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This page describes how to configure and use the model restart facility.
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n.b. the restarted run must always have the same parallel decomposition (TASKS x THREADS)
How to configure restarts
The namelist NAMRES controls model restarts (see ifs/namelist/namres.h). The most useful variables in this namelist are: NFFRES and NRESTS.
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By default, old restart files are automatically deleted. This is advisable because the files can be very large. One restart file at T1279 is approx 500Mb when using 128 MPI tasks, giving a total restart file requirement of approx 64Gb. Changing this behaviour is not possible via NAMRES. Instead, edit the file ifs/setup/sures.F90 and change the default value of LDELRES to TRUE.
Model code
The key subroutines for restarts are:
monio.F90 - sets up the internal arrays to determine write times
wrresf.F90 - calls the I/O subsystem to write out the model arrays. If you add more arrays to the model and want them to appear in restart files, change this routine.
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