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  1. WiredTiger
  2. WT-5478

Insert records directly into history store without a txn

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Details

    • Improvement
    • Status: Closed
    • Major - P3
    • Resolution: Fixed
    • None
    • WT10.0.0, 4.4.0-rc0, 4.7.0
    • None
    • None
    • 8
    • Storage Engines 2020-02-10

    Description

      With the current plan, if we make updates to history store, the updates are done as part of the application transaction (which means we need one of this txns open in the first place). For this plan to work, we need to put a hack into the commit/rollback code to always treat history store updates as committed.

      It will be effective to find alternatives to the above mechanism for two reasons:

      • We won't have to do the mentioned hack and treat history store updates special
      • We wont have to open a transaction if application txn is not available. We do not want to open a txn just to make history store updates because history store updates do not follow regular transaction semantics also this might interfere with implicit auto transactions that an application might end up opening.

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          is depended on by

          Bug - A problem which impairs or prevents the functions of the product. WT-5485 Fix test_hs09.py

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

          Bug - A problem which impairs or prevents the functions of the product. WT-5510 Fix test_hs01.py, test_hs06.py (test_hs_prepare_reads)

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

          Bug - A problem which impairs or prevents the functions of the product. WT-5451 Update reverse modify logic to always insert a modify into the history store

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

          Bug - A problem which impairs or prevents the functions of the product. WT-5533 Fix test_gc01.py

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

          Task - A task that needs to be done. WT-5540 Call cursor disable bulk insert on first insert to history store.

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

          Improvement - An improvement or enhancement to an existing feature or task. WT-5512 Create a new history store cursor type that inserts/deletes by directly putting updates on the page

          • 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: