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