Olga (Apr 02 2009)


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Profile Matt Lebofsky
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Message 881812 - Posted: 2 Apr 2009, 22:44:31 UTC

The science database issues slowly get better. The root drives are now all sync'ed up, but as I mentioned before this is only a temporary condition. This will fail again upon next bootup. That's fine because this forces the issue of reformatting the data RAIDs on the system which is something I've been wanting to do for a year now - might as well reformat the whole system, root, data, and all. The pulse table continues to get populated and assimilators remain off - at least for another day. We're about to run out of workunit disk storage (again) so expect another workunit shortage period in the very near future. My new rough estimate for the pulse load to finish is sometime tomorrow, and then we can turn the assimilators on, and we will be as back to normal (whatever that means).

One of the download servers (bane) has been having mounting issues the past few days, hence the locking-up of the server status page. I just rebooted the thing. Let's see if that holds.

Once again today was mostly a coding day. I've been annoyed by the radar blanking stuff, being as how the design has changed underneath me thus rendering a week (or two) of my effort moot. The old understanding was that we should only being seeing one type of radar at a time, but my output was showing this to be far from the case. Nevertheless once I got a quick handle on the fftw routines I made quick work of the correlation code and am already spotting radar quicker and more effectively. However a lot of graphing/threshold tweaking is in order before I can really start locking on and blanking.

- Matt

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Profile Gary Charpentier
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Message 881817 - Posted: 2 Apr 2009, 23:19:35 UTC - in response to Message 881812.

Thanks for the updates. It is always appreciated.


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Message 881818 - Posted: 2 Apr 2009, 23:20:38 UTC - in response to Message 881812.
Last modified: 2 Apr 2009, 23:22:54 UTC

... already spotting radar quicker and more effectively. ...

What?! Your human eye+brain is faster that the Fast Fourier Transform?!!

Hang in there!


One pause for thought... Considering the mess that the radars are having on the s@h and Astropulse data... What of the other astronomical studies?


Is the signal correlation between the channels good enough to do mere common mode rejection to eliminate the radar (and any other common mode signals)?

Regards,
Martin
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Profile Matt Lebofsky
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Message 881823 - Posted: 2 Apr 2009, 23:35:46 UTC - in response to Message 881818.

... already spotting radar quicker and more effectively. ...

What?! Your human eye+brain is faster that the Fast Fourier Transform?!!


You know what I mean.. the new program is spotting radar quicker than the old one. Though still you can look at some of a graph of the data and see radar instantaneously.

Considering the mess that the radars are having on the s@h and Astropulse data... What of the other astronomical studies?


Because of the kind of data analysis other projects do, the radar is lost in the noise. It's a nightmare for us because it ends up looking like pulses.

However, some projects are similarly affected and request that when they observe a high pass filter is turned on which completely obliterates the radar (which is actually broadcasting around 1300MHz, but is still loud enough to jam our receivers up at 1420MHz). Unfortunately this high pass filter is only on about 10% of the time, roughly - but when it is our data look super clean.

Is the signal correlation between the channels good enough to do mere common mode rejection to eliminate the radar (and any other common mode signals)?


It is when the radar is blasting us (every 12 seconds) but from what I understand the echoes are weak enough to look like noise (but still show up as pulses). I may be wrong. Ask Eric or Dan.

- Matt

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Message 881844 - Posted: 3 Apr 2009, 0:36:59 UTC - in response to Message 881812.

Thanks for the update, have set up my cache accordingly :) a few extra days more ;)

let's see if the next three threads will be named:
Tatiana, Maria and Anastasia :)

so thus far the monthly thread naming theme is either
"The Romanovs" or "Russian Grand Dukes and Duchesses"
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Message 881857 - Posted: 3 Apr 2009, 2:03:58 UTC

So, russian royalty this month?

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Message 881893 - Posted: 3 Apr 2009, 4:59:28 UTC - in response to Message 881857.

Ah the power of Google, only another 27 days to go until Matt reveals the thread titles for this month :-)

Good job to all of you at Berkeley for working through your ongoing hardships, you guys really should be given some sort of award for keeping this project running with limited resources.
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Message 881938 - Posted: 3 Apr 2009, 11:08:39 UTC

I presume the "southern seti" doesn't suffer from these radar issues. Wouldn't the data from there be cleaner, not to mention other parts of the sky not being observed from Areciebo?

Thanks for the updates and keeping the project up under such trying conditions.

Cheers,
MarkJ

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Message 881949 - Posted: 3 Apr 2009, 12:25:55 UTC
Last modified: 3 Apr 2009, 12:27:18 UTC

Some times I feel for you Matt. All the things you have to deal with makes my computer problems seem very trivial. Not knowing exactly where a problem is, has to be the most agravating thing in the world!

