Posts by dentaku

61) Message boards : BOINC Manager : 5.10.8 Linux 64 Bit: libtiff.so.3: cannot open shared object file (Message 11224)
Posted 25 Jun 2007 by dentaku
Post:
Yahoo - run_manager works now! But the GUI of the BOINC manager looks ugly! It looks like some 20 year old GUI (like earliy versions of BOINC) on my Ubuntu Linux. It seems it uses some oldish GUI toolkit (tcl/tk?). How can I get back the better GUI?
62) Message boards : BOINC Manager : Disc size can't be changed!? (Message 11223)
Posted 25 Jun 2007 by dentaku
Post:
The installation partition (my /home directory) is 49.7 GB and in BOINC manager, tabulator "Disc" it also says:

free disc space: 49.69 GB
used by BOINC: 993.61 MB
used by other programs: 26.11 GB

Yes all my 4 projects (SETI@home, climateprediction, Rosetta@home, World community grid) are live and crunch (even though since today, Rosetta isn't doing anything anymore after my first work unit finished with a client error yesterday (the task tabulator just shows WUs of the other 3 projects).
63) Message boards : BOINC Manager : 5.10.8 Linux 64 Bit: libtiff.so.3: cannot open shared object file (Message 11217)
Posted 25 Jun 2007 by dentaku
Post:
YEs, the client runs (text mode in shell). BUt I want to see progress and infos in the manager. So I went back to 5.8.17.
64) Message boards : BOINC Manager : Disc size can't be changed!? (Message 11215)
Posted 25 Jun 2007 by dentaku
Post:
Well the project pages say this, e.g.

Rosetta@home > Computers at this account (View) > (Click Computer ID) > Total disk space: "76.77 GB"

SET@home > Computers at this account (View) > (Click Computer ID) > Total disk space: "76.77 GB"

Years ago, when I first used SET@Home (classic) and migrated to BOINC SETI@home, I had a 80 GB harddisc (with several partitions) - on Windows. I upgraded every now and then to a new BOINC Version, also upgraded my computer and also my harddisc (now: 500 GB with several partitions). So, this value "76.77" once was the (total) capacity of a former harddisc and I can't change this value via edit preferences (or anywhere else I've searched).


Well, I found the page were I read this about the hard disc storage for the point calculation: World Community Grid (http://www.worldcommunitygrid.org/help/viewTopic.do?shortName=points):

"Hard Disk Storage: On your preferences page, you set the megabytes of hard disk space allocated and available to World Community Grid projects. The lesser of the amount of hard drive space allocated and the amount of total space available on your hard drive partition, is divided by the Hard Disk Storage value of World Community Grid Comparison Device. The result of this calculation is then multiplied by the run time used to complete the work unit and return the results to World Community Grid Servers."

So, the harddisc storage is taken into account when calculating points - right?
65) Message boards : BOINC Manager : Disc size can't be changed!? (Message 11194)
Posted 25 Jun 2007 by dentaku
Post:
I can see this old value in every project website status page of my account - and can't change it there. I read somewhere the the amount of credits is also calculated by the size of the harddisc ...

And as you can see in the screenshot above, there is no such preferences field in the simple view preferences.
66) Message boards : BOINC Manager : 5.10.8 Linux 64 Bit: libtiff.so.3: cannot open shared object file (Message 11192)
Posted 25 Jun 2007 by dentaku
Post:
I downloaded the 64 Bit Version boinc_5.10.8_x86_64-pc-linux-gnu.sh and tried to run it on Ubuntu 7.04 64 Bit:

-------------
> ./run_manager
./boincmgr: error while loading shared libraries: libtiff.so.3: cannot open shared object file: No such file or directory
----------------

I checked the installed packages with Synaptic and libtiff is installed on my system! What's the problem here?
67) Message boards : BOINC Manager : Disc size can't be changed!? (Message 11191)
Posted 25 Jun 2007 by dentaku
Post:
Depending on BOINC version:

Pre 5.8, go to the project website, your account, general preferences, edit general preferences and set the amount of disk space you want BOINC to use, save changes to the website, Open BOINC Manager, select the project you changed the preferences at and press Update.

5.8, BOINC Manager, View, Simple View, Preferences, check "I want to customize my preferences for this computer only" and change the disk size preference. Click Save.

5.10, BOINC Manager, Advanced View, Advanced, Preferences, Disk and Memory Usage, set the disk space you want to use and click OK.


