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  1. Lustre
  2. LU-6179

Lock ahead - Request extent locks from userspace

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Details

    • New Feature
    • Resolution: Fixed
    • Major
    • Lustre 2.11.0
    • None
    • 17290

    Description

      At the recent developers conference, Jinshan proposed a different method of approaching the performance problems described in LU-6148.

      Instead of introducing a new type of LDLM lock matching, we'd like to make it possible for user space to explicitly request LDLM locks asynchronously from the IO.

      I've implemented a prototype version of the feature and will be uploading it for comments. I'll explain the state of the current version in a comment momentarily.

      Attachments

        1. anl_mpich_build_guide.txt
          18 kB
        2. lockahead_ladvise_mpich_patch
          30 kB
        3. sle11_build_tools.tar.gz
          2.48 MB
        4. LockAhead-TestReport.txt
          1.36 MB
        5. LUSTRE-LockAhead-140417-1056-170.pdf
          64 kB
        6. cug paper.pdf
          714 kB
        7. mmoore cug slides.pdf
          1.15 MB
        8. LockAheadResults.docx
          516 kB

        Issue Links

          is blocking

          Bug - A problem which impairs or prevents the functions of the product. LU-9962 Possible file size glimpse issue

          • 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-10136 sanity test_255c: Ladvise test11 failed, 255

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

          Bug - A problem which impairs or prevents the functions of the product. LUDOC-379 Document ladvise lockahead feature

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

          Bug - A problem which impairs or prevents the functions of the product. LU-6181 Fix lock contention discovery to disable extend lock growth

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

          New Feature - A new feature of the product, which has yet to be developed. LU-11618 implement ladvise rpc_size for optimized performance

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

          New Feature - A new feature of the product, which has yet to be developed. LU-6148 Strided lock proposal - Feature proposal for 2.8

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

          Improvement - An improvement or enhancement to an existing feature or task. LU-7225 change ladvise wire protocol for lockahead and future usage

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

          Activity

            People

              paf Patrick Farrell (Inactive)
              paf Patrick Farrell (Inactive)
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              Dates

                Created:
                Updated:
                Resolved: