Rsync uses an own "rsync" algorithm which provides a very fast method for bringing remote files into sync. It does this by sending just the differences in the files across the link, without requiring that both sets of files are present at one of the ends of the link beforehand. At first glance this may seem impossible because the calculation of diffs between two files normally requires local access to both files.
Author: Andrew Tridgel <tridge [at] samba [dot] org>
Author: Paul Mackerras <paulus [at] cs [dot] anu [dot] edu [dot] au>
Maintainer: Rene Rebe <rene [at] t2-project [dot] org>
Remark: Does cross compile (as setup and patched in T2).
Remark: Dietlibc compatible.
Build time (on reference hardware): 20% (relative to binutils)2
Installed size (on reference hardware): 0.49 MB, 16 files
Installed files (on reference hardware): n.a.
2) Compatible with Linux From Scratch's "Standard Build Unit" (SBU).