[ET Trac] [Einstein Toolkit] #1637: MoL should automatically allocate storage for sufficient timelevels of evolved variables

[Einstein Toolkit]

#1637: MoL should automatically allocate storage for sufficient timelevels of
evolved variables
-------------------------+--------------------------------------------------
 Reporter:  hinder       |       Owner:                     
     Type:  enhancement  |      Status:  new                
 Priority:  minor        |   Milestone:                     
Component:  Cactus       |     Version:  development version
 Keywords:  MoL          |  
-------------------------+--------------------------------------------------
 The MoL thorn requires that all evolved variables have at least two
 timelevels of data, even if the integration method (e.g. RK4) does not
 need any past timelevels.  It uses one of these timelevels as scratch
 space, potentially in addition to any other scratch space variables.  In
 the case where at least two timelevels are needed for other reasons, this
 is more efficient than allocating an extra scratch space variable.  Rather
 than requiring the evolution thorn to allocate at least two timelevels of
 storage for these variables, MoL should ensure sufficient timelevels via
 the flesh API.

 A related issue is that using timelevels for this purpose is wasteful in
 situations where the timelevel is not used for any other purpose, since
 the timelevel will be checkpointed even though it is only being used for
 temporary storage.

-- 
Ticket URL: <https://trac.einsteintoolkit.org/ticket/1637>
Einstein Toolkit <http://einsteintoolkit.org>
The Einstein Toolkit