Re: [netcdf-hdf] what the heck is fletcher32 all about, anyway?

Ed,

Here is some documentation on Fletcher32 http://www.hdfgroup.uiuc.edu/RFC/HDF5/ARCHIVE/H5checksum/

This document describes the final design and implementation

http://www.hdfgroup.uiuc.edu/RFC/HDF5/ARCHIVE/H5checksum/EDC_spec.htm

Checksum is ON by default, i.e read operation will fail, but there is an API that allows you to disable checksum and get data back.

Elena

At 8:25 AM -0700 2/21/08, Ed Hartnett wrote:
Howdy Guys!

With the release of HDF5 1.8.0 I am taking a spin through the netCDF-4
documentation...

I realize that there is very little said about the fletcher32
filter. Because I really don't know anything about it.

I know you can turn it on with netCDF-4! But I don't know why you
would want to.

In the HDF5 docs I find very little, only that this is the "Fletcher32
checksum filter."

What happens if the checksum doesn't add up when reading the data?

Thanks!

Ed

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