I think your doing a great Job and have never seen any loss of control on your part :)

If the WUs go away.. so beit. I will survive and so will everyone else. A full format sounds like an excellent idea. A surface scan is not a bad idea either but would take.. WOW.. who knows!!?? Its ok.. I'll wait :)

Get on keeping on!

-- Mike
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Message 882001 - Posted: 3 Apr 2009, 15:46:33 UTC - in response to Message 881818.

... already spotting radar quicker and more effectively. ...

What?! Your human eye+brain is faster that the Fast Fourier Transform?!!

...


Wouldn't surprise me. The brain seems to be quite optimized for that pattern recognition stuff - optical and acoustical.

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Message 882004 - Posted: 3 Apr 2009, 16:08:41 UTC - in response to Message 881893.

Ah the power of Google, only another 27 days to go until Matt reveals the thread titles for this month :-)

Good job to all of you at Berkeley for working through your ongoing hardships, you guys really should be given some sort of award for keeping this project running with limited resources.

AMEN to that! Perhaps we should paraphrase Winston Churchill's comments about the Battle of Britain - never before have so many owed so much to so few. And I might add - with so few resources.

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Message 882011 - Posted: 3 Apr 2009, 17:09:13 UTC - in response to Message 881844.
Last modified: 3 Apr 2009, 17:10:12 UTC

Thanks for the update, have set up my cache accordingly :) a few extra days more ;)

let's see if the next three threads will be named:
Tatiana, Maria and Anastasia :)

so thus far the monthly thread naming theme is either
"The Romanovs" or "Russian Grand Dukes and Duchesses"


my guess, from the limited data so far: the cast of War & Peace
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Message 882079 - Posted: 3 Apr 2009, 21:02:02 UTC - in response to Message 881857.
Last modified: 3 Apr 2009, 21:02:47 UTC

So, russian royalty this month?

Olga......?

Maybe it's past girlfriends........LOL...even a geeky has a gf or two.......


Any twins?
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Message 882093 - Posted: 3 Apr 2009, 21:52:01 UTC - in response to Message 882079.

So, russian royalty this month?

Olga......?

Maybe it's past girlfriends........LOL...even a geeky has a gf or two.......


Any twins?



Then again, he's thrown us off the scent early before :)

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Message 882175 - Posted: 4 Apr 2009, 4:27:10 UTC

the sah_assimilators are running, Workunits waiting for assimilation 2,331,964 at time of post... see it the queue decreases...
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Message 882204 - Posted: 4 Apr 2009, 8:23:05 UTC - in response to Message 882175.

the sah_assimilators are running, Workunits waiting for assimilation 2,331,964 at time of post... see it the queue decreases...


Slowly but decreases :)


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Message 882205 - Posted: 4 Apr 2009, 8:25:00 UTC - in response to Message 882204.

Assimilator queue seems to be dropping by about 20k workunits per hour.
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Message 882237 - Posted: 4 Apr 2009, 12:42:54 UTC

4/4/2009 8:22:44 AM|SETI@home|Computation for task 09fe09aa.16820.11115.6.8.63_1 finished
4/4/2009 8:22:44 AM|SETI@home|Output file 09fe09aa.16820.11115.6.8.63_1_0 for task 09fe09aa.16820.11115.6.8.63_1 absent

I have been getting this for nearly a day now and even though there is work available, none is getting through.

Any suggestions as to why this message is coming up?
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Message 882241 - Posted: 4 Apr 2009, 13:13:14 UTC - in response to Message 882237.

4/4/2009 8:22:44 AM|SETI@home|Computation for task 09fe09aa.16820.11115.6.8.63_1 finished
4/4/2009 8:22:44 AM|SETI@home|Output file 09fe09aa.16820.11115.6.8.63_1_0 for task 09fe09aa.16820.11115.6.8.63_1 absent

I have been getting this for nearly a day now and even though there is work available, none is getting through.

Any suggestions as to why this message is coming up?

Because your task ended with an error. If there's an error, then no scientific work is completed, and there's no output file to upload.

Have a look at the task details for 09fe09aa.16820.11115.6.8.63_1. The error message is "No main program specified". Post that in Q & A or Number Crunching, and we can help you there. (My guess is that Claggy's Space has crept into your app_info.xml file).

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Message 882340 - Posted: 4 Apr 2009, 19:36:59 UTC

The graph froze at 1600 UTC. Another process damming up the processes? Server Status page processes? Science Status page processes?
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