassic.cern.ch
Di 27 Mai 2014 14:10:44 CEST | LHC@home 1.0 | [http] [ID#9] Sent header to server: Accept: */*
Di 27 Mai 2014 14:10:44 CEST | LHC@home 1.0 | [http] [ID#9] Sent header to server: Accept-Encoding: deflate, gzip
Di 27 Mai 2014 14:10:44 CEST | LHC@home 1.0 | [http] [ID#9] Sent header to server: Content-Type: application/x-www-form-urlencoded
Di 27 Mai 2014 14:10:44 CEST | LHC@home 1.0 | [http] [ID#9] Sent header to server:
Di 27 Mai 2014 14:10:44 CEST | LHC@home 1.0 | [http] [ID#9] Received header from server: HTTP/1.1 404 Not Found
Di 27 Mai 2014 14:10:44 CEST | LHC@home 1.0 | [http] [ID#9] Received header from server: Date: Tue, 27 May 2014 12:10:44 GMT
Di 27 Mai 2014 14:10:44 CEST | LHC@home 1.0 | [http] [ID#9] Received header from server: Server: Apache
Di 27 Mai 2014 14:10:44 CEST | LHC@home 1.0 | [http] [ID#9] Received header from server: Vary: accept-language,accept-charset
Di 27 Mai 2014 14:10:44 CEST | LHC@home 1.0 | [http] [ID#9] Received header from server: Accept-Ranges: bytes
Di 27 Mai 2014 14:10:44 CEST | LHC@home 1.0 | [http] [ID#9] Received header from server: Connection: close
Di 27 Mai 2014 14:10:44 CEST | LHC@home 1.0 | [http] [ID#9] Received header from server: Transfer-Encoding: chunked
Di 27 Mai 2014 14:10:44 CEST | LHC@home 1.0 | [http] [ID#9] Received header from server: Content-Type: text/html; charset=iso-8859-1
Di 27 Mai 2014 14:10:44 CEST | LHC@home 1.0 | [http] [ID#9] Received header from server: Content-Language: en
Di 27 Mai 2014 14:10:44 CEST | LHC@home 1.0 | [http] [ID#9] Received header from server:
Di 27 Mai 2014 14:10:44 CEST |  | [http_xfer] [ID#9] HTTP: wrote 305 bytes
Di 27 Mai 2014 14:10:44 CEST |  | [http_xfer] [ID#9] HTTP: wrote 57 bytes
Di 27 Mai 2014 14:10:44 CEST |  | [http_xfer] [ID#9] HTTP: wrote 87 bytes
Di 27 Mai 2014 14:10:44 CEST |  | [http_xfer] [ID#9] HTTP: wrote 2 bytes
Di 27 Mai 2014 14:10:44 CEST |  | [http_xfer] [ID#9] HTTP: wrote 206 bytes
Di 27 Mai 2014 14:10:44 CEST |  | [http_xfer] [ID#9] HTTP: wrote 1 bytes
Di 27 Mai 2014 14:10:44 CEST | LHC@home 1.0 | [http] [ID#9] Info:  Closing connection #0
Di 27 Mai 2014 14:10:44 CEST | LHC@home 1.0 | [file_xfer] http op done; retval -224 (permanent HTTP error)
Di 27 Mai 2014 14:10:44 CEST | LHC@home 1.0 | [file_xfer] file transfer status -224 (permanent HTTP error)
Di 27 Mai 2014 14:10:44 CEST | LHC@home 1.0 | Giving up on download of sd_LHC6.525_300_250_1.8_6D_blev__1__s__64.31_59.32__2_4__6__55_1_sixvf_boinc28.zip: permanent HTTP error


The line with "HTTP/1.1 404 Not Found" is probably the most important.

Bye, Grubix.
12) Message boards : Number crunching : Long WU's (Message 24820)
Posted 12 Sep 2012 by Profile Grubix
Post:
I'm sorry, a 4-day deadline for estimated 100 hours of runtime is too short for my computer. I aborted the task 2813528.

Bye, Grubix.
13) Message boards : News : Very long jobs (Message 24717)
Posted 25 Aug 2012 by Profile Grubix
Post:
Here's my experience on the topic very long WUs, maybe that's a suggestion for LHC@Home: There are users who are looking forward to a long WUs because they have new and very fast hardware. On my i7-3930K I'd love to calculate a few of the long WUs. In some projects, there is even such a thing as competition, who has the longest.

Then there are users with very slow hardware. I have logged out my Athlon 1800 from LHC, because he can not do the long WUs in the deadline. These users would be happy to get short WUs.

Like the other projects have solved? In the Preferences there are three optional settings:

Run short tasks: yes / no
Run long tasks: yes / no
If no work for selected applications is available, accept work from other applications: yes / no

With these options, you can then decide for yourself what you want. For the project it has several advantages:

- Users don't complain about the long WUs.
- Even older hardware can be running, the project can use more computers.
- Mainly users with faster hardware will select long WUs. Therefore you get the long WUs back faster and not have to wait maybe 30 days on a P4.

Some projects also have the option "Run beta tasks: yes / no". These tasks you get only when you have turned on the option (even though "If no work for selected applications is available ..." is set to yes). Here, the project can sometimes try something more unusual things. *lol*

The default settings are often:

Run short tasks: yes
Run long tasks: no
Run beta tasks: no
If no work for selected applications is available, accept work from other applications: yes

How this is done at the server, I do not know. But maybe e.g. GPUGRID can help.

