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  1. WiredTiger
  2. WT-3435

Lookaside eviction should be able to save unstable updates

    • Type: Icon: Bug Bug
    • Resolution: Fixed
    • Priority: Icon: Major - P3 Major - P3
    • 3.6.0-rc0, WT3.0.0
    • Affects Version/s: None
    • Component/s: None
    • Labels:
    • Storage 2017-08-21, Storage 2017-09-11, Storage 2017-10-02, Storage 2017-10-23

      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.

            michael.cahill@mongodb.com Michael Cahill (Inactive)
            michael.cahill@mongodb.com Michael Cahill (Inactive)
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