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Message 2030316 - Posted: 1 Feb 2020, 15:24:04 UTC - in response to Message 2030287.  

My most productive machine (and likely most power hungry) has about two hundred WUs in transfers, 'Download pending' and no work for the last 18 hours.
Are there likely to be some sent or should I just shut this one down until Wednesday?
Thanks!
Just looked at my #2 machine, and it too has a few hundred in 'Download pending" state and running only GPU, WUs

Edit
Noticed #1 PC did download but mostly GUPPI WUs
Those all ran in a couple minutes with half my CPU working the sole 8 remaining AstroPulse and 'normal' WUs.
Also got and a bunch of GPUs to crunch.
The GUPPI units have issues I gather?


Blew through all the downloads except the remaining two Astropulses on #1
#2 is in the same boat.
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Message 2030320 - Posted: 1 Feb 2020, 15:31:05 UTC - in response to Message 2030310.  
Last modified: 1 Feb 2020, 16:18:24 UTC

I've only been a member since the 10th of January, so I have to ask, are these maintenance shutdowns and work slow downs a regular weekly occurrence? It seems just as I settle into a routine, everything gets screwed up.


The maintenance shutdowns prior to this problem lasted only a few hours; the last two have lasted a day or more. It takes close to the same amount of time for things to stabilize after a shutdown as it lasted as the longer it's down, the more short of work the participants' computers get.

The recent issues which have been for two weeks of long outages and no work are an anomaly. They seem to be caused by a backlog of the servers not processing returned work so it accumulates. The hope is that eventually the SETI@Home team is going to run a script or equivalent to clear the logjam and let things get back to normal.

Edit: To add some details to this, this is from the last look at Computing > Server status:

Results out in the field = 3,932,277
Results returned and awaiting validation = 12,302,507
Results waiting for db purging = 5,075,815


The total of these three is 21,310,599, which is too large. Dr. Korpela has noted that the functional limit of the active result table is 20M. After this it may no longer fit into memory (which is maxed out) on the machine it's running on. Probably at this point virtual memory will start paging it to disk which is extremely slow, hundreds or thousands of times slower than memory's bandwidth, so everything grinds to a halt. Thus the splitters are disabled from generating more work until this total falls lower than 20M.

However this is a band-aid. It is not falling nearly as fast nor as low as it should, thus the need to run a process to get the validation and purging done (the latter should be very close to zero.) That process/script may not even exist yet requiring someone (inevitably already-overloaded project director Dr. Korpela) to develop it.

Hope this explains things a little. :^)
“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 2030331 - Posted: 1 Feb 2020, 16:37:54 UTC - in response to Message 2028771.  
Last modified: 1 Feb 2020, 16:38:17 UTC

@Lynn,
Did you read the notices? The project was down for maintenance to, in the long run, improve performance. I know that credit is important to some, I also take pride in trying to be at the top of my group, but what is more important is the work itself. Finding proof of intelligent life could change the world, hopefully for the better, and you have to look at the bigger picture.
Best Regards.


Exactly what I think.
+1
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Message 2030336 - Posted: 1 Feb 2020, 17:03:25 UTC - in response to Message 2030310.  

This happens all the time :(
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Message 2030348 - Posted: 1 Feb 2020, 18:28:07 UTC - in response to Message 2030320.  

Thanks for the deeper explanation.
But what are the GUPPI WUs?
They run in only a few seconds
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Message 2030355 - Posted: 1 Feb 2020, 18:51:02 UTC - in response to Message 2030348.  

Thanks for the deeper explanation.
But what are the GUPPI WUs?
They run in only a few seconds
Not all of them. The current batch (BLC35) has a lot of bad data.
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Message 2030368 - Posted: 1 Feb 2020, 19:43:32 UTC

I hope that this can be resolved soon. I am eager for my next SETI task to start :-)
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Message 2030452 - Posted: 2 Feb 2020, 2:55:19 UTC

Understand the explanation and rationale given by "Mr Kevvy." - Thanks!

However, has there been published an estimate as to how long the work unit outage may last?
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Message 2030461 - Posted: 2 Feb 2020, 3:56:07 UTC - in response to Message 2030355.  

Thanks for the deeper explanation.
But what are the GUPPI WUs?
They run in only a few seconds
Not all of them. The current batch (BLC35) has a lot of bad data.


Thanks!
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Message 2030516 - Posted: 2 Feb 2020, 13:47:59 UTC - in response to Message 2030355.  

...The current batch (BLC35) has a lot of bad data.

I kind of expected that was the case. I had a 'bunch' all at one time.
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Message 2030528 - Posted: 2 Feb 2020, 15:06:03 UTC - in response to Message 2030452.  

Understand the explanation and rationale given by "Mr Kevvy." - Thanks!

However, has there been published an estimate as to how long the work unit outage may last?


You're welcome. :^) The work outage is (temporarily?) over as the results are below 20M with most of the purging done. Let's see how long this lasts...
“Never doubt that a small group of thoughtful, committed citizens can change the world; indeed, it's the only thing that ever has.”
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Message 2030732 - Posted: 4 Feb 2020, 0:41:10 UTC

I am glad it is back working again. Just wanted to know what happened to the full scanning graphic on my screen saver. I miss that as my working background? I see that the operation is working OK.

Dick
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Message 2031047 - Posted: 6 Feb 2020, 17:56:45 UTC
Last modified: 6 Feb 2020, 17:57:16 UTC

i see lots of work
We are Wanderers of an never ending universe!
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Message 2031957 - Posted: 11 Feb 2020, 10:44:48 UTC

Maybe you found a signal and just need all the parts to it but they are out in the field. ;)
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Message 2031992 - Posted: 11 Feb 2020, 23:42:51 UTC

My point of view is that it is ok to be proud of accomplishment when a certain number of work was done. But we should not loose out of our focus that the data are best possible correct that are sent out to us, so that there would be only a minority of bad data. To reach this, it is essential to do some necessary adjustments on the side of the servers where we are getting our data from. This has a "temporary" impact on the amount of distributed workunits as expected. We should not be ignorant of the technical challenges on the server side, but rather see the bigger picture. Ignorance about anything is just the lack of knowledge.
As far as I was able to follow the conversations in the boards I more and more I see that the staff is working really hard, to get this server environment running exceptionally stable, far out of this n what we can imagine,
Despite the fact of not being English nativ, so I do hope that my message was clear and well- understandable.

Kind regards,
Peter
There are 2 things eternal, the universe and the human stupidity. When it comes to the universe, I'm not so sure.
Albert Einstein
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Message 2033043 - Posted: 19 Feb 2020, 16:49:23 UTC - in response to Message 2029036.  

Me to no work and just get communication deferred
Bob Swift
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