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1) Message boards : Problems and Help : All my GCW tasks are failing on DO droplets (Message 153622)
Posted 14 hours ago by Profile Michael GoetzProject donor
Yeah, I think turning on virtual memory may solve the problem. Some LLR2 tasks, including GCW, use a bunch of memory for storing the data for the files sent back to the server. This may exceed 1 GB, and we have seen this problem ourselves. The solution is to enable virtual memory.

Add this to your startup script for the droplets. You can also run it manually right now on your existing droplets. I suspect it will fix the problem.

# enable swap file for PrimeGrid GCW/SR5 fallocate -l 5G /swapfile chmod 600 /swapfile mkswap /swapfile swapon /swapfile # make it permanent in case of reboot sed -i '$ a\/swapfile swap swap defaults 0 0' /etc/fstab


It's a simple fix and it doesn't affect performance. This memory is written once and read once, so it's not thrashing the swap file.
2) Message boards : Problems and Help : All my GCW tasks are failing on DO droplets (Message 153621)
Posted 15 hours ago by Profile Michael GoetzProject donor
It’s usually best to use Discord for anything related to TSC problems. Or are you running your own droplets?

If they are your own, what’s the configuration of the drioplets and how many tasks are running on each one? Also, did you configure swap space? It’s useful for when some tasks like GCW store checkpoint data.
3) Message boards : Number crunching : Sabotage of Number Crunching (Message 153599)
Posted 1 day ago by Profile Michael GoetzProject donor
No more wunked tasks ?!

I love how wunk has become a verb.
"You totally wunked your computer."
It is particularly favourable to me as it seems it has no judgment attached to it.
We all have dewunkifying software promising to dewunk.
Moral: If you run computers with no attention to outcome for a long time, your name may become a verb.


Mine is already a verb, or at least a homophone of one. (The “o” is silent.)
4) Message boards : Generalized Fermat Prime Search : Guess the number of digits in the LAST GFN-17-LOW prime (Message 153594)
Posted 1 day ago by Profile Michael GoetzProject donor
And we are done!

All of the candidates with more than 999,937 digits have now been double checked, and 42550702^131072+1 is the largest GFN-17-Low prime.

This makes Monkeydee officially the winner of the guessing contest! Congratulations!!!
5) Message boards : Number crunching : Sabotage of Number Crunching (Message 153578)
Posted 2 days ago by Profile Michael GoetzProject donor
As Michael already asked, what specifically is the damage they cause to the project? The only thing is a small additional load on the BOINC server.

I can see how it's irksome, but it doesn't slow down progression at all. Btw, if you want to get annoyed have a look at the oldest unfinished SoB WU, it's from last summer and it seems another user that doesn't finish tasks picked it up. ;)


That's actually an interesting one.

The third task was sent out in August, and that computer has been slowly chugging away at the task. It's currently 89% done, and lately has been doing at least 1% per day. If it keeps this up, it will finish in one to two weeks. This is despite having exceeded the deadline and having been timed out by the server.

In the meantime, a week ago the server sent out a replacement task, and so far that task has done nothing. It's likely that the third, expired, task at 89% will finish before the fourth "alive" tasks does.

This is, of course, LLR2, so at least there's no wingmen waiting, like in the good ol' days.

Computers have far more patience than do people. :)
6) Message boards : Antarctic Crunchers message board (Message 153554)
Posted 3 days ago by Profile Michael GoetzProject donor
I just switched over to PPSE for cpu, but have had really good luck with SGS. That is what was recommended a few years ago. Wiill see how PPSE pans out.

Is GFN15 no longer worth it? I'm doing 15-16 currently on google colab.


Neither GFN-15 nor SGS are eligible for TdP this year. You can run them, but they won't earn you anything in TdP. The smallest tasks you can use to earn TdP badges this year are GFN-16 and PPSE.
7) Message boards : Number crunching : Tour de Primes 2022 (Message 153538)
Posted 4 days ago by Profile Michael GoetzProject donor
We will have GFN-16 as entry-level primes and then only MEGA in future.
Or new project needs to be introduced...


How about SR3?


(For those not familiar with SR3, that's a joke. SR3 has an absolutely ridiculous number of k's to be proven. There's over three quarters of a million k's remaining.)
8) Message boards : Number crunching : Tour de Primes 2022 (Message 153534)
Posted 4 days ago by Profile Michael GoetzProject donor
#SavePPSE

At least until Mountain Stage Day, so we can get those last TdP badges! 😃 🏅

I'll even commit to running CPU on it exclusively until then, and forgo running GFN-16/17 while PPSE is still in the Top5K.


The initial announcement specifies " Even if PPSE drops off the T5K list during TdP, it will be eligible for TdP for the entire month."

This does leave open the possibility that PPSE will drop off of the T5K list *before* the TdP, but this seems unlikely (if that is indeed even the intent).


To be clear, PPSE is included in TdP 2022, no matter what.

EDIT: I changed the introductory post to clarify this rule.
9) Message boards : Generalized Fermat Prime Search : GFN-17-LOW will finish soon (Message 153518)
Posted 5 days ago by Profile Michael GoetzProject donor
Currently there are between 100 and 200 candidates remaining. All of them have one result already; the server is waiting for the wingmen to return their tasks. The project will technically be “open” until the last task is returned, as from time to time one of those remaining tasks may need to be resent to another computer. Mostly, however, there will be no tasks available.
10) Message boards : Antarctic Crunchers message board (Message 153507)
Posted 6 days ago by Profile Michael GoetzProject donor
Not to sound like a dumb a$$ or anything ha ha but..... challenge cleanup... So doesthat occur just like normal crunching? As i just keep crunching gfn17 and the server will just hand out the cleanuo tasks like regular tasks?


Correct.

But...

The truth about cleanups is that mostly they're about waiting for abandoned tasks to time out and be resent by the server. Mostly, all the cleanup tasks have already been sent out to be crunched. Most of them will be crunched successfully, but a few won't.

So there's usually not a whole lot of cleanup tasks available. Often, none at all. Cleanup tasks, when available, are shown on the front page like this:

* Only 20 tasks, 12 affecting scoring positions, of Geminids Shower Challenge (GFN-21) cleanup work are currently available! *


If the message is red, there's a lot of them available. If it's not red, then the number is fairly insignificant.

At the moment, there's no GFN-17 cleanup tasks available.

These numbers are updated every 15 minutes.


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