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Posts by Friedrich S.

Posts by Friedrich S.

21) Questions and Answers : Getting started : Location School, Preferences Home? (Message 9369)
Posted 15 Feb 2005 by Profile Friedrich S.
Post:
Hello,

I can't convince my computer that it is located at "School". It insists on using the preferences for "Home".

I went to my account under CPDN, then to My Computers, then to that specific computer and it says that location is "School". But whenever I update the project, the BOINC client says "General prefs: using separate prefs for home". Which of course are the wrong preferences for this specific machine...

Any ideas?
Thanks!

Friedrich
22) Questions and Answers : Getting started : Merging 2 Cross Project IDs? (Message 9368)
Posted 15 Feb 2005 by Profile Friedrich S.
Post:
> Friederich: Did you het this solved?
> I have exactly the same issue. How long
> would it take for synch to take place? Resourcewise CPCN is on 100, SETI on
> 10, EINSTEIN on 15.

I think the preferences are the same, which probably means that the accounts are linked now. I believe that was not the case yesterday, so it took 2 days, maybe because two of the computers are not running continously.

I just changed one setting, so I will see if that propagates in the next days...

Friedrich




23) Questions and Answers : Getting started : Merging 2 Cross Project IDs? (Message 9270)
Posted 13 Feb 2005 by Profile Friedrich S.
Post:
> That is correct without a path from server A to client to server B they will
> never sync. My advice for your situation is to set Seti to a low resource
> share and attach it to one of the CPDN computers. That will allow the CPID to
> sync up without taking too much away from your CPDN crunching.

Thanks!
I tried that and now wait to see what happens...

Friedrich
24) Questions and Answers : Getting started : Merging 2 Cross Project IDs? (Message 9243)
Posted 13 Feb 2005 by Profile Friedrich S.
Post:
> Assuming that you have at least one computer attached to all the projects the
> CPID will eventually sync up. One note: capitalization matters, all email
> addresses should be in lowercase.

Thanks for your answer.
Currently I have no two BOINC projects on the same computer. I have two running CPDN and one running Seti.
Based on what you are saying I understand that the two CPID will never synchronize because of this separation?

Friedrich



25) Questions and Answers : Getting started : Merging 2 Cross Project IDs? (Message 9190)
Posted 12 Feb 2005 by Profile Friedrich S.
Post:
Hello,

I am not sure how I did it, but I ended up with two Cross Project IDs (CPI). One under Seti and one under BOINC. Should they not be the same?
Both have the same e-mail address, but the preferences do not seem to propagate from Seti to CPDN or Vice versa, so I assume that they are not linked...

How do I migrate my Seti from one to the other CPI?
Is that possible or do I have to detach and then attach with the other CPI?

Thanks!

Friedrich
26) Questions and Answers : Windows : Disk Space (Message 9136)
Posted 11 Feb 2005 by Profile Friedrich S.
Post:
[network problems caused an accidental repost that I deleted - F.]
27) Questions and Answers : Windows : Disk Space (Message 9134)
Posted 11 Feb 2005 by Profile Friedrich S.
Post:
> The FAQ
> contains some information on how much space each model needs. It needs about
> 600Mb for each full model run and about 330Mb of information will be left on
> your computer once a model run is finished and the partial information
> uploaded.

Every model will leave 330 MB on my hard drive? The FAQ does not mention that AFAIK.
Is that information needed later of can I safely discard it?
(I have enough space for my two CPDN WUs but not enough to keep all the results.)

Friedrich

28) Questions and Answers : Windows : exit code -5 (0xfffffffb) (Message 9078)
Posted 10 Feb 2005 by Profile Friedrich S.
Post:
Hello Les,

> Also, -5 is a "catch all" error message, so it isn't necessarily a file
> write.
> Sometimes it's caused by a negative pressure in one of the cells.

But is that not a big difference? A model that failed because of a hardware glitch or a file error could have been important & valid whereas a negative pressure certainly shows the model is flawed.
Do they check that and run models again if they failed because of hardware glitches etc.?

> There are several threads about success rates on the phpBB, (which is down),
> and one of the admins said the ratio
> is about 1 in 7 successful, so don't get too discouraged.

Well, I hope the scietists and their programmers now what they are doing. If they consider that acceptable, I can live with it.
I am just surprised that it happens relatively often.
And I am wondering if there are not strategies to compensate for the hardware-related failures.

Friedrich
29) Questions and Answers : Windows : exit code -5 (0xfffffffb) (Message 9054)
Posted 10 Feb 2005 by Profile Friedrich S.
Post:
Hello,

I now can join the "Team of -5", too. On my Pentium 4, 2.8 GHz HT with BOINC 4.13 & CPDN I just lost a model just after the 6th trickle.

Isn't there a way to deal with it by the way the files are written in CPDN?
A strategy like:
1) Write data to temp file.
2) Verify
3) Rename if verify successful, otherwise go back to 1).
4) Build model slowly in incremental files (e.g. every trickle).