I have BOINC 5.8.17 on Ubuntu Linux 7.04 and there is no "I want to customize my preferences for this computer only"! My preferences dialog looks like this:

http://img505.imageshack.us/img505/1323/bildschirmfotoiz5.png

This "use no more than 20 GB of disk space" is something different. The old value I can't change is 75 GB.
68) Message boards : BOINC Manager : Disc size can't be changed!? (Message 11188)
Posted 24 Jun 2007 by dentaku
Post:
In my online preferences, I see "Total disk space" that is still my very old harddisc that I had when first joining a BOINC project. I haven't found any preferences page where i can change this size ... am I blind?
69) Message boards : BOINC client : Java Version - when does it come? (Message 7000)
Posted 18 Dec 2006 by dentaku
Post:
2005 is "ages" in computer science - you should know. The latest Java 1.6 improved significantly over the former 1.5. I would love to re-write SETI@home in Java if it would work within the BOINC client - at least the pure number crunching part. My Java fractal generator is already as fast as most other fractal generators - with dump brute force calculation. I'm just starting to dive into optimizations. With plain technical optimizations, a lot can already be done. Other logic optimizations are dependend on the fractal and/or the image (type).

Concerning benchmarks: they only tell the half truth. You will get a false interpretation if you just rely on Benchmarks (no matter if the benchmarks shows that Java is slower or faster). But of course they can help to get an idea - if you consider lots of benchmarks from lots of different authors/coders.

Here's news about Java 1.6 performance increase compared to other/former JVMs: http://blogs.sun.com/dagastine/entry/java_6_leads_out_of

I can acknowledge this as our company server applications benefit heavily from this improvement (5 - 30% increase!). And as I've already mentioned: my fractal generator runs twice as fast for deeper zoomings.

So, you also have to consider what version of Java those Benchmarks use. Java 1.6 is considerably faster!
70) Message boards : BOINC client : Java Version - when does it come? (Message 6980)
Posted 16 Dec 2006 by dentaku
Post:
@Ageless: yes, but this is a very time consuming project. Right now, I'm working in my rare spare time (I have 2 kids ...) on my own multithreaded fractal generator. This already takes up too much time, but I love it. Porting requires a lot of time just to understand the original code and the other source code languages.
71) Message boards : BOINC client : Java Version - when does it come? (Message 6978)
Posted 16 Dec 2006 by dentaku
Post:
Java is not "too slow" as you would see if you would search google for _current_ comparisons. And how could you tell that Java is "much slower"? You didn't code Java versions of the BOINC projects, did you? Java was slow compared to other languages (i.e. compiled static code from C, C++, etc.) in the early years. Since then, many people just kept this "fact" and think that Java was slow and still is slow. But fact is, that the current Java 1.6 HotSpot JVM is very fast and often _much_ faster than compared statically compiled C/C++ binaries. Of course, you can find benchmarks that show that C/C++ is faster ... as you can find benchmarks telling the opposite. This just shows that it depends on the case. But it also shows that Java is not slower or "much slower" in general. (In our company, we reimplemented several VB and C application in Java resulting in performance increases of several 100% ... no joke! Java 1.6 shows an average performance increase of 25% just be replacing the Java 1.5 JVM with the Java 1.6 JVM.)

I wrote fractal generators since Commodore 64 times on several architectures, operating systems and languages (Basic, Pascal, Oberon, C, Java) and the current Java HotSpot VMs are not slower than compiled C code - not at all.
72) Message boards : BOINC client : Java Version - when does it come? (Message 6970)
Posted 14 Dec 2006 by dentaku
Post:
BOINC doesn't do ANY science crunching. That is done by the science application on each project, and these are written in whatever language is appropiate for their purpose.

Climateprediction models for instance are in Fortran, because the project uses the UK Met Office's supercomputer programs, all written over many decades in Fortran.


I know that BOINC itself doesn't crunch but the specific projects. But they have to be in a specific format as they must somehow be executed! You obviously can't write a project for BOINC in Java because BOINC doesn't run in a Java VM. So the projects need to be compiled first into machine code, right?
73) Message boards : BOINC client : Java Version - when does it come? (Message 6964)
Posted 14 Dec 2006 by dentaku
Post:
I never understood why BOINC is not written in Java or at least a Java version is offered.

In our office we noticed a speed increase of 10% - 30% for our server applications (HotSpot VM) compared to the former 1.5.0_09 version on Windows 2000.

Today I downloaded the new Java 1.6 JDK (for my 64 Bit Ubuntu Linux) and my Fractal programm runs _twice as fast_ as with the former 1.5.0_08 version!!!

BOINC projects/tasks have a similar structure as my fractal programm: they are pure number crunching algorithms. A Java version would instantly benefit from the new Java Version without any programm update. I guess, with the new Java 1.6, a Java version would also be faster than any statically compiled native code (as the Java HotSpot VM compiles highly optimized native code during runtime).

You also wouldn't have to offer specific versions for all the different operating systems and specific 64 Bit versions - just one single Java version that also performs automatically better on a 64 Bit Java VM. Or with a new Java virtual machine, as now seen with Java 1.6!


Previous 20

Copyright © 2024 University of California.
Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation.