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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:45:59 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:45:59 +0000 |
commit | 19fcec84d8d7d21e796c7624e521b60d28ee21ed (patch) | |
tree | 42d26aa27d1e3f7c0b8bd3fd14e7d7082f5008dc /doc/dev/osd_internals/erasure_coding/jerasure.rst | |
parent | Initial commit. (diff) | |
download | ceph-upstream/16.2.11+ds.tar.xz ceph-upstream/16.2.11+ds.zip |
Adding upstream version 16.2.11+ds.upstream/16.2.11+dsupstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'doc/dev/osd_internals/erasure_coding/jerasure.rst')
-rw-r--r-- | doc/dev/osd_internals/erasure_coding/jerasure.rst | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/doc/dev/osd_internals/erasure_coding/jerasure.rst b/doc/dev/osd_internals/erasure_coding/jerasure.rst new file mode 100644 index 000000000..27669a0b2 --- /dev/null +++ b/doc/dev/osd_internals/erasure_coding/jerasure.rst @@ -0,0 +1,33 @@ +=============== +jerasure plugin +=============== + +Introduction +------------ + +The parameters interpreted by the jerasure plugin are: + +:: + + ceph osd erasure-code-profile set myprofile \ + directory=<dir> \ # plugin directory absolute path + plugin=jerasure \ # plugin name (only jerasure) + k=<k> \ # data chunks (default 2) + m=<m> \ # coding chunks (default 2) + technique=<technique> \ # coding technique + +The coding techniques can be chosen among *reed_sol_van*, +*reed_sol_r6_op*, *cauchy_orig*, *cauchy_good*, *liberation*, +*blaum_roth* and *liber8tion*. + +The *src/erasure-code/jerasure* directory contains the +implementation. It is a wrapper around the code found at +`https://github.com/ceph/jerasure <https://github.com/ceph/jerasure>`_ +and `https://github.com/ceph/gf-complete +<https://github.com/ceph/gf-complete>`_ , pinned to the latest stable +version in *.gitmodules*. These repositories are copies of the +upstream repositories `http://jerasure.org/jerasure/jerasure +<http://jerasure.org/jerasure/jerasure>`_ and +`http://jerasure.org/jerasure/gf-complete +<http://jerasure.org/jerasure/gf-complete>`_ . The difference +between the two, if any, should match pull requests against upstream. |