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Re: [address@hidden: netCDF opinion]
- Subject: Re: [address@hidden: netCDF opinion]
- Date: Wed, 20 Jun 2001 14:43:59 -0600
Bill,
> Thanks...I'll just unthread it...How does netCDF get its speed.
> Is the file in fact memory mapped after the create steps?
NetCDF gets its speed from doing its own buffering and from handling
arrays as arrays instead of as single values. The version we
distribute is not memory mapped, although Glenn Davis did write a
memory-mapped version available from the URL in this email:
http://www.unidata.ucar.edu/glimpse/netcdf/2480
However, it didn't actually speed things up much and in some cases
actually made the performance significantly worse than the standard
buffered version. You could try it to see if it improves things ...
--Russ
_____________________________________________________________________
Russ Rew UCAR Unidata Program
address@hidden http://www.unidata.ucar.edu
