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Diffstat (limited to 'libraries/zfec/README')
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diff --git a/libraries/zfec/README b/libraries/zfec/README new file mode 100644 index 0000000000..93f3d9a02b --- /dev/null +++ b/libraries/zfec/README @@ -0,0 +1,25 @@ +This package implements an "erasure code", or "forward error correction code". + +You may use this package under the GNU General Public License, version 2 or, +at your option, any later version. You may use this package under the +Transitive Grace Period Public Licence, version 1.0. (You may choose to use +this package under the terms of either licence, at your option.) See the file +COPYING.GPL for the terms of the GNU General Public License, version 2. See +the file COPYING.TGPPL.html for the terms of the Transitive Grace Period +Public Licence, version 1.0. + +The most widely known example of an erasure code is the RAID-5 algorithm which +makes it so that in the event of the loss of any one hard drive, the stored +data can be completely recovered. The algorithm in the zfec package has a +similar effect, but instead of recovering from the loss of only a single +element, it can be parameterized to choose in advance the number of elements +whose loss it can tolerate. + +This package is largely based on the old "fec" library by Luigi Rizzo et al., +which is a mature and optimized implementation of erasure coding. The zfec +package makes several changes from the original "fec" package, including +addition of the Python API, refactoring of the C API to support zero-copy +operation, a few clean-ups and optimizations of the core code itself, and the +addition of a command-line tool named "zfec". + +This package requires pysetuptools, pyutil and darcsver. |