The AdOC (Adaptive Online
Compression) library is a set of functions that implements
the AdOC algorithm of Jeannot, Knutsson and Bjorkmann. It
enables an efficent way to transmit files and data across
the network using dynamic compression and adapting
compression level to the environment.
Experimental results show that
for transmitting ASCII files or binaries on networks up to
100Mbps, AdOC outperforms any other method (ftp, scp,
compression-transmission-uncompression, etc...).
Successfully ported on LINUX (32/64 bits), Solaris/SunOS,
MacOS/darwin, IBM AIX, SGI IRIX, FreeBSD, Dec-Alpha OSF,
Cygwin.
It has been easily incorporated into NetSolve thanks to its simple API
close to the read/write system call. It improves the
performance of this PSE by a factor of 5 on certain kind
of data over Internet, while there is no slowdown when
dealing with high speed network.
New features: solve the
compression divergence problem, work on Gbit LAN with very
few degradation (15 micro- seconds), improve latency for
small messages (no difference with the POSIX read/write),
no degradation for random/compressed data.
A PDF presentation is available here.
This library is available under LGPL license. Download the AdOC library (ver. 2.1 --
November 3 2004).