xdelta 3.0e review

xdelta is a library and application for computing and applying file deltas

License: GPL (GNU General Public License) File size: 0K Developer: Josh MacDonald

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xdelta is a library and application for computing and applying file deltas. xdelta project features VCDIFF encoding and decoding.

Xdelta was designed and implemented by Joshua MacDonald. The delta algorithm is based on the Rsync algorithm, though implementation and interface considerations leave the two programs quite distinct. The Rsync algorithm is due to Andrew Tridgell and Paul Mackerras.

To compile and install Xdelta, read the instructions in the INSTALL file. Once you have done this, you should at least read the first few sections of the documentation. It is available in info format. All documentation is located in the doc/ subdirectory.

Options:

-0..9 Set the zlib compression level. Zero indicates no
compression. Nine indicates maximum compression.

-h, --help
Print a short help message and exit.

-q, --quiet
Quiet. Surpresses several warning messages.

-v, --version
Print the Xdelta version number and exit.

-V, --verbose
Verbose. Prints a bit of extra information.

-n, --noverify
No verify. Turns off MD5 checksum verification of the
input and output files.

-m=SIZE, --maxmem=SIZE
Set an upper bound on the size of an in-memory page
cache. For example, --maxmem=32M will use a 32 megabyte
page cache.

-s=BLOCK_SIZE
Set the block size, unless it was hard coded (20% speed
improvement). Should be a power of 2.

-p, --pristine
Disable the automatic decompression of gzipped
inputs, to prevent unexpected differences in the
re-compressed content.

What's New in This Release:
This release contains bug fixes and performance improvements.
It also features VCDIFF encoding.