[Developers] Steering checkpointing by wall time

[Jian Tao]

I guess it doesn't really matter here. Since the parameter
is a real number, one can use a fraction of an hour.

Regards,
Jian

Burkhard Zink wrote:
> Hours or minutes both sound good to me.
> 
> - B
> 
> Ian Hinder wrote:
>> Erik Schnetter wrote:
>>> I suggest to add a new parameter to CactusBase/IOUtil which  
>>> checkpoints every so many wall clock hours.  This is often more  
>>> convenient than choosing the checkpointing interval by iterations.
>> This is a good idea.  Should it be hours, or minutes or seconds?  I
>> think the termination condition is done in minutes, which seems
>> reasonable to me.
>>
>>
>>> -erik
>>>
>>> Index: param.ccl
>>> ===================================================================
>>> RCS file: /cactusdevcvs/CactusBase/IOUtil/param.ccl,v
>>> retrieving revision 1.51
>>> diff -u -r1.51 param.ccl
>>> --- param.ccl	18 Apr 2007 16:00:12 -0000	1.51
>>> +++ param.ccl	7 May 2008 18:50:15 -0000
>>> @@ -142,6 +143,11 @@
>>>      1:* :: "Every so many iterations"
>>>     -1:0 :: "Disable periodic checkpointing"
>>>   } -1
>>> +REAL checkpoint_every_walltime_hours "How often to checkpoint"  
>>> STEERABLE = ALWAYS
>>> +{
>>> +  (0:* :: "After so much walltime has passed"
>>> +  -1   :: "Disable periodic walltime checkpointing"
>>> +} -1
>>>   BOOLEAN checkpoint_on_terminate "Checkpoint after last iteration"  
>>> STEERABLE = ALWAYS
>>>   {
>>>   } "no"
>>>
>>
>