Problems with right-shift in Gear rollsum.

[dbaarda]

This implementation copies another implementation that uses a right-shift in its Gear rollsum. This has problems I reported here;

https://github.com/ronomon/deduplication/issues/7

[nlfiedler]

I see that Joran closed the original issue, but regardless, I'm going to keep this open so that I can think about it more. I did not research this topic at all, merely read the paper once and translated the readily available implementation by Joran. Thank you for thinking about this and reporting it.

[dbaarda]

In case you are interested, I've also just finished some testing and analysis of chunker algorithms inspired by FastCDC here;

https://github.com/dbaarda/rollsum-chunking/blob/master/RESULTS.rst

The insights gained from this prompted me to post some other observations and recommendations when using that implementation of FastCDC here;

https://github.com/ronomon/deduplication/issues/8