BOINC NFS sieving - NFS@Home

[fivemack]

Originally Posted by pinhodecarlos

A few years ago, ~10 years, the US-Distributed team had the simple way to build a farm of computers by using baskets (I'm missing the name of the thing). They managed to connect two motherboards with only one PSU. The baskets were easily put above each other making like a tower. It was a very simple way to build a farm without having to buy a case box for each machine. If I remember they called each basket a node.

That made a lot of sense when the cases and PSUs are a substantial fraction of the cost of the minimal machine that would work; if you're having to put $550 network cards into every machine, saving $100 on the metalwork is less appealing, particularly when the machines have a network card sticking out of the top and stack less well than bare motherboards would.

(IIRC the ten-years-ago computers tended not to have 15cm-high heatsinks on the CPUs)

[frmky]

Yes it does, but it will also do best with the LA. I definitely recommend the i7, a.k.a. m, for the S3m637 postprocessing. Just be sure to use only 4 threads and ignore hyperthreading during the LA. For the postprocessing of the smaller numbers any of the i5's, 1-4, will be great. The Athlon II X4 will be somewhat slower, and the Phenom simply can't do it with 32-bit Linux.

[pinhodecarlos]

Originally Posted by frmky

I'm doing that for the remaining S3m637 tasks now so it should be ready in a day or so.

I think S3m637 is already ready for post-processing.

[frmky]

Originally Posted by pinhodecarlos

I think S3m637 is already ready for post-processing.

It would be fine now, but the remaining half million relations will be done in about 6 hours. I'll post the files for download then.

Edit: It's now officially ready to download.

[pinhodecarlos]

Xyzzy, how much uncompressed gives the 17 GB file? Can you then post the LA ETA? I suppose you will be running it on your Intel(R) Core(TM) i7-3770K CPU, is it at stock speed? With msieve you can overclock but not too much. If overclocking is stable for LL then it is sure to be also stable for msieve.

[debrouxl]

If overclocking is stable for LL then it is sure to be also stable for msieve.

Unless the memory controller / RAM sticks are not up to the task. A computer can be Prime95 stable but not msieve stable.

[Xyzzy]

All of our boxes are at stock speeds.

We think we may have messed up the settings for the BOINC Manager. We lost a lot of results that say "Aborted by project" next to them. And we have a pile of similar work queued up!

How do we reset all of the computers to the right settings? Our goal is for the computer to upload a result as soon as it is completed. This morning there was a screen full of unsent results.



Edit: Both 28456 and 28459 have 0 results today.

[Xyzzy]

Xyzzy, how much uncompressed gives the 17 GB file?

We are downloading it right now.

We have the impression, from compiling msieve, that msieve can work with the gzipped .dat file. Is that correct?

[pinhodecarlos]

The abort wu's will be re-tasked, don't worry.

Yes, msieve can work with gzipped .dat file but I don't recall if it is slower than using the dat file. Anyway, I always decompress it to use only the dat file and finally before I start msieve I move the gzipped .dat to a backup folder.

[Xyzzy]

Xyzzy, how much uncompressed gives the 17 GB file?

-rw-rw-r-- 1 m m 18402532003 Sep 13 12:13 S3m637.dat.gz
-rw-rw-r-- 1 m m 35115064399 Sep 13 12:13 S3m637.dat

[frmky]

Originally Posted by Xyzzy

We think we may have messed up the settings for the BOINC Manager. We lost a lot of results that say "Aborted by project" next to them. And we have a pile of similar work queued up!

How do we reset all of the computers to the right settings? Our goal is for the computer to upload a result as soon as it is completed. This morning there was a screen full of unsent results.



Edit: Both 28456 and 28459 have 0 results today.

It's all exactly as it should be!

I instructed the server to send all remaining 8647_61_minus1 workunits to your computers, including ones that have been sent to others. This process cuts off the long tail that otherwise results. However, some of these workunits were returned by other users after they were sent to you. When this happens, the server tells your computer that the workunit is no longer needed, hence "Aborted by project." If both you and the other user happen to complete the workunit, you will both get credit for it.

BOINC batches result reports to reduce load on the server. If you want the results to report immediately, you need to make a manual change in the configuration. See http://www.boinc-wiki.info/Report_results_immediately for details.