Just an idea from me, Grubix.
14) Message boards : News : Server/Executable problems (Message 24148)
Posted 8 Jul 2012 by Profile Grubix
Post:
For me it is the same case.

When I look in the download folder (eg http://lhcathomeclassic.cern.ch/sixtrack/download/fa/), all files from 6:00 clock are 0 byte.

Bye, Grubix.
15) Message boards : Number crunching : Delete old hosts? (Message 22058)
Posted 13 Mar 2010 by Profile Grubix
Post:

Thank you very much.

Not all, but most of the old WUs are cleared. Now I can clean up my host list and delete computers that no longer exists.

Thanks, Grubix.
16) Message boards : Number crunching : Delete old hosts? (Message 21786)
Posted 8 Jan 2010 by Profile Grubix
Post:
I hope I do not push too much and I am too impatient. But after 200 days without any reaction I would like to ask how the state of things?

Since there was no answer, I am going to assume that none of the scientists is still interested at the WU list.

Will it now be possible to delete old computers from the host list?

I want to tidy up my stats. For every project that is possible, just not at LHC@Home. This casts a bad light on the project.

Bye, Grubix.
17) Message boards : Number crunching : Delete old hosts? (Message 21408)
Posted 21 Jun 2009 by Profile Grubix
Post:
Hello Christoph, thanks for your reply.

...
I don't remember where, but I once read, that the scientist request to not delet the units...


Are there any scientists here in the forum who can confirm this?

What are two years old WUs still interesting? With the calculated data, the listing of the old WUs still have nothing to do. I think so...

Bye, Grubix.
18) Message boards : Number crunching : Delete old hosts? (Message 21357)
Posted 20 Apr 2009 by Profile Grubix
Post:
Thanks for the reply and the explanation.

I had already searched the forum but found nothing suitable from a admin or project manager. I'm sorry that I warmed up the old theme.

I hope a admin can solve the problem, because users like me would like to have a clean host list. I donate my computer power and the operators take care of problems. In this way both sides are satisfied.

In addition to the science, BOINC users should also have fun. :-)

I hope my thoughts come across, my english is not so good. :-(


Have a nice day, Grubix
19) Message boards : Number crunching : Delete old hosts? (Message 21347)
Posted 15 Apr 2009 by Profile Grubix
Post:
Hello LHC-Team.

In other projects, it is possible to delete old hosts which no longer exists. If the host (e.g. since one month) delivered no WU, there is at the host-page the link --delete this host--.

At LHC, there is no link. There is a link --Merge this computer--, but this do not help me. What must I do to delete old hosts?

Thanks for your help, Grubix.
20) Message boards : Number crunching : Exceeding maxium disk space. (Message 21250)
Posted 24 Feb 2009 by Profile Grubix
Post:
I have the same problem:

--------------------------------
Di 24 Feb 2009 18:59:55 CET||Preferences limit memory usage when active to 1414.21MB
Di 24 Feb 2009 18:59:55 CET||Preferences limit memory usage when idle to 1590.98MB
Di 24 Feb 2009 18:59:55 CET||Preferences limit disk usage to 10.00GB
Di 24 Feb 2009 19:00:17 CET|lhcathome|Aborting task w1_lhc_t1__54__s__64.31_59.32__16_17__5__75_1_sixvf_boinc4482_1: exceeded disk limit: 36.97MB > 28.61MB
Di 24 Feb 2009 19:01:18 CET|lhcathome|Computation for task w1_lhc_t1__54__s__64.31_59.32__16_17__5__75_1_sixvf_boinc4482_1 finished
Di 24 Feb 2009 19:01:20 CET|lhcathome|Started upload of w1_lhc_t1__54__s__64.31_59.32__16_17__5__75_1_sixvf_boinc4482_1_0
Di 24 Feb 2009 19:01:21 CET|lhcathome|Finished upload of w1_lhc_t1__54__s__64.31_59.32__16_17__5__75_1_sixvf_boinc4482_1_0
Di 24 Feb 2009 19:05:17 CET|lhcathome|Aborting task w1_lhc_t1__54__s__64.31_59.32__17_18__5__15_1_sixvf_boinc4483_0: exceeded disk limit: 39.64MB > 28.61MB
Di 24 Feb 2009 19:06:17 CET|lhcathome|Computation for task w1_lhc_t1__54__s__64.31_59.32__17_18__5__15_1_sixvf_boinc4483_0 finished
Di 24 Feb 2009 19:06:20 CET|lhcathome|Started upload of w1_lhc_t1__54__s__64.31_59.32__17_18__5__15_1_sixvf_boinc4483_0_0
Di 24 Feb 2009 19:06:23 CET|lhcathome|Finished upload of w1_lhc_t1__54__s__64.31_59.32__17_18__5__15_1_sixvf_boinc4483_0_0
Di 24 Feb 2009 19:11:34 CET|lhcathome|Sending scheduler request: To report completed tasks.  Requesting 128002 seconds of work, reporting 2 completed tasks
--------------------------------


The computer runs Ubuntu 8.10, has 2GB RAM an the BOINC-Client can use 10GB disk space.

Is this a misconfiguration of the client or the server? The 28.61MB do not seem a value of my computer.

Have a nice day, Grubix.



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