PrimeGrid Double Checking

Good at maths? Then why not figure on helping these projects - BURP, Citizen Science Grid, Collatz, Enigma, Gerasim, Moo! Wrapper, NFS, NumberFields, PrimeGrid, WEP+M2.
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ChelseaOilman
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PrimeGrid Double Checking

Post by ChelseaOilman » Sat Aug 22, 2020 2:36 pm

Just a heads up that there has been a bunch of chatter in the PrimeGrid Discord server that they're trying out a new system that handles the double checking of tasks. As far as I know it's only starting to roll out on the TRP tasks right now. Apparently because of their current server setup they can only use this new system on the larger tasks.

ChelseaOilman
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Re: PrimeGrid Double Checking

Post by ChelseaOilman » Sun Aug 23, 2020 2:22 pm

Magic Mike (Wear a Mask: YLM)Today at 8:05 AM
For this (and other) reasons, most projects configure BOINC to require every task to be run twice. The two results need to match exactly for the tasks to be validated.
[8:07 AM]
On of our developers created a method for essentially eliminating that second task. There's some fancy math (it's over my head, honestly) that's used to run the second task in less than 1% of the time it would normally take. As a result, we effectively aren't wasting half of our computing power double checking everything.
[8:08 AM]
A side benefit is that another improvement self-corrects more computation errors, so the project has less wasted computer time, and users don't lose credit (and waste their resources) because of an error.
[8:09 AM]
@ATN Flux (aka Smart Cookie) Is the guy who made this possible.
[8:09 AM]
We've just rolled this out on one of the projects recently.
[8:10 AM]
Here's a forum thread talking about it... https://www.primegrid.com/forum_thread.php?id=9269

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Re: PrimeGrid Double Checking

Post by UBT - Timbo » Sun Aug 23, 2020 4:07 pm

Hi Carl

Thanks for the heads up.

So, from what I gather:

*It's no longer down to luck, if you are the 1st or 2nd "finder" of a Prime...which makes it more exciting when you do find a Prime.
*The "double checking" routine is now much shorter (faster) and hence credits earned will be lower (as less time taken to confirm the result).

One wonders why someone didn't figure out this new "checking" procedure before now...how long has PG been running? At least 13 years IIRC.

regards
Tim

ChelseaOilman
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Re: PrimeGrid Double Checking

Post by ChelseaOilman » Fri Sep 11, 2020 9:04 pm

Magic Mike (Wear a Mask: YLM)Today at 2:30 PM
Ok, it looks like the following projects have been moved over to LLR2 (you can tell because the version number is 9.00 in the apps page):
321
Cullen
Woodall
PSP
Sob
ESP
It will take some time for the already existing work units for the old LLR to get sent out, so you will still get some old ones for a while.
But those guys are now live and the fast DC tasks are in the queue.
That also means that once the old tasks are used up, there’s no more Tasks for Mac.

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