TR-CIS-2002-02 (6/26/2002)
Dimitre Trendafilov, Nasir Memon, Torsten Suel
Abstract
In this report we describe a tool for delta compression, i.e., the efficient encoding of a given
data set in relation to another one. Its possible applications include archiving multiple versions
of data, distribution of software updates, delta compression of backup files, or compression at
the file system level. The compressor, called zdelta, could be viewed as a modification of the
zlib compression library [4] with some additional ideas inspired by the vdelta/vcdiff tool of Vo
[5]. We also present experimental results comparing zdelta to other delta compression tools.
Additional information about zdelta, including source code and updates, is available at http://cis.poly.edu/zdelta/.