Re: Maximum netCDF file size available in NCL

HI Bill,
Standard NetCDF has a size limit of 2GB per file. There is a large
file option that allows much larger files. You can set this option
using NCL's setfileoption:

setfileoption("nc","Format","LargeFile")

You must do this prior to creating the file in NCL.

There are still some size restrictions with this mode. To remove
virtually all size restrictions you can use the NetCDF4 format;

setfileoption("nc","Format","NetCDF4Classic")

More information can be found at http://www.ncl.ucar.edu/Document/Functions/Built-in/setfileoption.shtml

  -dave

On Oct 3, 2010, at 8:59 AM, Capehart, William J wrote:

> Hi All
>
> We are working with an ncl program that's been post processing a
> heavy volume of wrf data. So far the files have been large but NCL
> has tolerated the requirements. However, those size requirements
> (both horizontal and temporal) have increased and the script begins
> to falter. This happens using both methods of making a netcdf file
> in NCL, the "quick" where you "file->var = var" the data into the
> open file and the "efficient" way when you have a define mode and a
> data-write mode. Is there a size limit in working with NCL (either
> in general or just using the NCL executables that comes from the
> earth system grid pages). Also is there any settings in the unix
> shell or in NCL that will let us write to the larger file sizes.
>
> Thanks Much
> Bill
>
>
> ================================================================
> Bill Capehart <William.Capehart@sdsmt.edu> Associate Professor
> Institute of Atmospheric Sciences Department Chair
> 213 Mineral Industries Building
> South Dakota School of Mines and Technology Ph: +1-605-394-1994
> 501 East Saint Joseph Street Fax: +1-605-394-6061
> Rapid City, SD 57701-3995 Mobile: +1-605-484-5692
> =================== http://capehart.sdsmt.edu ==================-
>
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Received on Sun Oct 3 09:23:56 2010