New Data from AO

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Jeff Cobb
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Message 1609524 - Posted: 5 Dec 2014, 17:54:33 UTC
Last modified: 5 Dec 2014, 17:55:48 UTC

The four disks from AO have arrived - about 5TB of data. I have queued them up for pre-processing (radar blanking) so new SETI@Home workunits should be going out soon.
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Message 1609525 - Posted: 5 Dec 2014, 18:04:37 UTC

That´s great news, looking forward for some more SETI work!
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Message 1609526 - Posted: 5 Dec 2014, 18:05:18 UTC
Last modified: 5 Dec 2014, 18:05:51 UTC

Nice... finally dry spell coming to an end (it will be difficult leaving E@H home though with the higher RAC!)

Two queries:

1) Is there enough storage (ie drive units) with this sudden amount of work? (Money burning hole in my pocket... heh.)

2) Is there going to be any Green Bank work mixed in, now or in the near future?
“Never doubt that a small group of thoughtful, committed citizens can change the world; indeed, it's the only thing that ever has.”
--- Margaret Mead

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Message 1609530 - Posted: 5 Dec 2014, 18:32:30 UTC

The Cricket graph is showing a big spike. That might be the new data, I hope. A question I have is how long will 5 TB of data last?
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Message 1609532 - Posted: 5 Dec 2014, 18:42:45 UTC - in response to Message 1609530.  
Last modified: 5 Dec 2014, 18:43:23 UTC

5TB of data would theoretically be:

5 x 1024 x 1024 x 1024 x 1024 = 5,497,558,138,880 kilobytes
5497558138880 KB / 365 KB = 1,5061,803,120 Multibeam tasks (average 365 KB task size).

And if there were APs to split (which I doubt):
5497558138880 KB / (8 x 1024 x 1024) = 655,360 AP tasks (8 MB task size).

But there's probably some loss there. And perhaps some parts unusable.
Jord

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Message 1609534 - Posted: 5 Dec 2014, 18:46:43 UTC - in response to Message 1609524.  
Last modified: 5 Dec 2014, 18:48:25 UTC

The four disks from AO have arrived - about 5TB of data. I have queued them up for pre-processing (radar blanking) so new SETI@Home workunits should be going out soon.

That's all good and well Jeff, but how about the rebuilding of the AP database? We haven't heard a word about that since Dec 2, when Eric predicted that it could be finished on Saturday, and that he should post updates during the week (which didn't happen).

5TB of MB data, will be gone in a blink of an eye, since all participants computers are totally empty of MB work by now. Poof, and it will be swallowed up.
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Josef W. Segur
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Message 1609538 - Posted: 5 Dec 2014, 19:08:33 UTC - in response to Message 1609532.  
Last modified: 5 Dec 2014, 19:12:38 UTC

5TB of data would theoretically be:

5 x 1024 x 1024 x 1024 x 1024 = 5,497,558,138,880 kilobytes
5497558138880 KB / 365 KB = 1,5061,803,120 Multibeam tasks (average 365 KB task size).
...

5 x 1024 x 1024 x 1024 x 1024 = 5,497,558,138,880 BYTES

Multibeam tasks actually only have 256K (262144 Bytes) data, but it's encoded in a fashion similar to uue which makes it larger. Also, splitting uses about a 20% overlap between WU groups so a better estimate would be

(5497558138880 / 262144) * 1.2 = 25,165,824 Multibeam workunits.

It usually takes about 2.1 tasks on average per Multibeam workunit, so 52,848,230 tasks or so is my estimate.
                                                                  Joe
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Message 1609541 - Posted: 5 Dec 2014, 19:24:41 UTC - in response to Message 1609526.  

Nice... finally dry spell coming to an end (it will be difficult leaving E@H home though with the higher RAC!)

A very pleasant surprise which I noticed as well. Is there some online link which provides the RAC on a per project basis for comparison purposes?
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Message 1609542 - Posted: 5 Dec 2014, 19:25:29 UTC - in response to Message 1609538.  

Joy !
mambo
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Message 1609544 - Posted: 5 Dec 2014, 19:28:44 UTC - in response to Message 1609538.  

