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

[Elena Pourmal]

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
>
>--
>Ed Hartnett  -- ed at unidata.ucar.edu
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