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AndreyOR

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Message 72768 - Posted: 13 Apr 2022, 21:24:00 UTC

This is just my thinking but I do believe that more people processing N-Body would help. I'm pretty sure that the task generator is off so no new tasks are being generated. This may also mean that the wingman tasks are also NOT being generated. Even if they are and are being sent to the back of the queue as many think, the total tasks ready to send would be expected to remain about the same which it seems to be. Things will only start getting better when we start getting to the portion of the queue that has the wingman tasks. Unfortunately the amount of people processing N-Body seems to be declining which is the opposite of what we need.

The good thing about N-Body as opposed to Separation (at least the GPU version), is that there doesn't seem to be any issues getting consistent supply of tasks. I'd ask all users to temporarily turn all or at least a good chunk of their CPU resources towards N-Body so we can get through this queue. Afterwards we can switch back to our preferred resource share for various projects and task types.
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ProfileWrend
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Message 72769 - Posted: 13 Apr 2022, 21:39:26 UTC - in response to Message 72768.  

If there's some conciseness that this'd help, I'm fine with giving it a go after my queue of Einstein WUs run dry. I have it set to no new WUs now, but it might take a a few days.
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Profilemikey
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Message 72776 - Posted: 14 Apr 2022, 11:14:58 UTC - in response to Message 72765.  

Thanks very much for your explanation Alanb. Really helpful, the thing that is confusing me is that all my second tasks although they have a number are shown as unsent, in reality the data base must be just getting full of tasks going nowhere.


I would guess that alot of people have gone elsewhere to crunch with all the problems here lately, that leads to the numbers not going up or down very much as the people staying need a 2nd task and then the Server is always making new tasks as well. I think the usual cache size is 1.5 times the daily number of tasks going in and out, 13.8 million is ALOT of tasks though. I wonder if the 13.8 million number is just the number of tasks from the latest batches of tasks MW made and not related to the daily in and out numbers.
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Septimus

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Message 72780 - Posted: 14 Apr 2022, 13:14:30 UTC - in response to Message 72776.  

I think it would be helpful to know how big the Validation Inconclusive count is with a split between Simulation and Separation. Currently Separation WU’s are being cleared the same day and possibly the same hour.
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.clair.

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Message 72797 - Posted: 14 Apr 2022, 19:48:58 UTC - in response to Message 72768.  

snip
Unfortunately the amount of people processing N-Body seems to be declining which is the opposite of what we need.

On the server status page in the "Tasks by application" section , for the n-body tasks it states "Users in last 24 hours" of only 138 ,
Am I reading it wrong ?
is their realy only 138 crunchers doing n-body ? {however many computers they have got}
If so , no wunder it is taking so long to reduce the que , even with the reduction that haz been done today .
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Robert Coplin

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Message 72804 - Posted: 15 Apr 2022, 1:10:13 UTC - in response to Message 72797.  

I am still doing N-Body work units and i have a total of 4 computers but will be stopping when World Community Grid starts back up
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Septimus

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Message 72811 - Posted: 15 Apr 2022, 6:17:16 UTC - in response to Message 72804.  
Last modified: 15 Apr 2022, 6:42:22 UTC

I am slightly confused with the whole Nbody situation, as I see it nothing is getting validated so all we could well be doing is expanding a very long queue of jobs that are of no use to the science if they are not validated and no use to us in terms of credits. We need some clarification that an awful lot of computer time is not going to be wasted.
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GolfSierra

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Message 72813 - Posted: 15 Apr 2022, 6:56:29 UTC - in response to Message 72804.  

I am still doing N-Body work units and i have a total of 4 computers but will be stopping when World Community Grid starts back up

+1
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AndreyOR

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Message 72815 - Posted: 15 Apr 2022, 7:43:26 UTC

And that number of users is down to 110. It was over 700 a week ago. Christmas time, like some have joked, is looking more like a real possibility. Tom has been trying to do something about this on the server side but has not be successful.

