Hi Daniele,
I got finally got a chance to look into the NetCDF Output code.  It appears the 
issue is due to the writer being created before the parseParams call in the 
NetCDFOutputManager constructor.  The private attribute “compressionLevel” is 
defaulted to “0” during instantiation and then used in the getWriter call.  
However the “parseParams” call which immediately follows the creation of the 
writer object is where the system configuration is read and the 
“compressionLevel” value is properly set.

I see you created a bug ticket.  I’ll add a comment with my findings.

Thanks,

Kevin M. Weiss
Software Engineer
CRITICAL NETWORKS / HARRIS CORPORATION
harris.com  / [email protected]


From: [email protected] [mailto:[email protected]] On Behalf Of 
Daniele Romagnoli
Sent: Wednesday, February 03, 2016 11:38 AM
To: Weiss, Kevin <[email protected]>
Cc: [email protected]
Subject: Re: [Geoserver-users] NetCDF Compression Settings

Hi Kevin,
We had this working when specifying NetCDF4-classic output format.
I will check that in the next days looking for any regression occurred in the 
meantime. 

Cheers,
Daniele

On Wed, Feb 3, 2016 at 3:51 PM, [email protected] <[email protected]> wrote:
Hello,

Sorry for posting this twice, but I think my first attempt was hidden due to 
Outlook's preference of sending HTML mail.

I'm trying to enable NetCDF compression via the NetCDF Output plugin in 
GeoServer 2.8.1.  I have set a compression value (5) in both the individual 
layer settings as well as the global settings; however, all WCS 2.0.1 
NetCDF4-Classic responses appear to be the uncompressed file size.

I believe I have verified that they are uncompressed by running the following 
command:
`ncdump -h -s <netcdf file> | grep DeflateLevel`

Sample files which are known to be compressed respond with their compression 
level, but the GeoServer responses do not display anything.

Is there a step I could be missing to enable compression?  Has anyone else 
gotten this working?

Thanks,

Kevin M. Weiss
Software Engineer
CRITICAL NETWORKS / HARRIS CORPORATION
harris.com  / [email protected]


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Ing. Daniele Romagnoli
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