zmanda/amanda — pull request #59 by opoplawski (2014-07-11 15:41:06+00:00)
Title: Use a binned histogram by dump size to compute incremental estimates.

Speaking of better estimates:

The compression rate on incremental backups tends to vary heavily based
on the size of the incremental. This method computes the compression
rate much better by only basing the average on similar sizes from the
past.