Getting too many tasks at once
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Message boards : Windows : Getting too many tasks at once

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mengpangwang
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Message 20891 - Posted: 25 Jul 2015, 15:12:34 UTC
Last modified: 25 Jul 2015, 15:56:55 UTC

I use BOINC manager for this project.
2 days ago, I pressed "Allow new tasks", and then AFK for a few (3-5) minutes.
When I came back, the server had sent me 400 Mini Collatz Conjecture v6.00 tasks.
Each of them takes about 4 hours to complete.

How could that happen?
I thought the project would send only a "proper" amount of tasks, but 400?
That's more than any normal user could handle.

The server will send a huge amount of tasks if you don't tell it NOT to allow new tasks.
I would like to know if this is a bug or just normal. (So an user should always pay attention when running the project.)

P.S. I know how to abort the tasks, I just not want to see my task history get messed up. I appreciate any solution or suggestion.

State: All (409) . In progress (243) . Valid (158) . Invalid (3) . Error (5)
Application: All (409) . Large (5) . Micro (0) . Mini (400) . Solo (4)

http://boinc.thesonntags.com/collatz/results.php?userid=227552

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Message 20894 - Posted: 26 Jul 2015, 10:50:46 UTC - in response to Message 20891.

I use BOINC manager for this project.
2 days ago, I pressed "Allow new tasks", and then AFK for a few (3-5) minutes.
When I came back, the server had sent me 400 Mini Collatz Conjecture v6.00 tasks.
Each of them takes about 4 hours to complete.

How could that happen?
I thought the project would send only a "proper" amount of tasks, but 400?
That's more than any normal user could handle.

The server will send a huge amount of tasks if you don't tell it NOT to allow new tasks.
I would like to know if this is a bug or just normal. (So an user should always pay attention when running the project.)

P.S. I know how to abort the tasks, I just not want to see my task history get messed up. I appreciate any solution or suggestion.


Do you have a 10 day cache setup on your system? If so that could be somewhere in the realm of possibility as 8 units at a time for 4 hours, and 6 times 4 equals 24 hours, means 8 times 6 equals 48 units per day, over 10 days that is 480 units.

mengpangwang
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Message 20895 - Posted: 26 Jul 2015, 13:25:02 UTC - in response to Message 20894.


Do you have a 10 day cache setup on your system? If so that could be somewhere in the realm of possibility as 8 units at a time for 4 hours, and 6 times 4 equals 24 hours, means 8 times 6 equals 48 units per day, over 10 days that is 480 units.


My cache setup was 7 days. That's probably the problem. Now I have set it to 1 day.
I hope the problem would be solved in the next few days.(Still computing, 211 tasks left to complete)

Thank you for pointing it out for me!
Many thanks.

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Message 20900 - Posted: 27 Jul 2015, 11:28:14 UTC - in response to Message 20895.


Do you have a 10 day cache setup on your system? If so that could be somewhere in the realm of possibility as 8 units at a time for 4 hours, and 6 times 4 equals 24 hours, means 8 times 6 equals 48 units per day, over 10 days that is 480 units.


My cache setup was 7 days. That's probably the problem. Now I have set it to 1 day.
I hope the problem would be solved in the next few days.(Still computing, 211 tasks left to complete)

Thank you for pointing it out for me!
Many thanks.


No problem, the default of 10 days was done back in the dial-up days and just never changed, most people now use broad band and a much smaller one will work just fine. If you have a problem of a project not being able to deliver enough tasks to get thru some outages, planned or unplanned, you can always setup a 2nd project with a zero Resource share. That way it will only get work when your primary project cannot deliver any, and it will stop getting work when your primary project comes back online again.

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Message 20906 - Posted: 27 Jul 2015, 18:46:58 UTC

When the BOINC client connects to the server, is requests N number of seconds of work, how many processors it has, and how long it takes to run a WU.
The server takes seconds x processors / run_time to come up with a number of WUs to send. I don't know why the client doesn't do it and just request the actual number of WUs it wants is beyond me. In other words, there's nothing to fix on the server. The server sends the client the WUs it requested. The only way to fix it is to change the settings on the client to request less work.


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