There is no evidence that anything is wrong with the tasks themselves so I wouldn't say processing them is a waste of resources. Work generator is off so the only tasks that get generated are wingman tasks, 1 for 1, so queue is expected to stay at about the same level until we get to the portion where the wingman tasks are. It's going to take a very long time to get all the tasks done and validated. That is unless we can get a lot of users to help out and/or Tom can find a solution on the server side.
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San-Fernando-Valley

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Message 72818 - Posted: 15 Apr 2022, 8:23:48 UTC - in response to Message 72815.  

... Work generator is off so the only tasks that get generated are wingman tasks ...

Maybe I'm missing something here?
Tried CPU N-Body tasks, got hundreds of them, but all _0 tasks.
Aborted them.
Any ideas?
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Septimus

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Message 72820 - Posted: 15 Apr 2022, 8:35:24 UTC

A last ditch solution/suggestion is that Tom puts out an appeal for every user to process 2000 Nbody WU's. On average there are 6,000 users on most days so if they each do 2,000 that should knock a hole or things (or not). I have started doing them again in a vain attempt to help. Depending on how many CPU's you throw at it and how long you leave them running I reckon about 2 weeks to do 2,000.
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San-Fernando-Valley

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Message 72822 - Posted: 15 Apr 2022, 8:54:23 UTC - in response to Message 72820.  

A last ditch solution/suggestion is that Tom puts out an appeal for every user to process 2000 Nbody WU's. On average there are 6,000 users on most days so if they each do 2,000 that should knock a hole or things (or not). I have started doing them again in a vain attempt to help. Depending on how many CPU's you throw at it and how long you leave them running I reckon about 2 weeks to do 2,000.

Probably wishfull thinking.
In the last couple of days there were around 100 (!) active users/crunchers.
Of what timespan are you thinking of, for doing 2000 N-Body tasks?
There are over 13million tasks to be processed.
How many tasks can be crunched on an average day?
Just wondering ...
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Septimus

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Message 72823 - Posted: 15 Apr 2022, 9:04:44 UTC - in response to Message 72822.  
Last modified: 15 Apr 2022, 9:05:52 UTC

I was looking at all users across BOTH projects not just NBODY. I did say I reckon about TWO weeks.
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San-Fernando-Valley

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Message 72824 - Posted: 15 Apr 2022, 9:14:54 UTC - in response to Message 72823.  

Sorry, probably didn't read carefully enough ...
But still, ALL users?
Well, it would be worth a try.
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Septimus

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Message 72826 - Posted: 15 Apr 2022, 9:51:47 UTC - in response to Message 72824.  

Sorry, probably didn't read carefully enough ...
But still, ALL users?
Well, it would be worth a try.


It really is make or break time I think.
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San-Fernando-Valley

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Message 72828 - Posted: 15 Apr 2022, 10:46:22 UTC - in response to Message 72826.  

OK, as soon as my separation queue is empty, I'll give it a try ...
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San-Fernando-Valley

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Message 72832 - Posted: 15 Apr 2022, 11:20:09 UTC

I just noticed that the number of unsent N-Body tasks has increased from
13'864'818 to
13'865'487 so
it is getting "worse".
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Septimus

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Message 72834 - Posted: 15 Apr 2022, 11:27:13 UTC - in response to Message 72832.  
Last modified: 15 Apr 2022, 12:10:48 UTC

I just noticed that the number of unsent N-Body tasks has increased from
13'864'818 to
13'865'487 so
it is getting "worse".


Not surprised but will soldier on and do my 2,000.
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San-Fernando-Valley

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Message 72836 - Posted: 15 Apr 2022, 12:38:15 UTC - in response to Message 72834.  

... so now it has dropped
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Kiska

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Message 72838 - Posted: 15 Apr 2022, 13:07:50 UTC

Here is the last 72 hours:

You can access the non-modified version of this dashboard here: https://grafana.kiska.pw/d/boinc/boinc?orgId=1&var-project=milkyway%40home&from=now-72h&to=now&chunkNotFound=
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Message boards : Number crunching : Validation inconclusive

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