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Posts by James McDonald

Posts by James McDonald

1) Message boards : Number crunching : tasks restarted at 0% after sitting at 100% (Message 51125)
Posted 5 Jan 2015 by James McDonald
Post:
Ok. Thanks.

2) Message boards : Number crunching : tasks restarted at 0% after sitting at 100% (Message 51123)
Posted 5 Jan 2015 by James McDonald
Post:
Belay that. I think maybe I did get credit for those runs.

How would I know? My account page shows 13.35 completed runs,
but I don't know if those 5 are among them.
3) Message boards : Number crunching : tasks restarted at 0% after sitting at 100% (Message 51122)
Posted 5 Jan 2015 by James McDonald
Post:
The tasks were for Africa 7.22, so that seems relevant.

But the symptoms were different from what you describe. Although the tasks reached
a reported level of 100%, results were never sent back, I think I got no credit, and each
of the tasks resumed computing, but back at 0%.

As far as I can tell, the final results just vanished, but the CPU and clock timers kept
going from their old values as the computation started over from scratch.

4) Message boards : Number crunching : tasks restarted at 0% after sitting at 100% (Message 51115)
Posted 4 Jan 2015 by James McDonald
Post:
I had eight tasks running in parallel. After about 202 hours of elapsed time, for about 192 hours of compute time, five had reached 100% with estimated remaining shown as "..."

After half an hour or so this situation had not changed, except that elapsed time and compute time both kept increasing.

For other reasons, I then rebooted my machine, and all the tasks went back to 0% completed, but still with 202 hours of elapsed time. The estimated remaining was now 86000 hours (apparently a maximum value). When they had again run to the point where about 0.25% was completed, the estimated time to completion began to drop below 86000, as expected.

Does that mean 1000 cpu-hours were just wasted on those five tasks? Should I expect the same on the other three when they reach 100% ? Is there any point in letting the original five run again?

This is my first foray into climate prediction, so I'm not inclined to waste more cycles until I understand what happened.

I'm running a MacBook Pro with one Intel Core i7 processor, 4 cores hyper-threaded, with 16 GB of memory and 1 TB of SSD.




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