[MITgcm-support] mnc output

[Ed Hill]

On Tue, 2006-01-24 at 09:20 +0200, Yosef Ashkenazy wrote:
> Hi,
> 
> Currently I'm performing long runs of the MITgcm. I'm using the mnc 
> package. After relatively long time of simulation (~19200 years) the 
> model starts to produce three or four times the same output at each 
> output point (instead of single output). Do anyone faced this problem 
> before ? Any suggestions ?

Hi Yossi,

I've never seen what you describe.  Thats odd.

Could you try the following:

 - Run the model from a pickup so that the simulation 
   time per run is shorter

 - Are your output files growing close to or perhaps beyond 
   2GB in size?  Large files can cause problems with netCDF 
   and other libraries if they aren't compiled with the 
   proper large-file-support.  There are various settings that 
   you can use to decrease the number of time steps saved in 
   each file such as:  mnc_max_fsize

http://mitgcm.org/r2_web_testing/latest/online_documents/node254.html

If none of the above helps, the best way to track down this problem is
to create a scenario that repeatedly triggers the problem.  So if all
else fails, please create a setup that triggers this problem and then we
can (hopefully) have you send it to us and we'll pick it apart.

Ed

-- 
Edward H. Hill III, PhD
office:  MIT Dept. of EAPS;  Rm 54-1424;  77 Massachusetts Ave.
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