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 Post subject: SETI @home Updates
PostPosted: Thu May 17, 2007 6:15 am 
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Let's try to keep each other up to date on the current events!

I will defer to a more knowledgeable poster, Mr Eric Korpela.
Quote:

This one could probably go in the techincal news, but since I haven't blogged in a while, I decided to jot it down here.

Following the large outage, bruno's been having some problems keeping up. Lots of dropped connections. I guess most of you noticed that. It's not a lack of hardware this time, just an over-abundance of connection attempts.

Some of the dropped connections were local file-server connections, which causes some of the http processes to wait around which causes more dropped connections. Changing some of the TCP tuning parameters helped, but didn't solve the problem.

We did some brain storming before the outage and have come up with some tactics to combat these issues.

We're setting up our router to proxy the SYN/ACK handshakes. That way if we are flooded, the connections will be dropped before they get to bruno. That'll in turn prevent the NFS connections from getting dropped.

We're also getting rid of some configuration remnants from earlier BOINC server code. Currently bruno handles all of the incoming connections and forwards them to other machines when appropriate for uploads and downloads. We can designate other machines as upload or download handlers so that bruno won't have to touch those connections at all.

If that's not enough, we'll set up web servers on some of the other machines and get back to round robin DNS for the upload and download servers.

Well, that's enough typing for now. This weekend, one of my fingers had an unfortunate meeting with the leading edge of a 120mm fan blade inside a server case. Fortunately the fan blade broke and it doesn't look like I'll lose the fingernail. I've learned my lesson, always approach case fans from the trailing edge.

--
Eric


Here is the original thread.

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 Post subject:
PostPosted: Wed Oct 24, 2007 4:19 am 
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Here are some links to the Tech and Staff Blog forums at SETI.
There's always something ... uummmm..... UPDATED! lol


http://setiathome.berkeley.edu/forum_forum.php?id=21 <-- TECH NEWS
http://setiathome.berkeley.edu/forum_forum.php?id=20 <-- STAFF BLOG

Sorry, I shouldn't laugh. I should be posting in here more often.

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 Post subject:
PostPosted: Wed Oct 24, 2007 4:33 am 
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OH! One more SETI@home update.
I was nominated and then I accepted a moderators title at their forums. I'll try to represent us well.

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PostPosted: Wed Oct 24, 2007 5:30 am 
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Pawly wrote:
OH! One more SETI@home update.
I was nominated and then I accepted a moderators title at their forums. I'll try to represent us well.
Youd better, else well have to dip you in maple syrup and cover you up in canadian goose feather before parading you down the Trans-Canada Highway... :twisted:

Congrats :clap:

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PostPosted: Wed Oct 24, 2007 6:03 am 
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Pawly wrote:
OH! One more SETI@home update.
I was nominated and then I accepted a moderators title at their forums. I'll try to represent us well.

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oh ya you did it :bravo: :bravo: :bravo: :haha: :cheers: :cheers: :bounce: :wow: :clap: :clap: :woohoo2: :hornsup: :monkey: :woohoo: :woohoo: :aww: :rockon: :hi5: :hi5: :yay: :comp3: : :pat: :nod: :nod:

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 Post subject:
PostPosted: Wed Oct 24, 2007 6:18 am 
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Hey Hey thanks but let's not get carried away! lol

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 Post subject:
PostPosted: Wed Oct 24, 2007 6:35 am 
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Pawly wrote:
OH! One more SETI@home update.
I was nominated and then I accepted a moderators title at their forums. I'll try to represent us well.


Congrats Pawly!

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PostPosted: Wed Oct 24, 2007 11:29 am 
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Thats great news Pawly!!

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PostPosted: Wed Oct 24, 2007 12:40 pm 
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[quote="Pawly"]OH! One more SETI@home update.
I was nominated and then I accepted a moderators title at their forums. I'll try to represent us well.

:thumbsup: :bravo: My friend. I know you'll do well.

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Last edited by JPLiz on Wed Oct 24, 2007 9:25 pm, edited 1 time in total.

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 Post subject:
PostPosted: Wed Oct 24, 2007 6:32 pm 
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Who is getting caried away?? :roll:

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PostPosted: Tue Nov 27, 2007 4:38 am 
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From the Front Page at SETI
Quote:
November 26, 2007
Outage alert: We are shutting down the entire project at 15:00 PST on Thursday, November 29th for lab-wide electrical repairs. This may take all night - we will try to bring everything back up the following morning as early as possible.

