Checkpointing & Recovery

Thorn IOFlexIO can also be used for creating IEEEIO checkpoint files and recovering from such files later on.

Checkpoint routines are scheduled at several timebins so that you can save the current state of your simulation atfer the initial data phase, during evolution, or at termination. Checkpointing for thorn IOFlexIO is enabled by setting the parameter IOFlexIO::checkpoint = "yes".

A recovery routine is registered with thorn IOUtil in order to restart a new simulation from a given IOFlexIO checkpoint. The very same recovery mechanism is used to implement a filereader functionality to feed back data into Cactus.

Checkpointing and recovery are controlled by corresponding checkpoint/recovery parameters of thorn IOUtil (for a description of these parameters please refer to this thorn's documentation). The parameter IO::checkpoint_every_walltime_hours is not (yet) supported.