Re: [netcdfgroup] libnetcdf 4.0.0 and 4.1.1 read speed

• To: Denis.Nadeau@xxxxxxxx
• Subject: Re: [netcdfgroup] libnetcdf 4.0.0 and 4.1.1 read speed
• From: Russ Rew <russ@xxxxxxxxxxxxxxxx>
• Date: Thu, 05 Aug 2010 16:15:23 -0600

Hi Denis,

> I have compiled grads with netcdf 4.1.1 lately. 
> 
> When I read a file created from netcdf 4.0.0 it takes more than  5 
> seconds to open.
> When I read the same file converted by ncks using netcdf 4.1.1,  it 
> opens almost instantaneously.
> 
> Deflation and chunking are the same in both files.  Same 'grads' 
> software opening each file (compiled with 4.1.1).
> Is there something in netcdf.4.1.1 library that makes the file being 
> read much quicker than when files are created with netcdf 4.0.0 library?

I don't think so.  Could you make example files available so we can try
to understand what's going on?

--Russ

• Follow-Ups:
  • Re: [netcdfgroup] libnetcdf 4.0.0 and 4.1.1 read speed
    • From: Jennifer Adams

• References:
  • [netcdfgroup] libnetcdf 4.0.0 and 4.1.1 read speed
    • From: Denis Nadeau