[netcdfgroup] NetCDF4 format and SZIP

• To: <netcdfgroup@xxxxxxxxxxxxxxxx>
• Subject: [netcdfgroup] NetCDF4 format and SZIP
• From: "Pascoe, Stephen (STFC,RAL,SSTD)" <stephen.pascoe@xxxxxxxxxx>
• Date: Mon, 7 Sep 2009 16:44:42 +0100

I'd like to clarify how using HDF5 with SZIP support affects the files
created by the NetCDF4 library.
 
According to the NetCDF4 INSTALL file you can optionally use HDF5+SZIP
when building NetCDF4.  This implies that either SZIP-compressed NetCDF4
is byte-compatible with ZIP-compressed NetCDF4 or that there are 2
incompatible compressed NetCDF4 formats (ZIP and SZIP).  Can you confirm
it is the former?
 
Assuming it is the former, what is the advantage of using SZIP?  Is SZIP
automatically used if the HDF5 library has it?
 
Thanks,
Stephen.
 
---
Stephen Pascoe  +44 (0)1235 445980
British Atmospheric Data Centre
Rutherford Appleton Laboratory
 

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  • Re: [netcdfgroup] NetCDF4 format and SZIP
    • From: Ed Hartnett