remove ceph code

[stor4nfv.git] / src / ceph / doc / rados / operations / erasure-code-isa.rst

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-=======================
-ISA erasure code plugin
-=======================
-
-The *isa* plugin encapsulates the `ISA
-<https://01.org/intel%C2%AE-storage-acceleration-library-open-source-version/>`_
-library. It only runs on Intel processors.
-
-Create an isa profile
-=====================
-
-To create a new *isa* erasure code profile::
-
-        ceph osd erasure-code-profile set {name} \
-             plugin=isa \
-             technique={reed_sol_van|cauchy} \
-             [k={data-chunks}] \
-             [m={coding-chunks}] \
-             [crush-root={root}] \
-             [crush-failure-domain={bucket-type}] \
-             [crush-device-class={device-class}] \
-             [directory={directory}] \
-             [--force]
-
-Where:
-
-``k={data chunks}``
-
-:Description: Each object is split in **data-chunks** parts,
-              each stored on a different OSD.
-
-:Type: Integer
-:Required: No.
-:Default: 7
-
-``m={coding-chunks}``
-
-:Description: Compute **coding chunks** for each object and store them
-              on different OSDs. The number of coding chunks is also
-              the number of OSDs that can be down without losing data.
-
-:Type: Integer
-:Required: No.
-:Default: 3
-
-``technique={reed_sol_van|cauchy}``
-
-:Description: The ISA plugin comes in two `Reed Solomon
-              <https://en.wikipedia.org/wiki/Reed%E2%80%93Solomon_error_correction>`_
-              forms. If *reed_sol_van* is set, it is `Vandermonde
-              <https://en.wikipedia.org/wiki/Vandermonde_matrix>`_, if
-              *cauchy* is set, it is `Cauchy
-              <https://en.wikipedia.org/wiki/Cauchy_matrix>`_.
-
-:Type: String
-:Required: No.
-:Default: reed_sol_van
-
-``crush-root={root}``
-
-:Description: The name of the crush bucket used for the first step of
-              the ruleset. For intance **step take default**.
-
-:Type: String
-:Required: No.
-:Default: default
-
-``crush-failure-domain={bucket-type}``
-
-:Description: Ensure that no two chunks are in a bucket with the same
-              failure domain. For instance, if the failure domain is
-              **host** no two chunks will be stored on the same
-              host. It is used to create a ruleset step such as **step
-              chooseleaf host**.
-
-:Type: String
-:Required: No.
-:Default: host
-
-``crush-device-class={device-class}``
-
-:Description: Restrict placement to devices of a specific class (e.g.,
-              ``ssd`` or ``hdd``), using the crush device class names
-              in the CRUSH map.
-
-:Type: String
-:Required: No.
-:Default:
-
-``directory={directory}``
-
-:Description: Set the **directory** name from which the erasure code
-              plugin is loaded.
-
-:Type: String
-:Required: No.
-:Default: /usr/lib/ceph/erasure-code
-
-``--force``
-
-:Description: Override an existing profile by the same name.
-
-:Type: String
-:Required: No.
-