[ET Trac] [Einstein Toolkit] #1752: GRHydro con2prim is not a projection

[Einstein Toolkit]

#1752: GRHydro con2prim is not a projection
-----------------------------------+----------------------------------------
 Reporter:  rhaas                  |       Owner:                     
     Type:  defect                 |      Status:  new                
 Priority:  minor                  |   Milestone:                     
Component:  EinsteinToolkit thorn  |     Version:  development version
 Keywords:  GRHydro                |  
-----------------------------------+----------------------------------------
 For proper functionality Carpet requires that the MoL_PostStep group is a
 projection, that is applying it twice in a row may not change values. This
 is the assumption that goes eg into restriction but also into checkpoint
 recovery where MoL_PostStep runs on the current timelevel just after
 recovery. Because of this recovering a checkpoint with GRHydro active is
 not restoring the simulation to a bitwise identical state to what it was
 when writing a checkpoint.

 The best solution would be to make GRHydro no longer use the "old"
 primitives as an initial guess which would also reduce the number of SYNCs
 required.

-- 
Ticket URL: <https://trac.einsteintoolkit.org/ticket/1752>
Einstein Toolkit <http://einsteintoolkit.org>
The Einstein Toolkit