[netcdfgroup] compression without effect

• To: netcdfgroup@xxxxxxxxxxxxxxxx
• Subject: [netcdfgroup] compression without effect
• From: Frank Fuchs <fk.fuchs@xxxxxxxxxxxxxx>
• Date: Tue, 17 Dec 2013 21:34:40 +0100

Hi,

I managed to compile netcdf-4.3.0 using mingw-w64 gcc 4.8.1.
All I had to disabale was DAP (I have no use for anyway).

I tested that I can read and write netcdf files using the newly build .dll
Now I wanted to test compression using the cxx4 interface, enabling it by
ncvar_data.setCompression(true,true,1) for the heaviest of my variables.

However, even for a file filled with constants the files remain as big as
before.
Further tests using nccopy -d9 old.nca new.nca did not result in a
modification of the file size.

Any advise?

Best,
Frank

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