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 Post subject:
PostPosted: Sun Jan 06, 2008 8:05 am 
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http://www.berkeley.edu/news/media/rele ... home.shtml

SETI@home looking for more volunteers

By Robert Sanders, Media Relations | 02 January 2008

BERKELEY
– The longest-running search for radio signals from alien civilizations is getting a burst of new data from an upgraded Arecibo telescope, which means the SETI@home project needs more desktop computers to help crunch the data.

Since SETI@home launched eight years ago, the project based at the University of California, Berkeley's Space Sciences Laboratory has signed up more than 5 million interested volunteers and boasts the largest community of dedicated users of any Internet computing project: 170,000 devotees on 320,000 computers.

Yet, new and more sensitive receivers on the world's largest radio telescope in Arecibo, Puerto Rico, and better frequency coverage are generating 500 times more data for the project than before. The SETI@home software has been upgraded to deal with this new data as the search for extraterrestrial intelligence (SETI) enters a new era and offers a new opportunity for those who want to help find other civilizations in the universe.

"The next generation SETI@home is 500 times more powerful then anything anyone has done before," said project chief scientist Dan Werthimer. "That means we are 500 times more likely to find ET than with the original SETI@home."

According to project scientist Eric Korpela, the new data amounts to 300 gigabytes per day, or 100 terabytes (100,000 gigabytes) per year, about the amount of data stored in the U.S. Library of Congress. "That's why we need all the volunteers," he said. "Everyone has a chance to be part of the largest public participation science project in history."

The 1,000-foot diameter Arecibo dish, which fills a valley in Puerto Rico, is part of the National Astronomy and Ionosphere Center operated by Cornell University with funds from the National Science Foundation. Since 1992, Werthimer and his team have piggybacked on radio astronomy observations at Arecibo to record signals from space and analyze them for patterns that could indicate they were transmitted by an intelligent civilization.

When the team's incoming data overwhelmed its ability to analyze it, the scientists conceived a distributed computing project to harness many computers into one big supercomputer to do the analysis. Since SETI@home was launched, other distributed computing projects have arisen, from folding@home to predict the three-dimensional tangle of a protein to the newly-launched cosmology@home to model possible universes. Most are now on a platform called BOINC (Berkeley Open Infrastructure for Network Computing), which was developed by SETI@home's director David Anderson so that the various projects could share resources.

"There are now 42 projects on BOINC, and, until now, there has been enough computing power to go around," Werthimer said.

What triggered the new flow of data was the addition of seven new receivers at Arecibo, which now allow the telescope to record radio signals from seven regions of the sky simultaneously instead of just one. With greater sensitivity and the ability to detect the polarization of the radio signals, plus 40 times more frequency coverage, Arecibo is set to survey the sky for new radio sources.

These improvements also prime the telescope for an improved search for intelligent signals from space.

"The multiple receivers help us weed out interference better and make us less susceptible to thinking that things terrestrial are extraterrestrial,"
Werthimer said.

Werthimer noted that, despite the fact that UC Berkeley has been analyzing radio signals from space since 1978 on various telescopes, no telltale signals from an intelligent civilization have yet been found.

"Earthlings are just getting started looking at the frequencies in the sky; we're looking only at the cosmically brightest sources, hoping we are scanning the right radio channels," he said. "The good news is, we're entering an era when we will be able to scan billions of channels. Arecibo is now optimized for this kind of search, so if there are signals out there, we or our volunteers will find them."

SETI@home has been funded by various organizations over the years, including the Planetary Society and Sun Microsystems, and continues to be supported by individual donations from its volunteers.

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 Post subject: Re: SETI @home Updates
PostPosted: Tue Mar 16, 2010 6:37 am 
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Wow!!!

Possible that Seti could be down for some considerable time.......

Seti News Thread

Possible Answers

Bang goes my target of reaching 1 mill.....

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 Post subject: Re: SETI @home Updates
PostPosted: Sat Mar 19, 2011 4:37 am 
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:lol: :lol: ROTFLMAO@Werechild :lol: :lol:
Congrats Pawley - I know you will do us Kanucks proud

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