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Author | Message |
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Richard Haselgrove Send message Joined: 4 Jul 99 Posts: 14650 Credit: 200,643,578 RAC: 874 |
I'll stick with 'correlation', though I agree it certainly isn't 'equivalence' Hypothesis: Incompressible tapes may also be radar blanked (OK) Compressible tapes are always reported to be blanked (possible bug or hardware failure) |
jason_gee Send message Joined: 24 Nov 06 Posts: 7489 Credit: 91,093,184 RAC: 0 |
may or may not be related, though one small thing I stumbled across in assembling up to date info, is a documented vulnerability to do with reading from files, whereby there could be issues upon missing EOF or other read failure... specifically in some seti@home code, that appears to be still there. The Ultimate Question of Programming, Refactoring, and Every Item #20 appears to be referring to current code at least in MB, specifically in the db folder, but I suspect may be used in AP and splitter code as well (not sure). [Edit:] 'stuck tapes' comes to mind first, but it seems there are other possible side effects described. "Living by the wisdom of computer science doesn't sound so bad after all. And unlike most advice, it's backed up by proofs." -- Algorithms to live by: The computer science of human decisions. |
Richard Haselgrove Send message Joined: 4 Jul 99 Posts: 14650 Credit: 200,643,578 RAC: 874 |
And remember that Astropulse was first written by a student programmer (OK, Josh was a PhD student at the time, but I don't think he was a student of programming). So elementary mistakes are always a possibility. |
rob smith Send message Joined: 7 Mar 03 Posts: 22186 Credit: 416,307,556 RAC: 380 |
I'd go with your hypothesis Richard. Bob Smith Member of Seti PIPPS (Pluto is a Planet Protest Society) Somewhere in the (un)known Universe? |
Brent Norman Send message Joined: 1 Dec 99 Posts: 2786 Credit: 685,657,289 RAC: 835 |
I compressed a quite a few AP tasks, would anyone want them to run offline? |
Cosmic_Ocean Send message Joined: 23 Dec 00 Posts: 3027 Credit: 13,516,867 RAC: 13 |
The traditional "stuck bit" compressability makes sense, and the 100% blanked non-compressability also does. The "blanking" happens where there is radar, or other interference present, but data is still recorded there. Before v7, these blanked areas were filled with pseudo-random data, since the jury was still out on whether pseudo-random was better, or if writing zeroes was. I remember Joe had done some tests with some data files where zeroes were overwritten to the blanked areas, and that introduced a few pulses to the final output, and it was never decided whether or not those pulses were authentically present, or if they only became detectable because of the hard boundaries of data and then digital silence. Then v7 decided to forego processing the blanked areas of WUs (after extensive testing, of course) which means it doesn't really matter what gets put in those blanked regions now, as long as we know there are blanked regions--which I recalled recently how that works. (For more reference, I did some searching to find when this info was mentioned, and found Jun 02 2010 tech news post, which referenced May 04, 2010 scientific letter about radar blanking.) Linux laptop: record uptime: 1511d 20h 19m (ended due to the power brick giving-up) |
kittyman Send message Joined: 9 Jul 00 Posts: 51468 Credit: 1,018,363,574 RAC: 1,004 |
Have been getting some more APs.... The kitties hope they are not the little bite-sized ones. "Freedom is just Chaos, with better lighting." Alan Dean Foster |
Jimbocous Send message Joined: 1 Apr 13 Posts: 1853 Credit: 268,616,081 RAC: 1,349 |
Have been getting some more APs.... Mostly catnip, not kibble, I'm afraid ... |
kittyman Send message Joined: 9 Jul 00 Posts: 51468 Credit: 1,018,363,574 RAC: 1,004 |
Have been getting some more APs.... Oh, meowsigh. "Freedom is just Chaos, with better lighting." Alan Dean Foster |
kittyman Send message Joined: 9 Jul 00 Posts: 51468 Credit: 1,018,363,574 RAC: 1,004 |
The kitties are still slowly sniffing a few out. One or two here and there. Have 123 onboard now, 8 rigs asking. Have crunched a few. Couple had meat on them, but the rest pretty much went 'poof'. Which frustrates the kitties...... "Freedom is just Chaos, with better lighting." Alan Dean Foster |
JaundicedEye Send message Joined: 14 Mar 12 Posts: 5375 Credit: 30,870,693 RAC: 1 |
Nothing so far on this lot, the last batch out of 33 just 9 had substance. The remainder were a smoke enema....... "Sour Grapes make a bitter Whine." <(0)> |
