Dear all,
does anyone experiences slow performance of hpc cluster with netcdf with pnetcdf option ?
is it good option to build netcdf with pnetcdf option ? will it affect simulation ?
any hint/suggestion please ?
thanks
regarding pnetcdf ....
Re: regarding pnetcdf ....
If no one replies with answers, I suggest you try it and see. Then you can report back here.
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arango
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Re: regarding pnetcdf ....
Nope, ROMS does not support pnetcdf 
The parallel pnetcdf library was developed by the Argonne National Laboratory and not UNIDATA. In NetCDF version 4.x the pnetcdf library was incorporated to the NetCDF suite. I haven't look into that in long time. Previously, it required different calls and parameters.
I am puzzled why are you looking into pnetcdf for ROMS. It is very easy to learn more about pnetcdf. You just need to google it and learn/think more about it.
I use google several times at day. There is lots of information out there We just need to be more curious and look for the answers ourselves...
I have reported about parallel I/O in this forum, you just need to do your homework and read such messages.
The parallel pnetcdf library was developed by the Argonne National Laboratory and not UNIDATA. In NetCDF version 4.x the pnetcdf library was incorporated to the NetCDF suite. I haven't look into that in long time. Previously, it required different calls and parameters.I am puzzled why are you looking into pnetcdf for ROMS. It is very easy to learn more about pnetcdf. You just need to google it and learn/think more about it.
I use google several times at day. There is lots of information out there
We just need to be more curious and look for the answers ourselves...I have reported about parallel I/O in this forum, you just need to do your homework and read such messages.