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Turning the computer off

Questions and Answers : Windows : Turning the computer off
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Profile mo.v
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Message 4829 - Posted: 29 Sep 2004, 23:17:23 UTC



I have Windows 2000 and have just transferred from classic to Boinc, which is up and running.

1 Am I right in thinking that if I just turn the box off, then when I reboot, the model may start at 0% again?

2 And that to avoid losing work, I have to suspend the model before turning off?

3 If this is indeed the case, what will happen if the system crashes eg in a thunderstorm?

Thanks, Mo


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Message 4830 - Posted: 30 Sep 2004, 0:17:15 UTC

Hi Mo,

The safest thing is to suspend and then exit BOINC. But you will most likely be okay if there is an unexpected power failure/reboot. I had one beta model that had problems after a power failure, but I've rebooted a few while still processing lately and it's come out okay. No guarantees of course...

George
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Message 4865 - Posted: 30 Sep 2004, 23:46:23 UTC - in response to Message 4830.  

Thanks for that, geophi. Your answer means that I can safely go away for the weekend.
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Message 4925 - Posted: 2 Oct 2004, 2:44:22 UTC - in response to Message 4865.  

> Thanks for that, geophi. Your answer means that I can safely go away for the
> weekend.
>
It should only rewind to the last checkpoint which occur every 144 timesteps or 3 model days. Magically these occur at midnight of day 3, 6, 9, 12, 15, 18, 21, 24, 27, and 30 of every month.
<a href="http://www.boinc.dk/index.php?page=user_statistics&amp;project=cpdn&amp;userid=13"><img border="0" height="80" src="http://13.cpdn.sig.boinc.dk?188"></a>
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Message 6411 - Posted: 26 Nov 2004, 17:08:00 UTC - in response to Message 4925.  

That isn't the experience I've just had sadly. I had to physically reboot after a Windows app locked everything up, and afterwards CPDN has kindly rewound my model to timestep 0. Quite annoying as I was on the 3rd phase after 500 hours.

This was running version 4.05, so I'm not sure if the particular problem has cleared up since then, but I think stability is still the most sorely lacking feature with BOINC and large work units such as CPDN

&gt; It should only rewind to the last checkpoint which occur every 144 timesteps
&gt; or 3 model days. Magically these occur at midnight of day 3, 6, 9, 12, 15,
&gt; 18, 21, 24, 27, and 30 of every month.

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Message 6412 - Posted: 26 Nov 2004, 18:25:30 UTC

Sorry to hear that :(

Personally I'd advise upgrading to version 4.13 which is much better at recovering from problems like this.
"The ultimate test of a moral society is the kind of world that it leaves to its children." - Dietrich Bonhoeffer
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Questions and Answers : Windows : Turning the computer off

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