Checkpointing

The following inputs must be preceded by the prefix mfix and control checkpoint/restart:

	Description	Type	Default
check_file	Prefix to use for checkpoint output file name.	String	chk
check_int	Checkpoint output interval in number of timesteps (0 to disable).	Int	0
check_per_approx	Approximate checkpoint output interval in simulation time (0 to disable).	Real	0
check_walltime_interval	Checkpoint output interval in elapsed run time (HH:MM:SS). Only one of check_int, check_per_approx, or check_walltime_interval may be specified.	String	None
geom_chk_write	Write the EB geometry data into geom_chk_file and additionally, geom_levelset_chk_file if levelset refinement is enabled.	Bool	false
geom_chk_file	Name of the EB checkpoint file that is used to store or read the unrefined geometry.	String	geom_chk
geom_levelset_chk_file	Name of the EB checkpoint file that is used to store or read the refined geometry, i.e. when levelset refinement is enabled.	String	geom_levelset_chk

Replication

Domain replication is a restart capability that takes the domain stored in a checkpoint file and duplicates it according to the user‑specified replication factors. This feature is available only for fully periodic domains. Its primary purpose is to support scaling studies where the amount of work per processor must remain constant.

The following inputs must be preceded by the prefix mfix.

	Description	Type	Default
repl_x	Replicate initial data by this factor in the x-direction.	Int	1
repl_y	Replicate initial data by this factor in the y-direction.	Int	1
repl_z	Replicate initial data by this factor in the z-direction.	Int	1