Communication Deferred - climateprediction.net & SETI@home

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Profile Jord
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Message 46355 - Posted: 19 Nov 2012, 11:44:34 UTC - in response to Message 46354.  

Seti has trouble giving work to computers, it's been like that for the past week or so. As for CPDN, I don't know.

Always best first check at the project forums if they have problems. Communication deferred just means that BOINC managed to get into contact with the project server, but that that server apparently has problems, and thus BOINC will try again at a later time.
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Profile Jord
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Message 46357 - Posted: 19 Nov 2012, 12:07:04 UTC - in response to Message 46355.  

Seti News:

Continued server problems.
We're continuing to have issues due to a database problem early last week and a botched attempt to fix it.

The problem is that the result and host tables in the database have grown large enough, and hosts have gotten fast enough that the lookup of result in process for a host and the enumeration of new results to send don't finish before the web connection times out either on the server or the client side. This resulted in hosts being assigned large number or results to compute without the transaction that tells them about these results being completed. The host. think it received no results would then contact the server for more results, which it would again not receive.

This isn't a hardware problem. The database currently fits in memory and the processors are fast. We've just crossed a threshold where each host computes fast enough that host queues and the result table have become large enough to cause this problem. To solve it, we've put per host limits on results in process back in place. But hosts that are having this problem will probably continue to have it until the average number of results per host has fallen to a workable level. That could take weeks.

For a more permanent fix, we plan do more work in each result by quadrupling the size of the workunits. But that fix will probably take months to implement and test

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Profile Byron Leigh Hatch @ team Carl ...
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Message 46378 - Posted: 20 Nov 2012, 13:00:25 UTC - in response to Message 46354.  




there's no work available at CPDN at present, hasn't been for the last 5 to 6 weeks ...
from what I have been reading on the BOINC climateprediction.net Message boards
climateprediction.net is going to update their BOINC server software code ... before any more work is released.
apparently that's a big job, so it could be a month or two ... don't know ??
that's unofficial so please ... don't quote me on that.

if you subscribe to the News and Announcements thread
they will send you an e mail to your in box as soon as they announce any news.

hope this helps ?
Byron


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Message boards : Questions and problems : Communication Deferred - climateprediction.net & SETI@home

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