[Developers] Recover SaveAndRestore variables with PUGH

[Luca Baiotti]

Thomas Radke wrote:
> Ian Hawke wrote:
> 
>>On Wed, 2006-10-18 at 19:43 -0500, Erik Schnetter wrote:
>>
>>
>>>On Oct 18, 2006, at 03:02:02, Luca Baiotti wrote:
>>
>>
>>>I think the root of the problem is that evolution_method="none" does  
>>>not do anything to time levels.  It should instead copy the previous  
>>>time level into the current time level in the prestep bin.  The  
>>>current mechanism was implemented when people would use only a single  
>>>time level with stationary spacetimes; only with Carpet do people  
>>>want multiple time levels in that case, which breaks things.
>>>
>>>Ian, do you think that this would also solve the problem?
>>
>>
>>It would work, and is rather more satisfactory than modifying MoL (as
>>SaveAndRestore variables just mean "these might be evolved by some other
>>thorn"). 
>>
>>I still believe that the only guaranteed way of ensuring consistency
>>after recovery is to checkpoint all timelevels, even with PUGH, because
>>you never know what somebody's going to try and do.
> 
> 
> If you don't want to solve the problem by modifying PUGH or MoL it's a 
> small thing for me to implement a new boolean parameter 
> IO::checkpoint_all_timelevels (defaulting to "no"?).
> 
> Just let me know.

This discussion has been quiet for a while; so I would assume that the 
last suggestion is supported by everyone.

If this is the case, Thomas please implement your suggestion (it is not 
so urgent, anyway).


Thanks,

Luca.