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David Cameron
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Message 37048 - Posted: 16 Oct 2018, 12:48:20 UTC - in response to Message 37035.  

Claiming that Canadian beer is better than German beer is a bold statement... but I don't want to start a flame war over beer :)

The reason the unsent WU dropped is because we cleaned up around 7000 WU which were stuck there in a kind of zombie state since July, when there was some manual cleanup of the database. The previous times when there were problems you probably noticed that no tasks were being sent even though there were 7000 unsent. In ATLAS we keep a queue of unsent which is around 20% of the running tasks, which is why you see 2000 now and why it varies with the number of running.
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Message 37053 - Posted: 17 Oct 2018, 0:08:56 UTC - in response to Message 37048.  

Thank you, Dave. We are all looking forward to more reliable task distribution.
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maeax

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Message 37395 - Posted: 22 Nov 2018, 2:26:23 UTC

Atlas show Zero new tasks for the moment!
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David Cameron
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Message 37396 - Posted: 22 Nov 2018, 8:22:33 UTC - in response to Message 37395.  

As you can see on the server status page we have a growing backlog of tasks to assimilate. This means that the total number of tasks hit a limit in our ATLAS submission system which stopped it submitting new tasks. I've increased the limit so there are new tasks now but if the assimilator backlog continues to increase we might have to throttle the submission. The LHC@Home admins are working on how to improve the performance of the assimilator.
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maeax

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Message 37397 - Posted: 22 Nov 2018, 8:29:54 UTC - in response to Message 37396.  

Thank you David,
Atlas-Dashboard is showing 18k Slots in use!
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maeax

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Message 37617 - Posted: 16 Dec 2018, 12:31:31 UTC

Atlas show only 240 unsend Tasks on the Serverpage.
Normal are 2k or 3k?
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djoser
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Message 37723 - Posted: 5 Jan 2019, 1:32:18 UTC

Atlas seems to be out of work.
No unsent tasks on serverpage.
Unfortunately CERN guys are on holidays till monday...
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Erich56

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Message 37724 - Posted: 5 Jan 2019, 8:39:59 UTC - in response to Message 37723.  

Atlas seems to be out of work.
No unsent tasks on serverpage.
the Server Status Page shows about 2700 unsent tasks at this point.
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Message 37725 - Posted: 5 Jan 2019, 9:50:29 UTC

Yes, new tasks are available now.
Seemed to be only a temporary problem between 02.00 and 03.00 CET.
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Harri Liljeroos
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Message 37813 - Posted: 24 Jan 2019, 7:59:17 UTC

The ready to send task buffer has almost dried out (17 and >26000 in progress). Probably because the number of currently running slots of jobs has risen close to 40000 from the usual 10000...15000. The servers might be having a hard time keeping up with the demand.
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Jim1348

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Message 37814 - Posted: 24 Jan 2019, 8:43:16 UTC - in response to Message 37813.  
Last modified: 24 Jan 2019, 8:45:01 UTC

I have received a "No tasks are available for ATLAS Simulation" message since 03:25 UTC.
I will be out of work in six hours (native ATLAS).

EDIT: A manual request just picked up two work units.
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Message 37815 - Posted: 24 Jan 2019, 10:04:44 UTC - in response to Message 37813.  

The servers might be having a hard time keeping up with the demand.

They are now down to zero and I am not getting any more. It looks like last year; deja vu all over again.
Is there a plan?
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David Cameron
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Message 37818 - Posted: 24 Jan 2019, 15:36:06 UTC - in response to Message 37815.  

It's basically what Harri said, the number of ATLAS WU more than doubled overnight and it revealed some weak points in the infrastructure. We're working on fixing these and keeping the queue full.
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Message 37819 - Posted: 24 Jan 2019, 16:02:07 UTC - in response to Message 37818.  

OK, that is a better problem than no work units at all. I can keep a machine active, more or less.
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Harri Liljeroos
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Message 38154 - Posted: 8 Mar 2019, 7:42:49 UTC

We seem to have run out of tasks to send. Two of my tasks were cancelled by server during the night. The graphics at the bottom of this page http://lhcathome.web.cern.ch/projects/atlas indicates that tasks are on their way but not yet here. Houston, do we have a problem?
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Message 38155 - Posted: 8 Mar 2019, 7:49:36 UTC - in response to Message 38154.  

+1
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Message 38156 - Posted: 8 Mar 2019, 8:12:39 UTC

In the past 2 days I've had ~10 native ATLAS canceled by the server on 3 different hosts. None were anywhere near expiry date. Most had run for several hours. This is definitely not a case of caching too many tasks. My watchdog script showed 5 were processing events. I didn't check the other 5.
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Message 38157 - Posted: 8 Mar 2019, 9:08:48 UTC

We had some problems overnight with the services submitting tasks to LHC@home. More WU should be coming in now, apologies for the disruption.
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Message 38161 - Posted: 8 Mar 2019, 12:46:48 UTC - in response to Message 38156.  

In the past 2 days I've had ~10 native ATLAS canceled by the server on 3 different hosts. None were anywhere near expiry date. Most had run for several hours. This is definitely not a case of caching too many tasks. My watchdog script showed 5 were processing events. I didn't check the other 5.


I had a couple as well.
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Message 38529 - Posted: 5 Apr 2019, 6:15:46 UTC

Atlas seems to be out of work
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