Bug#749859: Fwd: Re: [EXTERNAL] netcdf sizes in exodus

Wed Nov 11 14:11:53 UTC 2015

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256

- -------- Forwarded Message --------
Subject:     Re: [EXTERNAL] netcdf sizes in exodus
Date:     Tue, 10 Nov 2015 18:31:19 +0000
From:     Sjaardema, Gregory D <gdsjaar at sandia.gov>
To:     Alastair McKinstry <mckinstry at debian.org>

I’ve (re)opened an issue with the netcdf project —
https://github.com/Unidata/netcdf-c/issues/148
_..Greg_
_
_
- -- 
"A supercomputer is a device for turning compute-bound problems into
I/O-bound problems”

From: Alastair McKinstry <mckinstry at debian.org
<mailto:mckinstry at debian.org>>
Organization: Debian
Date: Tuesday, November 10, 2015 at 9:50 AM
To: "Sjaardema, Gregory D" <gdsjaar at sandia.gov <mailto:gdsjaar at sandia.gov>>
Subject: [EXTERNAL] netcdf sizes in exodus

Hi,

I am the maintainer of Exodus in Debian (packaged for use in VisIT, etc).
You wrote a README note in which you state:

    Exodus requires NetCDF version 4.2.1.1 or later.

    The netcdf library must be modified slightly in order to handle the
    exodus datamodel. The specific changes are:

    1. include/netcdf.h -- Modify the following defines:

    #define NC_MAX_DIMS     65536    /* max dimensions per file */
    #define NC_MAX_VARS     524288   /* max variables per file */
    #define NC_MAX_VAR_DIMS 8        /* max per variable dimensions */

This has led to a bug report in netcdf:
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=749859

As of now, Debian has NetCDF 4.4.0. As of the discussion at:
http://lists.mcs.anl.gov/pipermail/moab-dev/2013/005870.html
it appears that limits may no longer need to be changed.

Can you confirm whether this change is still required?

Best regards
Alastair McKinstry

PS. Are you at Supercomputing'15 ?