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Data transfer rate?

I am wondering if anyone has compared the data transfer rate for reading/
writing netCDF files to the rate obtainable with standard Fortran of C
files on various machines?  In other words, what is the overhead one
pays for going through netCDF instead of a regular file when you need
to work _mostly_ with reasonably large chunks of data and occasionally
with smaller structures stored in the same file?

Thanks in advance for any info.

-- 
David Bernholdt                 bernhold@xxxxxxxxxxx
Quantum Theory Project          bernhold@ufpine.bitnet
University of Florida
Gainesville, FL  32611          904/392 6365