Panic Mode On (45) Server problems

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Profile arkayn
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Message 1080869 - Posted: 24 Feb 2011, 6:09:18 UTC

Begin.

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Message 1080881 - Posted: 24 Feb 2011, 6:37:03 UTC

Only 4 cans of beer in the regurgitator. ooops... wrong panic.
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Message 1080886 - Posted: 24 Feb 2011, 6:59:30 UTC - in response to Message 1080881.  

I'm sorry but no panic is happening here.

Cheers.
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Message 1080887 - Posted: 24 Feb 2011, 7:08:04 UTC - in response to Message 1080869.  


Unfortunately only 2 of the 5 MB splitters are running, so work will continue to be scarce for a while.
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Message 1080899 - Posted: 24 Feb 2011, 8:20:12 UTC - in response to Message 1080869.  


Uh oh!
Network traffic is now non-existant. No uploads, no downloads. Barely a trickle in either direction.
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Message 1080901 - Posted: 24 Feb 2011, 8:33:28 UTC - in response to Message 1080899.  

It's back up now, must have just been a hiccup. I had 20-30 pending uploads that had me worried, but a single hit on the RETRY had them moving :)
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Message 1080906 - Posted: 24 Feb 2011, 9:03:02 UTC - in response to Message 1080901.  

It's back up now, must have just been a hiccup.

Just noticed that.
I suspect it won't be back to full strength till people come in tomorrow & give it a kick in person.
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Message 1081001 - Posted: 24 Feb 2011, 20:03:06 UTC - in response to Message 1080999.  

Well, it seems to be a shortage of new workunits. Maybe we've scraped the bottom of the barrel, and they need to wait for new work coming from Arecibo. However I doubt that, there should be tons of uncrunched WU's in storage, just ready to feed the splitters with.


Should be I would think also, however you have to free up room before you can move more, maybe that's what's going on. Either that or they disabled on purpose until the can get the some ~4million returns validated? Guess we will see in the coming days.
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Message 1081269 - Posted: 25 Feb 2011, 18:53:34 UTC

It takes time to run the software blanking on the tapes before they can be loaded for splitting. Before Synergy was called into duty, blanking and feeding the splitters was its burn-in duty.

I don't know what handles blanking and splitter feeding now, but I do remember hearing in at least one of Matt's posts that Bob is nudging that process along one tape at a time.
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Message 1081273 - Posted: 25 Feb 2011, 19:12:59 UTC - in response to Message 1081269.  

It takes time to run the software blanking on the tapes before they can be loaded for splitting. Before Synergy was called into duty, blanking and feeding the splitters was its burn-in duty.

I don't know what handles blanking and splitter feeding now, but I do remember hearing in at least one of Matt's posts that Bob is nudging that process along one tape at a time.


How much horsepower does that take. Maybe we could work on getting a dedicated NEW machine to do it. It would be a nice/little/cheaper project.
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Message 1081302 - Posted: 25 Feb 2011, 20:38:22 UTC - in response to Message 1081273.  

It takes time to run the software blanking on the tapes before they can be loaded for splitting. Before Synergy was called into duty, blanking and feeding the splitters was its burn-in duty.

I don't know what handles blanking and splitter feeding now, but I do remember hearing in at least one of Matt's posts that Bob is nudging that process along one tape at a time.


How much horsepower does that take. Maybe we could work on getting a dedicated NEW machine to do it. It would be a nice/little/cheaper project.

No idea. I think it was Maul that was doing it before, and now Synergy seems to be handling it the same or better performance than Maul did.
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Message 1081519 - Posted: 26 Feb 2011, 4:25:28 UTC


A couple of splitters appear to have taken themselves out of action.
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Message 1081539 - Posted: 26 Feb 2011, 4:52:08 UTC - in response to Message 1081519.  


A couple of splitters appear to have taken themselves out of action.

Still around 200k ready to send, so I don't think that's a problem unless it continues to drop.
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Message 1081584 - Posted: 26 Feb 2011, 8:25:10 UTC - in response to Message 1081273.  

It takes time to run the software blanking on the tapes before they can be loaded for splitting. Before Synergy was called into duty, blanking and feeding the splitters was its burn-in duty.

I don't know what handles blanking and splitter feeding now, but I do remember hearing in at least one of Matt's posts that Bob is nudging that process along one tape at a time.


How much horsepower does that take. Maybe we could work on getting a dedicated NEW machine to do it. It would be a nice/little/cheaper project.


I would imagine that the more power you can dedicate to it the better it would be. However it's also one of those tasks that doesn't appear to need to run constantly on a dedicated box since we aren't always short of WU's I suppose. If you do have one running none stop blanking them out then you start running into storage considerations. Delicate balancing act for sure, but if people were willing I'm sure they would find and put to good use a new server ;).

What is Synergy doing now? I know what ntpckr does(in laymans terms) but what is rfi?
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Message 1081586 - Posted: 26 Feb 2011, 8:36:32 UTC - in response to Message 1081584.  


RFI= Radio Frequency Interference.
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Message 1081592 - Posted: 26 Feb 2011, 9:01:21 UTC - in response to Message 1081586.  


RFI= Radio Frequency Interference.


Thank you! Was wondering exactly what that meant, so basically Synergy is prepping up everything to be split?
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Message 1081598 - Posted: 26 Feb 2011, 9:35:29 UTC

Gee. I thought it meant Ready for Inything.......

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Message 1081728 - Posted: 26 Feb 2011, 19:32:29 UTC - in response to Message 1081592.  


RFI= Radio Frequency Interference.


Thank you! Was wondering exactly what that meant, so basically Synergy is prepping up everything to be split?

Yes, that is what Synergy is doing right now. Not only ntpckr, but doing the blanking on the tapes so they can be split.
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Message 1081759 - Posted: 26 Feb 2011, 21:20:19 UTC - in response to Message 1081728.  


RFI= Radio Frequency Interference.


Thank you! Was wondering exactly what that meant, so basically Synergy is prepping up everything to be split?

Yes, that is what Synergy is doing right now. Not only ntpckr, but doing the blanking on the tapes so they can be split.

That may be so, but the status page rfi1, 2, 3 and 4 processes correspond to source code to do RFI removal on the NTPCkr metacandidates. Refer to Eric's CANDIDATE IDENTIFICATION AND INTERFERENCE REMOVAL IN SETI@HOME paper, specifically sections 3.2, 3.3, and 3.4.

Incidentally, the blanking of the "tape" files is done in two parts. The "software blanking" analysis adds or replaces the track which indicates what parts of the data needs blanking, the splitters do the actual replacement of those parts with shaped noise.
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Message 1081940 - Posted: 27 Feb 2011, 7:41:33 UTC

Ah. I must have mis-interpreted what the process listings on the server page were then. I remember Matt said Synergy was getting a burn in by doing the software blanking, and rfi1-4 showed up on the status page around the same time, so I put those two things together.

2+2 doesn't always equal 4. :p
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Message boards : Number crunching : Panic Mode On (45) Server problems


 
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