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

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

Thanks for that, geophi. Your answer means that I can safely go away for the weekend.

> 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>

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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Sorry to hear that :(

Personally I'd advise upgrading to version 4.13 which is much better at recovering from problems like this.

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