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  1. WiredTiger
  2. WT-3435

Lookaside eviction should be able to save unstable updates

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Details

    • Bug
    • Status: Closed
    • Major - P3
    • Resolution: Fixed
    • None
    • 3.6.0-rc0, WT3.0.0
    • None
    • Storage 2017-08-21, Storage 2017-09-11, Storage 2017-10-02, Storage 2017-10-23

    Description

      During lookaside eviction, updates that are committed but not yet stable are included in pages written to data files. If a subsequent checkpoint includes such a page, then updates could become durable before they are stable.

      A test case for this would run with logging disabled, fix an oldest timestamp, then insert enough data to trigger lookaside eviction. Then take a checkpoint as of the pinned oldest timestamp. If the checkpoint contains any of the inserts then lookaside eviction has made changes durable too soon.

      Attachments

        Issue Links

          depends on

          Bug - A problem which impairs or prevents the functions of the product. WT-3617 lookaside with timestamps: heap-use-after-free

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

          Improvement - An improvement or enhancement to an existing feature or task. WT-3554 Extend timestamp test to trigger eviction

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

          Bug - A problem which impairs or prevents the functions of the product. WT-3406 Reconciliation is choosing reserved records for writing.

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

          Bug - A problem which impairs or prevents the functions of the product. WT-3521 Unstable updates should not be written by lookaside eviction

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

          Web Link pull request

          Activity

            People

              michael.cahill@mongodb.com Michael Cahill
              michael.cahill@mongodb.com Michael Cahill
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              Dates

                Created:
                Updated:
                Resolved: