Ways to bypass the limits.

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Profile Tim
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Message 1655347 - Posted: 21 Mar 2015, 9:54:38 UTC

I was fooling around my tasks and I saw a user with 1400+ tasks in progress.
Did he found a way to bypass the limits, or it is something else? I already PM him a week ago, but he didn’t reply.

The user is Mr. John Chrzastek and his computer id is 7033569

http://setiathome.berkeley.edu/hosts_user.php?userid=9738701
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Claggy
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Message 1655350 - Posted: 21 Mar 2015, 10:04:26 UTC - in response to Message 1655347.  

Resend lost tasks is off, he's probably got a flaky connection and getting scheduler timeouts, tasks that never reached his host will time out eventually,

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Profile Tim
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Message 1655399 - Posted: 21 Mar 2015, 15:25:47 UTC

I will keep an eye on him. Even with lost tasks he must lost and found his files 8 times.

And the tasks are still growing.

Tim
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Message 1655685 - Posted: 22 Mar 2015, 7:32:43 UTC

I don't want to accuse anyone but looking at the tasks he's probably using the rescheduler swapping all MB's to the CPU and getting more and more 100 tasks for his GPU or the other way around...

Don't know why because there has hardly been a shortage of MB work.
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Message 1655704 - Posted: 22 Mar 2015, 9:59:52 UTC - in response to Message 1655399.  

I will keep an eye on him. Even with lost tasks he must lost and found his files 8 times.

And the tasks are still growing.

Tim

That's the point, with 'Resend lost tasks' being off, the scheduler can't resend the lost tasks, I recon his client has got a maximum of 124 tasks on hand (probably less),

Boinc tells the scheduler it's got, say 40 GPU, and say 20 CPU, But scheduler can't check Boinc database and confirm what tasks client has,
so scheduler just sends another say 20 GPU and 10 CPU Wu, still well within limit, But scheduler reply doesn't get to client,
So client asks again, saying it's got now 39 GPU, and 20 CPU, scheduler sends some more work, and doesn't get through again,
a bit later a scheduler reply does get through, and client gets some fresh work.

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Message 1655705 - Posted: 22 Mar 2015, 10:03:11 UTC - in response to Message 1655685.  

I don't want to accuse anyone but looking at the tasks he's probably using the rescheduler swapping all MB's to the CPU and getting more and more 100 tasks for his GPU or the other way around...

Don't know why because there has hardly been a shortage of MB work.

That's not happening, he's not rescheduling, he has great blocks of lost tasks, all sent at the same time, none of those lost blocks are getting returned as completed by a different application.

All tasks for computer 7033569

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Message 1655722 - Posted: 22 Mar 2015, 11:55:58 UTC - in response to Message 1655705.  
Last modified: 22 Mar 2015, 12:06:08 UTC

I don't want to accuse anyone but looking at the tasks he's probably using the rescheduler swapping all MB's to the CPU and getting more and more 100 tasks for his GPU or the other way around...

Don't know why because there has hardly been a shortage of MB work.

That's not happening, he's not rescheduling, he has great blocks of lost tasks, all sent at the same time, none of those lost blocks are getting returned as completed by a different application.

All tasks for computer 7033569

Claggy


Following on, these are blocks of work that have been sent, where later blocks have been completed, and these haven't:

