use of MPI derived types in Flexible API

[Jim Edwards]

I want to write a distributed variable to a file and the way the
data is distributed is fairly random with respect to the ordering on the
file.

It seems like I can do several things from each task in order to write the
data -


   1. I can specify several blocks of code using start and count and make
   mulitple calls on each task to ncmpi_bput_vara_all
   2. I can define an MPI derived type and make a single call to
   ncmpi_bput_var_all on each task
   3. I (think I) can use ncmpi_bput_varm_all and specify an imap  (btw:
   the pnetcdf users guide has this interface wrong)

Are any of these better from a performance standpoint?

Thanks,




-- 
Jim Edwards

CESM Software Engineer
National Center for Atmospheric Research
Boulder, CO
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.mcs.anl.gov/pipermail/parallel-netcdf/attachments/20140924/764dc96e/attachment.html>