3.4 Building on Parallel Platforms
NetCDF makes available the parallel I/O features of HDF5, allowing
parallel I/O from netCDF-4 linked programs.
For parallel I/O to work, HDF5 must be installed with
–enable-parallel, and an MPI library (and related libraries) must be
made available to the HDF5 configure. This can be accomplished with
the mpicc wrapper script, in the case of MPICH2.
The following works on our netCDF testing system:
CC=mpicc ./configure --enable-parallel --prefix=/shecky/local_par
--with-zlib=/shecky/local_par --disable-shared && make check install
There is no need to specify –enable-parallel for netCDF. The netCDF
configure program will recognize that HDF5 was built for parallel I/O
and will turn on netCDF-4's parallel I/O features.
CC=mpicc ./configure --enable-netcdf-4 --prefix=/shecky/local_par
--with-hdf5=/shecky/local_par && make check install
To enable the parallel tests, specify –enable-parallel-tests as an
option to configure. These tests will be run as mpiexec calls. This
may not be appropriate on all systems, especially those which use some
queue for jobs.
For parallel builds the netCDF examples are not built. This is to
avoid cluttering them with MPI_Init/Finalize calls.