And on load:
1) Load file.
2) Verify.
3) Reload if unsuccsessful
4) If still unsuccsessful, load earlier time steps (of incremental files mentioned above) until you reach a stable point and restart from there.

That way you would loose a trickle rather than the whole model. and it would be easier to recover, e.g. by playing back a earlier backup.

Friedrich

30) Questions and Answers : Windows : Seti@home and BOINC conflict (Message 8743)
Posted 6 Feb 2005 by Profile Friedrich S.
Post:
I have Seti@home classic (command line version) and BOINC CPDN running on the same machine. After booting, Seti@Home uses up all CPU-time, just like on your machine.
I found out that when I exit Seti@Home and restart it, it now only uses half of the CPU-time with the other half going to BOINC. My guess is that it might be an issue with which software starts first.
Maybe that works for you, too.
(But I am in the process of switching completely to BOINC anyway. I just need to empty that queue for Seti Classic.)

Friedrich


31) Questions and Answers : Windows : Upgrade BOINC 4.13->4.19: Strange effects on progress? (Message 8710)
Posted 6 Feb 2005 by Profile Friedrich S.
Post:
Hello,

I had some strange effect when unstalling BOINC 4.19:

<b>Machine A: BOINC 4.13 &amp; CPDN</b>
After upgrading via Suspend, then Exit and then installation of new BOINC version without prior deinstallation, the value under "Progress" jumped from 2.18 to 3.6% (or similar, don't remember exact values). Work then seemed to progress much faster, too. Since that seemed strange to me, I exited BOINC (without suspending) and restartet it. Progress was back to the original value of 2.18 and original speed.

<b>Machine B: BOINC 4.19 &amp; Seti</b>
New installation of BOINC on new machine. After some trouble of connecting to server finally it downloaded WU for Seti. I had not done Seti under BOINC so far, but once the calculation started, work progressed so fast, that even without prior experience I could tell something was wrong. I estimate that the SETI-WU would have taken about 15-30 minutes to complete on my Athlon 1200. Impossible!
I exit BOINC and restarted. Progress from there on was much slower, about 1/100% every 2 seconds or ca. 5.5 hours/WU, which seems about right.

Did anybody see similar effects when upgrading to or installing 4.19?

Friedrich
32) Questions and Answers : Windows : HT & CPDN - Let me see if I understand it... (Message 7870)
Posted 28 Jan 2005 by Profile Friedrich S.
Post:
Thanks a lot for your answers!
Once the queue for Seti clasic is empty I am ready to switch from 1 to 2 CPUs.

Thanks again!

Friedrich
33) Questions and Answers : Windows : HT & CPDN - Let me see if I understand it... (Message 7657)
Posted 26 Jan 2005 by Profile Friedrich S.
Post:
Hello,

I have a P4 with 2,8 GHz and HT. I am running CPDN on one CPU and the Seti Classic on the other (emptying the queue).
I am considering to run CPDN only and use HT for that. After reading through the FAQ, Forum and other sites, I am still a little puzzeled, so let me see if I got it right:

1) I can run CPDN under BOINC 4.13 on a computer with HT. And (usually) it does not crash. (There were some earlier messages somewhere where it did.)

2) If I do that, my computer works on 2 WU instead of one, so I need twice as much disk space (2x 700 MB), too.


If the above is right, I have more questions:

a) If I run CPDN only, will HT actually accelerate the calculation?

b) If I run CPDN only, will the WUs still be swapped every 60 minutes (or whatever time intervall I set under preferences)? What/How will they be swapped, e.g. switch processors?

c) Is there a way to temporarily (e.g. 30 minutes) to suspend calculation for just one of the two?

Thanks lot for your help!

Friedrich

34) Message boards : Number crunching : 1st Trickle: Why is Total Credt different from Recent Average? (Message 7505)
Posted 23 Jan 2005 by Profile Friedrich S.
Post:
&gt; &gt; Total Credit: 94.52
&gt; &gt; Rec. Average Credit: 112.63
&gt; &gt; With only one PC and only one result (trickle), should they not be the
&gt; same?
&gt; &gt;
&gt; I think the RAC is calculated for a day. So since your trickle duration was
&gt; less than a day, it adjusted it to what it would have been in a day?
&gt;
That may be it.
I finally found some information on the RAC and how it is calculated and updated.
I guess I better go by Total Credits rather than RAC.

Thanks for the answers!

Friedrich

35) Message boards : Number crunching : 1st Trickle: Why is Total Credt different from Recent Average? (Message 7500)
Posted 23 Jan 2005 by Profile Friedrich S.
Post:
Hello,

I just installed BOINC climatepredition.net (CPDN) and this morning the first trickle was uploaded.
I looked at my account and found the following:

Total Credit: 94.52
Rec. Average Credit: 112.63

With only one PC and only one result (trickle), should they not be the same?

Friedrich



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