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  1. Lustre
  2. LU-11918

Allow setting default file layout on root directory at mkfs time

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Details

    • Improvement
    • Resolution: Unresolved
    • Major
    • Lustre 2.17.0
    • Lustre 2.12.0, Lustre 2.13.0
    • 9223372036854775807

    Description

      It is useful to enable newer features like PFL, DoM, and FLR at format time, so that users unfamiliar with Lustre can have a default filesystem configuration that is most useful. In particular, enabling PFL for new filesystems is desirable for new releases, and if the MDT is configured with a large amount of space per inode (using e.g. "--mkfsoptions='-i 65536'" for ldiskfs, or always for ZFS) then a DoM component could be added.

      Some options for implementing this exist:

      • after formatting the MDT, when it is mounted as type ldiskfs use "lfs setstripe" to generate an xattr and write it to the ROOT/ directory using setxattr() instead of ioctl(). Allowing mkfs.lustre to accept an arbitrary layout would be most flexible.
      • have "pre-built" xattrs that are written to the ROOT/ directory at format time (either inside the kernel or from mkfs.lustre. This would likely handle most of the cases, and for expert users that know they want a different default, they can set it after mount.

      I don't think that mounting the MDT as type lustre, and then mounting a local client and using "lfs setstripe" is practical.

      Attachments

        Issue Links

          is blocked by

          Bug - A problem which impairs or prevents the functions of the product. LU-11656 "lfs getstripe" on directory does not show default root layout

          • Major - Major loss of function.
          • Resolved
          is related to

          Bug - A problem which impairs or prevents the functions of the product. LU-7723 few tests in sanity.sh fail because of STRIPES_PER_OBJ=-1

          • Trivial - Cosmetic problem like misspelt words or misaligned text.
          • Open

          Bug - A problem which impairs or prevents the functions of the product. LU-8154 Auster - move setstripe options to config variable.

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

          Task - A task that needs to be done. LU-16904 initial test script to run sanity.sh and sanityn.sh with PFL layout

          • 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-13058 Intermediate component removal (PFL/SEL)

          • Major - Major loss of function.
          • Open

          Improvement - An improvement or enhancement to an existing feature or task. LU-14274 enhance racer/file_create.sh to set striping

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

          Bug - A problem which impairs or prevents the functions of the product. LU-10465 increase default stripe size to 4MB

          • Critical - Crashes, loss of data, severe memory leak.
          • Resolved

          Bug - A problem which impairs or prevents the functions of the product. LU-12390 allow custom filesystem layout for tests

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

          Technical task - A technical task. LU-9324 sanity-pfl test 10 needs to reset the file system default layout

          • Major - Major loss of function.
          • Resolved

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              wc-triage WC Triage
              adilger Andreas Dilger
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              Dates

                Created:
                Updated: