Message boards : CMS Application : Occasional lack of work units?
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Jim1348

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Message 45709 - Posted: 17 Nov 2021, 15:22:40 UTC
Last modified: 17 Nov 2021, 15:23:24 UTC

I am wondering what causes the occasional lack of work units. I know they fill the WU's with "jobs" when available, and sometimes they are not available. It is usually only for a short period, ten minutes or so, and then they are back. It is not a problem for me, since it is an insignificant amount of time without work.

But I am wondering about the larger cause. Is it that the scientists don't create enough work, or that the servers sometimes can't dish it out on time?
The overall availability rate has actually been pretty good.
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Harri Liljeroos
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Message 45711 - Posted: 17 Nov 2021, 18:57:48 UTC

Maybe the 'Ready to send' queue is full of sixtrack tasks. If your setup does not accept those, you may not get what you want. There are also two separate download servers (as you can see from different server status page looks) and the other server may not have what you request.
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Jim1348

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Message 45712 - Posted: 17 Nov 2021, 23:12:07 UTC - in response to Message 45711.  

Thanks. I do not do the sixtracks, at least not on that machine.
The memory requirements are so different I usually use different machines.
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ivan
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Message 45716 - Posted: 18 Nov 2021, 8:26:23 UTC - in response to Message 45709.  

I am wondering what causes the occasional lack of work units. I know they fill the WU's with "jobs" when available, and sometimes they are not available. It is usually only for a short period, ten minutes or so, and then they are back. It is not a problem for me, since it is an insignificant amount of time without work.

But I am wondering about the larger cause. Is it that the scientists don't create enough work, or that the servers sometimes can't dish it out on time?
The overall availability rate has actually been pretty good.

I'm the only one currently generating CMS@Home jobs. I submit "workflows" of 10,000 jobs each. Currently these last about two days, but the uptake by volunteers is quite variable, e.g. when no SixTrack jobs are available our usage can expand by as much as 50%. I have to check several times per day to estimate when I need to inject a new batch. Sometimes I get it wrong, sometimes I forget to check (for some reasons this seems mainly to happen on Saturday nights...). I apologise if this causes problems for you volunteers, but remember that I'm a volunteer too!
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Message boards : CMS Application : Occasional lack of work units?


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