3.10 Large File Support
Availability: All operators
Short options: none
Long options: none
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NCO has Large File Support (LFS), meaning that
NCO can write files larger than 2 GB on some 32-bit
operating systems with netCDF libraries earlier than version 3.6.
If desired, LFS support must be configured when both netCDF and
NCO are installed.
netCDF versions 3.6 and higher support 64-bit file addresses as part
of the netCDF standard.
We recommend that users ignore LFS support which is difficult to
configure and is implemented in NCO only to support netCDF
versions prior to 3.6.
This obviates the need for configuring explicit LFS support in
applications (such as NCO) which now support 64-bit files
directly through the netCDF interface.
See Selecting Output File Format for instructions on accessing
the different file formats, including 64-bit files, supported by the
modern netCDF interface.
If you are still interesting in explicit LFS support for netCDF versions
prior to 3.6, know that LFS support depends on a complex,
interlocking set of operating system
1
and netCDF suppport issues.
The netCDF LFS FAQ at
http://my.unidata.ucar.edu/content/software/netcdf/faq-lfs.html
describes the various file size limitations imposed by different
versions of the netCDF standard.
NCO and netCDF automatically attempt to configure LFS at
build time.