[Wrf-users] Producing >2Gb NetCDF files with WRF

[wrfhelp]

Aaron Sims is correct. For WRF 3.0 and netCDF 3.6 or later versions,  
you can set
environment variable WRFIO_NCD_LARGE_FILE_SUPPORT before you compile,  
and this will
modify the WRF netCDF IO routine to use the call for netCDF large file  
support.

wrfhelp

On May 19, 2009, at 10:17 AM, Kemp, Eric M (IS) wrote:

>
> I'm still reviewing the NetCDF documentation, but so far it seems  
> the calling program (WRF) is supposed to pass a flag to NetCDF to  
> turn 64-bit offset on.  So it's also a WRF issue.
>
> And I'm using NetCDF 4.0.1.
>
> -Eric
>
>
> -----Original Message-----
> From: wrf-users-bounces at ucar.edu on behalf of Josh Hacker
> Sent: Tue 5/19/2009 12:12 PM
> To: Kemp, Eric M (IS)
> Cc: wrfhelp at ucar.edu; wrf-users at ucar.edu
> Subject: Re: [Wrf-users] Producing >2Gb NetCDF files with WRF
>
> Eric,
>
> This is a netCDF issue, not a WRF issue.  Look at the netCDF
> documentation for notes on large file support, or possibly update your
> version of netCDF.
>
> Josh
>
> Kemp, Eric M (IS) wrote:
> > Dear WRF Community:
> >
> > I'm unable to produce WRF NetCDF files larger than 2 Gb in size.   
> (I'm
> > experimenting with very large domains for hurricane and climate  
> simulations.
> > Also, I'm using 64bit executables on a 64bit OS.)  When I run  
> real.exe with
> > debugging turned on, I see a "One or more variable sizes violate  
> format
> > constraints" message from NetCDF.  The on-line NetCDF  
> documentation suggests
> > using a "64 bit offset" mode when first creating the file.  Is  
> there a reason
> > WRF doesn't do this?  Is this a bug, or is there a compile time or  
> runtime
> > option for turning this on?
> >
> > Thanks,
> >
> > -Eric
> >
> > Eric M. Kemp
> > Meteorologist
> > Northrop Grumman Information Systems
> > Advisory Services Division (TASC)
> > 4801 Stonecroft Boulevard
> > Chantilly, VA 20151
> > 301-286-9768              (NASA Goddard Office)
> > 703-633-8300 x7078 (Chantilly SLEET Lab)
> > 703-633-8300 x8278 (Chantilly Office)
> > 703-449-3400              (Chantilly Fax)
> >
> >
> >
> >
> >  
> ------------------------------------------------------------------------
> >
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> > Wrf-users at ucar.edu
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>
> --
> Joshua Hacker
> Research Applications Laboratory
> NCAR/UCAR
> email: hacker at ucar.edu
> voice: 303-497-8188
> fax: 303-497-8386
>
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