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  1. Lustre
  2. LU-19298

Improve PFL handling in LOD / LOV layer

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Details

    • Improvement
    • Resolution: Unresolved
    • Major
    • None
    • Lustre 2.17.0
    • None
    • Any recent Lustre server software stack
    • 3
    • 9223372036854775807

    Description

      While working on EC I found working on the LOD layer a challenge. The code to handle moving between struct lov_user_md and struct lod_layout_compnent was redone several times independent of each other. This means PFL behavior was implemented inconsistently. For example adding a component doesn't support a new component that has specific OST selection.

      The second improvement is moving ldo_comp_entries from a large array to a Xarray. This makes management of layout changes much easier. Another benefit is that the Xarray support multi-tiering. This means we can 'link' a parity component to a data component.

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          is related to

          New Feature - A new feature of the product, which has yet to be developed. LU-10911 FLR2: Erasure coding

          • Minor - Minor loss of function, or other problem where easy workaround is present.
          • In Progress

          Improvement - An improvement or enhancement to an existing feature or task. LU-18461 Lustre join file re-implementation

          • Minor - Minor loss of function, or other problem where easy workaround is present.
          • Open

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              simmonsja James A Simmons
              simmonsja James A Simmons
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                Created:
                Updated: