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* The parameters come from the erasure code profile * Add a note about the upstream submodules gf-complete / jerasure Signed-off-by: Loic Dachary <loic@dachary.org>
34 lines
1.2 KiB
ReStructuredText
34 lines
1.2 KiB
ReStructuredText
===============
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jerasure plugin
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===============
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Introduction
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------------
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The parameters interpreted by the jerasure plugin are:
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::
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ceph osd erasure-code-profile set myprofile \
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directory=<dir> \ # plugin directory absolute path
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plugin=jerasure \ # plugin name (only jerasure)
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k=<k> \ # data chunks (default 2)
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m=<m> \ # coding chunks (default 2)
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technique=<technique> \ # coding technique
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The coding techniques can be chosen among *reed_sol_van*,
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*reed_sol_r6_op*, *cauchy_orig*, *cauchy_good*, *liberation*,
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*blaum_roth* and *liber8tion*.
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The *src/erasure-code/jerasure* directory contains the
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implementation. It is a wrapper around the code found at
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`https://github.com/ceph/jerasure <https://github.com/ceph/jerasure>`_
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and `https://github.com/ceph/gf-complete
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<https://github.com/ceph/gf-complete>`_ , pinned to the latest stable
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version in *.gitmodules*. These repositories are copies of the
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upstream repositories `https://bitbucket.org/jimplank/jerasure
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<https://bitbucket.org/jimplank/jerasure>`_ and
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`https://bitbucket.org/jimplank/gf-complete
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<https://bitbucket.org/jimplank/gf-complete>`_ . The difference
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between the two, if any, should match pull requests against upstream.
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