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  1. WiredTiger
  2. WT-7381

Cache btree's ckptlist between checkpoints

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Details

    • Improvement
    • Status: Closed
    • Major - P3
    • Resolution: Fixed
    • None
    • WT10.0.1, 4.4.7, 5.0.0-rc0
    • None
    • None
    • 8
    • Storage - Ra 2021-04-19, Storage - Ra 2021-05-03, Storage - Ra 2021-05-17, Storage - Ra 2021-05-31
    • v4.2

    Description

      First part of work tracked from WT-7285:

      Investigate how we are going to store the checkpoint information, I like the idea proposed by Susan LoVerso, so would start with keeping 1 (or 2) ckpt structures around attached to the dhandle. The cached ckpt structures will be used instead of reparsing the strings, and then updated as new checkpoints get created. Let's start with the common (non-backup) path. In the debug build, we will still parse and create ckpt structures and assert if the structures created from metadata do not match the one we hold in the cache. We will need to figure exactly how many ckpt structures to keep around, including handling checkpoint deletion.

      Attachments

        Issue Links

          causes

          Improvement - An improvement or enhancement to an existing feature or task. WT-7517 Code cleanup: Introduce a is-part-of-ckpt-array field

          • Major - P3 - Major loss of function.
          • Closed

          Improvement - An improvement or enhancement to an existing feature or task. WT-7521 Remove excess ckplist invalidations

          • Major - P3 - Major loss of function.
          • Closed

          Improvement - An improvement or enhancement to an existing feature or task. WT-7524 Refactor functions to obtain checkpoint list; Clear delete on skipping checkpoints

          • Major - P3 - Major loss of function.
          • Closed
          is duplicated by

          Improvement - An improvement or enhancement to an existing feature or task. WT-7421 Handle backup checkpoints when maintaining most recent checkpoints

          • Major - P3 - Major loss of function.
          • Closed

          Improvement - An improvement or enhancement to an existing feature or task. WT-7422 Find and account for all code paths that invalidate cached checkpoint information

          • Major - P3 - Major loss of function.
          • Closed
          related to

          Bug - A problem which impairs or prevents the functions of the product. WT-5479 Checkpoint schema lock can cause long stalls in command execution on systems with many active data handles

          • Major - P3 - Major loss of function.
          • Closed

          Improvement - An improvement or enhancement to an existing feature or task. WT-7285 Maintain Most Recent Checkpoint information

          • Major - P3 - Major loss of function.
          • Closed

          Activity

            People

              sulabh.mahajan@mongodb.com Sulabh Mahajan
              sulabh.mahajan@mongodb.com Sulabh Mahajan
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              Dates

                Created:
                Updated:
                Resolved: