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Re: NetCDF interface to HDF; netCDF VERY slow on OSF/1?

Hi Richard,

>From: Richard P. Signell <address@hidden>
>To: address@hidden
>Date: Tue, 28 Jun 1994 10:58:30 -0400 (EDT)

In the above message you wrote:

>I just built the mfhdf netcdf interface to hdf on my
>DEC alpha machine running OSF. 
>
>When I tested my application (a Matlab/netCDF interface), 
>I got an "out of memory" problem from Matlab.  (I have
>160 Mb of memory, and I was loading a 100x100 grid, so 
>I knew something was wrong.)
>
>I went back and ran nctest, and although it finished without
>complaining, it took 3 minutes to complete,  thrashing
>my disk like crazy the whole time.  When I ran nctest with
>the standard netcdf distribution, it took only 2 seconds to
>complete with no disk thrashing. 
>
>Any thoughts?

Only the obvious:

The netCDF implementation from the NCSA is more powerful than the one
from the Unidata Program Center (UPC) because it can handle both UPC
netCDF files and NCSA HDF files.  It appears, however, to be less
efficient than the UPC implementation at handling UPC netCDF files.

Looks like a classical power vs. efficiency tradeoff.

--------
Steve Emmerson   <address@hidden>