Let's see if I've got this right ...

- LHC will clear all credits shortly.
- SETI is recycling old units so there's no new science yet.
- No news from Predictor since 9/22

leaving CPDN as the only currently supported Boinc project doing new science for lasting credits?

> Let's see if I've got this right ...
>
> - LHC will clear all credits shortly.
> - SETI is recycling old units so there's no new science yet.
> - No news from Predictor since 9/22
>
> leaving CPDN as the only currently supported Boinc project doing new science
> for lasting credits?
>
>

SETI is recycling old units? Really? Where did you hear this?




------------------------------------


The game High/Low is played by tossing two nuclear warheads into the air. The one whose bomb explodes higher wins. This game is usually played by people of low intelligence, hence the name High/Low.

SETI classic is doing old WU!
SETI BOINC is here so we don't re do wu, one wu will get done 3 times unless it has a problem, i currently have wu from March, April, May, all from 2004.

Im going to crunch Wu that were recorded on my birthday :) lol.

The rest of what u said is right i think!

Jaaku

^ Click Here ^ ^ Click Here ^ ^ Click Here ^

> SETI is recycling old units? Really? Where did you hear this?

http://setiweb.ssl.berkeley.edu/forum_thread.php?id=4672
http://setiweb.ssl.berkeley.edu/forum_thread.php?id=4630

> > SETI is recycling old units? Really? Where did you hear this?
>
> http://setiweb.ssl.berkeley.edu/forum_thread.php?id=4672
> http://setiweb.ssl.berkeley.edu/forum_thread.php?id=4630
>

I don't see anywhere in either of those where someone said "SETI BOINC is sending out 20 copies of each WU". Paul Buck mentions "spin them wheels" but it was in response to a comment about SETI Classic.






------------------------------------


The game High/Low is played by tossing two nuclear warheads into the air. The one whose bomb explodes higher wins. This game is usually played by people of low intelligence, hence the name High/Low.

All my seti wu are in the April May 2004 except the one Aug 2003 wu.they probably are rechecking something of interest......Norman

> All my seti wu are in the April May 2004 except the one Aug 2003 wu.they
> probably are rechecking something of interest......Norman

If you go back to the SETI@Home Classic site and look at the calendar they have there are tapes in the dark past that have never been tried. So, you can have WU from several years ago and it would still be the first look.

As far as I know, there is no duplication of SETI@Home Classic and SETI@Home on BOINC. If there is, my suspicion would be is that they are letting the Classic folks inicrement the bean and they don't care...

I don't KNOW any of this for sure ... so I am making educated guesses ...
<p>
For BOINC Documentaion: Click Me!

I put the data tapes into the splitter machines, so let me address this.

Basically, there is no set order in which we split the data tapes. The order is certainly not chronological, nor based on interest. Here's how it works.

1. When the splitter runs out of tapes to split, I get an e-mail saying "splitter done".

2. I reach into one of several boxes containing a few hundred tapes in random order which were shipped from Arecibo. Some of well over a year old.

3. I run some preliminary checks to make sure the data doesn't have too much RFI in it, then throw them into the tape stacker.

Then I get back to what I was working on.

- Matt


BOINC/SETI@home

> > > SETI is recycling old units? Really? Where did you hear this?
> >
> > http://setiweb.ssl.berkeley.edu/forum_thread.php?id=4672
> > http://setiweb.ssl.berkeley.edu/forum_thread.php?id=4630


> I don't see anywhere in either of those where someone said "SETI BOINC is
> sending out 20 copies of each WU". Paul Buck mentions "spin them wheels" but
> it was in response to a comment about SETI Classic.


Perhaps my interpretation is wrong but it appears:

- the project isn't releasing any new wu's for classic
- the classic wu's have been crunched multiple times
- units crunched by boinc are the same already done by classic

What I'm unable to find are answers to the following questions:

- how many wu's are commonly shared under both platforms?
- are new wu's being issued strictly for boinc?
- are these new wu's being withheld for classic? why?
- is the file date of the units indicative of their 'newness'?
- how is the data, old or new, being finessed differently under boinc?

