On 30 Sep 2016, at 16:04, dumsani g14n8326@campus.ru.ac.za wrote:
Hi,
When running long simulations with checkpointing, it might sometimes be useful to change certain parameters, especially I/O (e.g. the frequency of outputting a certain variable). Is this possible in Cactus/Simfactory? I notice that upon recovery (in the next re-start) Simfactory reads the parameters from a checkpoint file, not from any of the parfiles dumped within the job directory.
Any suggestions/responses will be highly appreciated.
Hi Dumsani,
When you run the simulation again, you give it a new parameter file. It is this new parameter file which is checked for steered parameters; Cactus doesn't look at the output from a previous run. Many parameters can be steered on recovery in this manner, by changing them in the parameter file. Be careful when steering the out_every parameters; you almost certainly want out_criterion = divisor, not the default of "iteration". "iteration" outputs if the current iteration number is N greater than the last output iteration. "divisor" outputs if the current iteration is divisible by N.