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What's happening... (Nov 8, 2014)
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Author | Message |
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Eric Korpela Send message Joined: 3 Apr 99 Posts: 1382 Credit: 54,506,847 RAC: 60 |
Here's a long overdue status update that will hopefully answer some of the questions you may have about the last week. 1. Bruno started hanging with a "stuck cpu" linux kernel message. I don't know what causes this sort of thing. Moving all the services except uploads to other machines seems to have solved the problem, so far. Next week we're planning to replace Bruno with a Sun X4540 that the Lab was removing from service. 2. Around the same time, the Astropulse assimilators started failing with a message "-603 Cannot close TEXT or BYTE value." Turns out we had run up against another informix limit. I'm resolving that, but it's looking like we are only 1/8th of the way done after 24 hours. Until it's done we won't be able to generate Astropulse work. 3. New Data. Finally, in the last few weeks, we've gotten some data from 2014 split and out the door. Not a lot, though. There are a few reasons why it took so long. First, the Arecibo itself and the ALFA receiver that we use for SETI@home was offline for much of 2014 (mostly January to June), so we don't have that much data. Second, because of funding, Astronomy isn't top dog at Arecibo anymore, so Astronomers get a smaller fraction of the observing time. And compounding it is that disks are bigger and we don't send a box until it's full (to save on shipping costs), so it takes longer to fill a box of disks. Which brings us to... 4. Old Data. We have been working on old data. It's not a "make work" thing. Most of the data we've been sending had a problem the first time around. Either part of the data was left unprocessed, or the results were questionable. In addition, all the old data that has been sent had not been processed with S@H v7, so there was no autocorrelation analysis done on it. We've still got big chunks of data that have never been processed with Astropulse to send out. We don't believe in making work for the sake of making work. 5. Will we run out of data? It depends upon what you mean by that. We may run out of SETI@home data taken by the current data recorder, although there is still plenty of Astropulse data to process. Jeff is prioritizing the GBT data splitter, so we hope to have that on line before too long. It will also be the starting point for the next thing, which will be to use SERENDIP VI as a data recorder. It should be capable of much higher data rates (GBps) than the current recorder, and therefore much higher bandwidths. It should also give us our first taste of the 327MHz Sky Survey data.
@SETIEric@qoto.org (Mastodon) |
Bernie Vine Send message Joined: 26 May 99 Posts: 9957 Credit: 103,452,613 RAC: 328 |
Thank you Eric for that! And on a Saturday too!! |
Claggy Send message Joined: 5 Jul 99 Posts: 4654 Credit: 47,537,079 RAC: 4 |
Thanks Eric. Claggy |
Grant (SSSF) Send message Joined: 19 Aug 99 Posts: 13841 Credit: 208,696,464 RAC: 304 |
Thanks for the update, greatly appreciated. Grant Darwin NT |
David S Send message Joined: 4 Oct 99 Posts: 18352 Credit: 27,761,924 RAC: 12 |
Thank you, Eric. One more question: what's happening with Beta? David Sitting on my butt while others boldly go, Waiting for a message from a small furry creature from Alpha Centauri. |
Dimly Lit Lightbulb 😀 Send message Joined: 30 Aug 08 Posts: 15399 Credit: 7,423,413 RAC: 1 |
Thanks for the update Eric :) Member of the People Encouraging Niceness In Society club. |
Angela Send message Joined: 16 Oct 07 Posts: 13131 Credit: 39,854,104 RAC: 31 |
Thank you for doing this update, Pookers. |
HAL9000 Send message Joined: 11 Sep 99 Posts: 6534 Credit: 196,805,888 RAC: 57 |
Sounds like Bruno may have a fault in the AE35 unit. :) Thanks for taking some of your other spare time, that you don't have, to let us know the status of things. It helps to clear up speculation about what may or may not being occurring behind the scenes. SETI@home classic workunits: 93,865 CPU time: 863,447 hours Join the [url=http://tinyurl.com/8y46zvu]BP6/VP6 User Group[ |
S@NL Etienne Dokkum Send message Joined: 11 Jun 99 Posts: 212 Credit: 43,822,095 RAC: 0 |
Thank you for the update ! |
Bernie Vine Send message Joined: 26 May 99 Posts: 9957 Credit: 103,452,613 RAC: 328 |
Thank you, Eric. I believe someone mentioned that Bruno ran several processes on Beta, so I would guess it will be back when Bruno is replaced. Seems fair to me that main would be restored (with still a few things that are not working)at the expense of the Beta test site. |
rob smith Send message Joined: 7 Mar 03 Posts: 22491 Credit: 416,307,556 RAC: 380 |
Thanks for the update Eric, and thanks Angela for putting up with Pookers :-) Bob Smith Member of Seti PIPPS (Pluto is a Planet Protest Society) Somewhere in the (un)known Universe? |
Mike Send message Joined: 17 Feb 01 Posts: 34362 Credit: 79,922,639 RAC: 80 |
Thank you very much Eric. With each crime and every kindness we birth our future. |
Kerry Summerfield Send message Joined: 14 Nov 01 Posts: 23 Credit: 4,314,126 RAC: 0 |
Thanks Eric, Your Server Status information is much appreciated. Cheers from New Zealand Kerry |
Darth Beaver Send message Joined: 20 Aug 99 Posts: 6728 Credit: 21,443,075 RAC: 3 |
Thanks Eric for the update . Fingers crossed you don't get any more Gremlins for a while . |
Richard Haselgrove Send message Joined: 4 Jul 99 Posts: 14676 Credit: 200,643,578 RAC: 874 |
Thanks Eric, much appreciated. 3. New Data. Finally, in the last few weeks, we've gotten some data from 2014 split and out the door. Not a lot, though. There are a few reasons why it took so long. First, the Arecibo itself and the ALFA receiver that we use for SETI@home was offline for much of 2014 (mostly January to June), so we don't have that much data. Second, because of funding, Astronomy isn't top dog at Arecibo anymore, so Astronomers get a smaller fraction of the observing time. And compounding it is that disks are bigger and we don't send a box until it's full (to save on shipping costs), so it takes longer to fill a box of disks. I've just noticed that we're splitting 26se14as - so there's some astronomy still being done! 19 'tapes' in one day (and it's the full 50.20 GB, so there's probably at least one more in the pipeline) must be close to some sort of record. |
TBar Send message Joined: 22 May 99 Posts: 5204 Credit: 840,779,836 RAC: 2,768 |
Thanks much Eric. |
Angela Send message Joined: 16 Oct 07 Posts: 13131 Credit: 39,854,104 RAC: 31 |
Thanks for the update Eric, and thanks Angela for putting up with Pookers :-) Let's see, we met in 1992 so that's 22 years and counting... |
Michael W.F. Miles Send message Joined: 24 Mar 07 Posts: 268 Credit: 34,410,870 RAC: 0 |
Tanks for the info. There is hope after all Michael |
Raistmer Send message Joined: 16 Jun 01 Posts: 6325 Credit: 106,370,077 RAC: 121 |
Is it possible or worthly to turn off gaussian, triplet and pulse finding on those tapes for re-processing that had no other issues than missing autocorr at that moment? Or smth another like chirp rate and blanking algorithm change makes all types of search worthy even on that subset of tapes? |
Cruncher-American Send message Joined: 25 Mar 02 Posts: 1513 Credit: 370,893,186 RAC: 340 |
Sounds like Bruno may have a fault in the AE35 unit. :) Well, you should know if anyone would, HAL |
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