Edit: didn't notice the post above. Glad to hear from someone at the mother ship :)

> 1. When the splitter runs out of tapes to split, I get an e-mail saying
> "splitter done".
>
> 2. I reach into one of several boxes containing a few hundred tapes in random
> order which were shipped from Arecibo. Some of well over a year old.
>


Do you get paid for being the Seti 'Splitter-Guy'? I hope they at least toss a case of beer or two your way for the effort. Thats cool!

Rock on!


<a>

Well finally,some real information that is informative and increased my understanding as to how work units are received and put into the program. Thanks again for the eye opener in how not to make assumptions. Read and one will learn!!!!! Norman

> I don't KNOW any of this for sure ... so I am making educated guesses ...

On the other hand, may not so educated ... :)

Thanks Matt ....

So the tapes have been floor sorted ... now I see why the calendar is so weird ...
<p>
For BOINC Documentaion: Click Me!

> I put the data tapes into the splitter machines, so let me address this.
>
> Basically, there is no set order in which we split the data tapes. The order
> is certainly not chronological, nor based on interest. Here's how it works.
>
> 1. When the splitter runs out of tapes to split, I get an e-mail saying
> "splitter done".
>
> 2. I reach into one of several boxes containing a few hundred tapes in random
> order which were shipped from Arecibo. Some of well over a year old.
>
> 3. I run some preliminary checks to make sure the data doesn't have too much
> RFI in it, then throw them into the tape stacker.
>
> Then I get back to what I was working on.
>
> - Matt
>

Awesome. A perfectly scientific approach.




------------------------------------


The game High/Low is played by tossing two nuclear warheads into the air. The one whose bomb explodes higher wins. This game is usually played by people of low intelligence, hence the name High/Low.

> Awesome. A perfectly scientific approach.

Yeah, I like it too. I really do (this is not a sarcasm of any sort).
It is kind of a way I expected it to be.
;-)


BOINC@Poland: Polish crossproject team.

http://mchl.republika.pl/boincatpoland/

- Join -

Matt,
Thank you for your explanation, I am sure it helps others beside myself understand how things work.
I Am also glad to see you back on the Boards. Thanks for all you do, and of course, keep up the MUSIC CAREER!!



Have A Great Day And A Better Tomorrow!

Warm Regards,


Rocky Cudd

Allow me to try to shed more light on how splitting works, to perhaps answer some more questions:

The same tapes are being using to make SETI@home classic workunit as well as SETI@home/BOINC workunits. When I put a tape in the drive, both old and new style workunits are made on the same data.

As well, the same science (or almost exactly the same) is being done in both the old and new clients, so when signals get thrown into the master database, they look the same. A spike is a spike is a spike.

Some may immediately pounce on this as pointlessly redundant (i.e. you *?!*ers at Berkeley are wasting my precious CPU cycles), but actually there is a good scientific reason for this. As we all know BOINC is still working some kinks out of the system, and we need to make sure the science reported by the new clients is sane, and the best way to check that is by comparing new signals against old signals. Okay maybe this is obvious.

Of course, this isn't exactly working perfectly all the time. In order for tapes to proceed down the splitter pipeline, both old and new splitters need to wrap up splitting on it. So when BOINC chokes for some reason, or the old system is acting up, this gums up the works for everybody. In the case of BOINC, we just run out of work, but in the classic system we end up sending out the same workunits over and over. Redundancy is good, but even I admit that too much is bad, and that's why BOINC is made to run out of work (and allow users to work on other scientific endeavors while we get our act together).

So sometimes it seems like we're not producing new work for the classic system, but in fact we are - just very slowly. This is a problem that doesn't get much attention because we are short staffed and anyway it'll be moot when everybody moves to BOINC eventually.

Okay.. back to work..

- Matt
BOINC/SETI@home