13 Mar 2015, 22:17:27 UTC   5 tasks

13 Mar 2015, 22:25:31 UTC  77 tasks

13 Mar 2015, 22:35:55 UTC 137 tasks

13 Mar 2015, 22:47:48 UTC  95 tasks

13 Mar 2015, 23:00:34 UTC  96 tasks

13 Mar 2015, 23:18:47 UTC  23 tasks

14 Mar 2015, 5:42:44 UTC   46 tasks

14 Mar 2015, 7:46:28 UTC   49 tasks

14 Mar 2015, 8:50:42 UTC   24 tasks

15 Mar 2015, 0:22:13 UTC   95 tasks

15 Mar 2015, 0:35:51 UTC   68 tasks

15 Mar 2015, 0:47:52 UTC   69 tasks

15 Mar 2015, 0:55:14 UTC  100 tasks

15 Mar 2015, 1:01:48 UTC   44 tasks

15 Mar 2015, 11:07:06 UTC  10 tasks

15 Mar 2015, 11:54:24 UTC  18 tasks

15 Mar 2015, 12:40:13 UTC  47 tasks

15 Mar 2015, 15:21:23 UTC  48 tasks

15 Mar 2015, 21:53:27 UTC   1 task

16 Mar 2015, 21:48:30 UTC  90 tasks

17 Mar 2015, 0:03:03 UTC    4 tasks

18 Mar 2015, 0:06:29 UTC    5 tasks

18 Mar 2015, 3:48:14 UTC    2 tasks

18 Mar 2015, 5:59:57 UTC    4 tasks

19 Mar 2015, 0:11:29 UTC   10 tasks

19 Mar 2015, 6:50:22 UTC    3 tasks

19 Mar 2015, 23:32:38 UTC  47 tasks

20 Mar 2015, 0:15:14 UTC   13 tasks

20 Mar 2015, 1:54:54 UTC    5 tasks

20 Mar 2015, 11:18:29 UTC  10 tasks

20 Mar 2015, 22:19:06 UTC   6 tasks

20 Mar 2015, 23:39:35 UTC   8 tasks

21 Mar 2015, 0:06:05 UTC    1 task

21 Mar 2015, 2:13:37 UTC    4 tasks

21 Mar 2015, 11:31:13 UTC  71 tasks

21 Mar 2015, 12:48:45 UTC  36 tasks

21 Mar 2015, 14:14:15 UTC  36 tasks

21 Mar 2015, 16:11:04 UTC  19 tasks

21 Mar 2015, 17:30:31 UTC  20 tasks

21 Mar 2015, 18:37:24 UTC   9 tasks

22 Mar 2015, 0:04:09 UTC   29 tasks

22 Mar 2015, 2:07:53 UTC   78 tasks

Total 1562 definite lost tasks.

4 tasks definitely received and in progress (2 CPU and 2 GPU)

These blocks may or may not have been received (Total 124 including the 4 inprogress Wu's):

22 Mar 2015, 3:39:05 UTC   39 tasks

22 Mar 2015, 5:36:46 UTC   31 tasks

Note: there's less than 5 minutes between these tasks been issued, whether these are from one or two scheduler requests is open to question:

22 Mar 2015, 5:38:44 UTC   20 tasks

22 Mar 2015, 6:43:01 UTC   10 tasks

22 Mar 2015, 9:29:28 UTC   20 tasks


1687 minus 1562 makes a possible maximum of 125 tasks in progress, But probably less.

Edit: Yes, I know my counting is off by one, I'm not going to go through and manually count the number of Wu's in each block again.

Claggy
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Richard Haselgrove Project Donor
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Message 1655724 - Posted: 22 Mar 2015, 12:06:22 UTC - in response to Message 1655722.  

And that's one of the ways that database bloat starts, when 'resend lost tasks' is turned off.

There's already the beginning of an uptick visible for 'results in the field' (blue line):



That's not enough to account for today's database slowness - that must be something else - but it's ominous. The slower the database is, the more lost results get created: and the excess results in the table indexes slow the database down even more. I don't expect full-blown inflation to set in until next weekend or later, but it could be on the way.
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Profile Brent Norman Crowdfunding Project Donor*Special Project $75 donorSpecial Project $250 donor
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Message 1655728 - Posted: 22 Mar 2015, 12:53:47 UTC - in response to Message 1655724.  

I thought too that the resend off would just shoot tasks though the roof with waiting up to 6 weeks for a task that can't be completed to resend, then wait again.

I have a feeling it is "Resend OFF and Deleted" since tasks are not accumulating.
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Message 1655730 - Posted: 22 Mar 2015, 13:03:09 UTC - in response to Message 1655724.  

I noticed something similar on a host I was watching. Seems there are quite a few older tasks that are not being worked. While I was watching the older tasks newer tasks were being worked and completed. The best I can figure this host has around 79 'Lost' tasks waiting to time out; http://setiathome.berkeley.edu/results.php?hostid=7159696&offset=360&show_names=0&state=0&appid=

I have about a dozen 'Lost' tasks on my hosts, that I know of. It would be nice if 'Resent lost tasks' could be enabled for at least a few hours a week so these tasks could be dealt with rather than waiting to time out.
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Message 1655824 - Posted: 22 Mar 2015, 21:26:52 UTC
Last modified: 22 Mar 2015, 21:27:31 UTC

Not about limits, but personally I would rather prefer having those tasks carrying out the gaussian search and not those tasks which do not do this thing.

Also the .vlar tasks are apparently returning nothing of interest as well.

Those tasks having a high angle range could possibly be of more interest, though.
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Message 1655956 - Posted: 23 Mar 2015, 7:44:49 UTC - in response to Message 1655824.  

Also the .vlar tasks are apparently returning nothing of interest as well.

?????


Those tasks having a high angle range could possibly be of more interest, though.

???

P.S.
What happened with musicplayer ... ;)
 


- ALF - "Find out what you don't do well ..... then don't do it!" :)
 
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