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  1. Core Server
  2. SERVER-16632

Change WiredTiger index key format to no longer use BSON

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    Details

    • Type: Improvement
    • Status: Closed
    • Priority: Critical - P2
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 2.8.0-rc5
    • Component/s: Indexing, Storage
    • Labels:
      None
    • Backwards Compatibility:
      Major Change

      Description

      Change index key format to no longer use BSON in WiredTiger.
      Benefits include:

      • much faster key comparison
      • reduced storage size for indexes
      • take much better advantage of WT key prefix compression
      • no longer require custom collator, which means stock WT tools like repair work with no modification

      As this is an on-disk format change, indexes created before this change with WT will no longer be usable without running:
      mongod --storageEngine wiredTiger --repair

        Attachments

          Issue Links

          is depended on by

          Improvement - An improvement or enhancement to an existing feature or task. SERVER-16604 Improve integration with rocks

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

          Task - A task that needs to be done. DOCS-4664 Document user-facing changes related to WT index format change

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

          Bug - A problem which impairs or prevents the functions of the product. SERVER-16762 Loss of type information for covered queries in WiredTiger

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

          Bug - A problem which impairs or prevents the functions of the product. SERVER-16975 UnsupportedFormat fatal assertion in wiredTiger following

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

          Bug - A problem which impairs or prevents the functions of the product. SERVER-16916 RecordId might be inserted more than once with unique index and dupsAllowed == true

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

            Activity

              People

              Assignee:
              redbeard0531 Mathias Stearn
              Reporter:
              pasette Daniel Pasette
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                Dates

                Created:
                Updated:
                Resolved: