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  1. WiredTiger
  2. WT-6845

Set session btree to HS when operating on history store

    • 5
    • Storage - Ra 2020-11-02, Storage - Ra 2020-11-16, Storage - Ra 2020-11-30

      format-stress-ppc-zseries-test failed on ~ Ubuntu 18.04 PPC

      Host: ubuntu1804-ppc-13.pic.build.10gen.cc
      Project: WiredTiger (develop)
      Commit: diff: WT-6811 Allow older readers to read behind a mixed-mode operation. (#6091)

      • Reinsert values behind a mixed mode operation into the history store with 0 start and stop timestamps.
      • Stop converting WT_TS_NONE to WT_TS_MAX in the history store search code, instead fix it up before passing it in.
      • Delete all places that we clear the history store after inserting updates as we cant guarantee ordering after inserting an update.
      • Remove now unused stat.
      • Rename update obsolete flag.
      • Ignore tombstones on the zero timestamp search cursor as that may prevent it from placing itself correctly.
      • Adding unit tests for various older reader scenarios.

      Co-authored-by: Alex Cameron <alex.cameron@10gen.com> | 28 Oct 20 00:23 UTC
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            haribabu.kommi@mongodb.com Haribabu Kommi
            xgen-evg-user Xgen-Evergreen-User
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