5TB of data would theoretically be:

5 x 1024 x 1024 x 1024 x 1024 = 5,497,558,138,880 kilobytes
5497558138880 KB / 365 KB = 1,5061,803,120 Multibeam tasks (average 365 KB task size).
...

5 x 1024 x 1024 x 1024 x 1024 = 5,497,558,138,880 BYTES

Multibeam tasks actually only have 256K (262144 Bytes) data, but it's encoded in a fashion similar to uue which makes it larger. Also, splitting uses about a 20% overlap between WU groups so a better estimate would be

(5497558138880 / 262144) * 1.2 = 25,165,824 Multibeam workunits.

It usually takes about 2.1 tasks on average per Multibeam workunit, so 52,848,230 tasks or so is my estimate.
                                                                  Joe

Let's say that the loose change (2.8 million MB tasks) vanishes into the 'out in the field' caches - so to an order of magnitude, 50 million tasks and we process 50 thousand an hour.

So, around a thousand hours of work - can't estimate closer than that without any knowledge of the ARs of the recordings. 6 weeks of work should keep us warm through the holidays.
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Message 1609545 - Posted: 5 Dec 2014, 19:32:18 UTC - in response to Message 1609544.  

6 weeks of work should keep us warm through the holidays

Ah, an answer I can understand. Thanx
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Message 1609559 - Posted: 5 Dec 2014, 20:28:57 UTC - in response to Message 1609534.  

That's all good and well Jeff, but how about the rebuilding of the AP database? We haven't heard a word about that since Dec 2, when Eric predicted that it could be finished on Saturday, and that he should post updates during the week (which didn't happen).


Saturday is tomorrow.........I'm not going to look gift horses or WU's in the mouth. Anything to crunch is a plus.
"Sour Grapes make a bitter Whine." " : >
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Message 1609565 - Posted: 5 Dec 2014, 20:47:41 UTC

6 weeks of work

It looks like it is already finished.
No more are available.
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Message 1609570 - Posted: 5 Dec 2014, 20:56:42 UTC - in response to Message 1609565.  

6 weeks of work

It looks like it is already finished.
No more are available.

Now how do you work that out when there are 3 files currently being split as we speak? :-O

Cheers.
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Message 1609571 - Posted: 5 Dec 2014, 21:00:28 UTC
Last modified: 5 Dec 2014, 21:00:55 UTC

Yay! At last the wheels are moving again!
http://setistats.haveland.com/
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Message 1609572 - Posted: 5 Dec 2014, 21:04:53 UTC - in response to Message 1609538.  
Last modified: 5 Dec 2014, 21:05:34 UTC

5 x 1024 x 1024 x 1024 x 1024 = 5,497,558,138,880 BYTES

lol, did I go one too many? Ah yes. ;-)
So divide by 1024...
Jord

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Message 1609584 - Posted: 5 Dec 2014, 21:32:09 UTC

Wow, great news !
Even though I run another project, my preference and loyalty has always been for Seti.
Thank you for the team of Seti for their efforts.

On ne peut voir au-delà des choix qu'on ne comprend pas.
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Message 1609592 - Posted: 5 Dec 2014, 21:46:48 UTC

Thanks, 200 MB tasks in progress as we speak here :D

that's a great Sinterklaas(Dutch traditional holiday where gifts are given to children by a Santa Claus kind of folk hero) present !
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Message 1609603 - Posted: 5 Dec 2014, 22:18:50 UTC

Woohoo, more work to process!
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Message 1609626 - Posted: 5 Dec 2014, 23:56:01 UTC

Well, I see on the server status page there's no backlog of WU's to send, no matter how often I update the page. All of my computers except one have SETI WUs now. Of course, the one that doesn't is my best one with 2 6-core NUMA processors. So I've got 24 virtual processors sitting idle if it wasn't for the Bitcoin fundraiser. I just manually grab a load of bitcoin, process it, check SETI and if no tasks there, grab another load of BTC WUs. Hopefully, I'll get lucky before bedtime and grab enough SETI WUs to work through the night.
My goal for the year is 20M credits, and I'm soooooooooo close. So I want this particular machine working SETI. I figure once I reach that 20M goal, then I'll let all of my computer work the BTC WUs until the end of the campaign.
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Message boards : News : New Data from AO


 
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