betreger Send message Joined: 29 Jun 99 Posts: 11361 Credit: 29,581,041 RAC: 66 |
That does not sound very uplifting. |
Jimbocous Send message Joined: 1 Apr 13 Posts: 1853 Credit: 268,616,081 RAC: 1,349 |
Ah, Dried Catnip .... |
betreger Send message Joined: 29 Jun 99 Posts: 11361 Credit: 29,581,041 RAC: 66 |
66 between 3 boxes, mostly radar but 2 so far had substance. |
JaundicedEye Send message Joined: 14 Mar 12 Posts: 5375 Credit: 30,870,693 RAC: 1 |
Got 17 from the latest batch..........100% NADA, NOTHING. ZILCH. [edit] I take that back, but this is strange. This job took 4sec to run, is 100% Radar Blanked and both I and 1 wingman received 400+ credit.........????? https://setiathome.berkeley.edu/workunit.php?wuid=2301806458 "Sour Grapes make a bitter Whine." <(0)> |
Cruncher-American Send message Joined: 25 Mar 02 Posts: 1513 Credit: 370,893,186 RAC: 340 |
In this last batch, my 3 machines got upwards of 250, but 3/4 or more were 100% blanked. Maybe as many as 90%. But some of those blankies got 4-500 credits because the SETI Gods have relented a bit. |
rob smith Send message Joined: 7 Mar 03 Posts: 22186 Credit: 416,307,556 RAC: 380 |
Because your wingman has yet to complete the required 11 "normal" APs to get their system properly calibrated. Both parties get the same credit, the lower of the two calculated, and normally when one client is not calibrated that is the one that is selected. Bob Smith Member of Seti PIPPS (Pluto is a Planet Protest Society) Somewhere in the (un)known Universe? |
BilBg Send message Joined: 27 May 07 Posts: 3720 Credit: 9,385,827 RAC: 0 |
To add to the 'correlation': Name Size Packed Size ap_27no15ab_B2_P0_00197_20161021_05174.wu 8 392 048 8 250 520 ap_27no15ab_B4_P0_00256_20161022_08517.wu 8 392 049 8 173 070 ap_26no15ab_B6_P1_00143_20161021_00467.wu 8 392 046 8 157 098 ap_26no15ab_B4_P0_00390_20161021_06722.wu 8 392 046 8 144 967 ap_29ja16ab_B4_P1_00386_20161022_20839.wu 8 392 048 8 143 932 ap_26no15ab_B4_P1_00216_20161021_07988.wu 8 392 048 8 091 656 ap_27ja16ab_B4_P1_00046_20161021_18744.wu 8 392 046 8 053 604 ap_27ja16ab_B6_P1_00049_20161022_14654.wu 8 392 043 7 751 095 ap_29ja16ab_B1_P0_00184_20161021_28890.wu 8 392 047 7 199 112 ap_29ja16ab_B2_P1_00214_20161022_02854.wu 8 392 047 6 649 418 ap_29ja16ab_b1_p0_00184_20161021_28890.wu_1 00:00:05 (-), percent blanked: 100.000 ap_26no15ab_b4_p1_00216_20161021_07988.wu_2 00:00:05 (00:00:01), percent blanked: 100.000 ap_26no15ab_b4_p0_00390_20161021_06722.wu_1 00:00:05 (-), percent blanked: 100.000 ap_27no15ab_b2_p0_00197_20161021_05174.wu_0 00:00:05 (-), percent blanked: 100.000 ap_26no15ab_b6_p1_00143_20161021_00467.wu_0 00:00:05 (-), percent blanked: 100.000 ap_27ja16ab_b4_p1_00046_20161021_18744.wu_0 00:00:05 (-), percent blanked: 100.000 ap_27ja16ab_b6_p1_00049_20161022_14654.wu_0 00:00:05 (-), percent blanked: 100.000 ap_29ja16ab_b2_p1_00214_20161022_02854.wu_1 00:00:05 (00:00:01), percent blanked: 100.000 ap_27no15ab_b4_p0_00256_20161022_08517.wu_0 00:00:05 (00:00:01), percent blanked: 100.000 ap_29ja16ab_b4_p1_00386_20161022_20839.wu_1 00:00:05 (-), percent blanked: 100.000 One of them received a full Credit 469.26 http://setiathome.berkeley.edu/results.php?userid=8647488&offset=0&show_names=0&state=4&appid=20 I still keep all the WUs from the 3 batches, will you need any of them or can I delete them to free HDD space? Â - ALF - "Find out what you don't do well ..... then don't do it!" :) Â |
Kiska Send message Joined: 31 Mar 12 Posts: 302 Credit: 3,067,762 RAC: 0 |
If you don't want to store the unit files on your computer, then you can store them on my Google Drive, that is available to everyone to view and download. I just need an email so I can allow uploads |
Keith Myers Send message Joined: 29 Apr 01 Posts: 13164 Credit: 1,160,866,277 RAC: 1,873 |
Looks like we have one tape being splitted for AP tasks. That's great and all but I wish we could work through the backlog of AP tasks awaiting validation and db purging. I have some AP tasks that have been sitting awaiting validation with wingmen also awaiting validation for over a month. Strange thing is that newer AP tasks have finished up, been validated and purged already. Don't know why they are not being processed in FIFO order. I need two of my completed CPU tasks to get validated and registered as completed in the database to get my AP CPU APR calculated realistically on my newest computer. Seti@Home classic workunits:20,676 CPU time:74,226 hours A proud member of the OFA (Old Farts Association) |
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