Date: Wed, 22 Aug 2018 21:45:59 +0000 (UTC) From: Sunpoet Po-Chuan Hsieh <sunpoet@FreeBSD.org> To: ports-committers@freebsd.org, svn-ports-all@freebsd.org, svn-ports-head@freebsd.org Subject: svn commit: r477841 - head/converters/py-zfec Message-ID: <201808222145.w7MLjxIN033618@repo.freebsd.org>
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Author: sunpoet Date: Wed Aug 22 21:45:59 2018 New Revision: 477841 URL: https://svnweb.freebsd.org/changeset/ports/477841 Log: Update pkg-descr and WWW Modified: head/converters/py-zfec/pkg-descr Modified: head/converters/py-zfec/pkg-descr ============================================================================== --- head/converters/py-zfec/pkg-descr Wed Aug 22 21:45:53 2018 (r477840) +++ head/converters/py-zfec/pkg-descr Wed Aug 22 21:45:59 2018 (r477841) @@ -1,10 +1,18 @@ -A fast erasure codec which can be used with the command-line, C, -Python, or Haskell. +The zfec package implements an "erasure code", or "forward error correction +code". -Fast, portable, programmable erasure coding a.k.a. "forward error -correction": the generation of redundant blocks of information such -that if some blocks are lost then the original data can be recovered -from the remaining blocks. The zfec package includes command-line -tools, C API, Python API, and Haskell API. +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. -WWW: https://pypi.org/project/zfec/ +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". + +WWW: https://github.com/tahoe-lafs/zfec
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