[MITgcm-support] checkpointing problem

[heimbach at mit.edu]

Fiona,

it's hard to tell what's going out without more info.
One obvious guess is that you have
excessive recomputations going on, which would explain
going back to timestep one at each timestep.
Could you send me the following files
- taf_ad.log
- ECCO_CPPOPTIONS.h
- CPP_OPTIONS.h

-Patrick

PS:
I assume you are using TAF, are you?
If you are using tamc.h there should be a file called
tamc_ad.log or <something>.prot
Please send me this one then.



Quoting Fiona McLay <m221003 at regen.dkrz.de>:

> Hello,
> 
> I am trying to use the adjoint to the MIT model with an eddy resolving
> channel. I can get the adjoint model to run but I appear to be having
> trouble with the checkpointing scheme. It looks as if the checkpoints are
> being contiuously overwritten so that it can only store one checkpoint of
> each level at a time, leading to many recomputations.  It goes back to
> the 1st timestep every time it needs a level 3 checkpoint, and to the last
> level 3 checkpoint everytime it needs a level 2 checkpoint.
> 
> Any idea what I am doing wrong?  I have checked that I have
> allow_tamc_checkpointing defined, and that I have the right number of
> checkpoints for the length of run.
> 
> Any help would be much appreciated.
> 
> Thanks
> 
> Fiona
> 
> 
> 
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