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  1. Lustre
  2. LU-12025

Adding OST may cause EIO - delay activation of new OSTs on existing filesystem

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    • 9223372036854775807

    Description

      During OST addition,
      1. MDT gets configuration refreshment first.
      2. Then MDT get create request from the client, might allocate the object the new OST, then reply to the client.
      3. If client does not refresh its configuration yet, then do I/O with the EA, it might get EIO because it does not know the OST.

      So it probably needs add version to the config log to avoid this happen.

      This happens quite often in cloud environment. though not sure if there is duplicate ticket already.

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          is related to

          New Feature - A new feature of the product, which has yet to be developed. LU-12036 Add 'no_create' mount option to create new OSTs inactive

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

          Improvement - An improvement or enhancement to an existing feature or task. LU-17299 DNE3: disable new regular file creation on MDTs mounted with 'no_create'

          • Major - Major loss of function.
          • Open

          Improvement - An improvement or enhancement to an existing feature or task. LU-12998 DNE3: tunable to disable directory creation on MDT

          • Major - Major loss of function.
          • Resolved

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              adilger Andreas Dilger
              di.wang Di Wang
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