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do seti wu's "expire"...

L

ledzepp98

Golden Member
i took a look at the faq at the seti website and didn't see an answer, so i'll ask here...
let's asume i can convince a friend to run the seti cli in the background, but i don't wan't him to bother with going online and sending data, etc... i know that seti driver can be set up to do this automatically, but lets say that i don't want any automatic connection or anything like that...only when i'm there. now, if i cache a big bunch of wu's do they expire after a certain amount of time where the workunit will get re-sent to someone else and i will not get credit when that work unit is finally returned?
 
I have held onto them for months for one reason or another and always got credit, so I don't think so.
Just be careful of a forced client upgrade like what happened this past February.
 
you'll always get credit for a wu done. but seti considers the wu lost after 4 weeks.
 
I have a question:

If I computed a work unit but didn't send it in. I then sent you those files, you changed the name and sent it in would you get the credit?

What would happen if I then sent it in too?

Does SETI have a way to prevent this cheating?


 
i'm not totally sure about that last question but i think that since each wu is a spicific segment (based on exact sky location i guess?) it will only be counted once, and credit given to the first person who turned it in. i have accidentally tried to send the same results back from 2 different computers, but with the same id name...i only got credit once. basically, i had a non-internet computer crunching and when it completed a few wu's i put them on floppy to transmit from my computer. i left them on the first computer just in case...all went well but i forgot to delete them from the first computer and when i hooked it up to the internet i sent those wu's in again without realising they were a repeat...anyway, nothing came up telling me this but my total wu's didn't include the repeated wu's
 
You can't send in WU that have already been processed.

Who ever user file is in the directory when the results go back gets the credit.
 
If the same WU is sent back by difference users, it will be counted for each user (SETI checks each unit between 2 and 4 times on average). If the same user sends back the same WU within about a 2 week period, only the first one will be counted. However, after that period, the SETI servers assume the WU was sent back out for rechecking and you just happened to get it again. The WU will be counted.

Yes, this is a way to cheat ... and yes, some people have done it. No, I don't recommend doing this to inflate your totals. SETI@Home has caught and banned people for this. Basically, doing this once or twice, probably won't raise any flags, but do it a significant amount, and someone will notice, someone will investigate, and you will probably get banned.

JHutch

PS Yes, I know it works this way, because I duped about 5 or 6 WU this way, accidentally, quite a while back.
 
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