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  1. Core Server
  2. SERVER-49856

Make DatabaseCache causally consistent through the usage of ComparableDatabaseVersion

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    Details

    • Type: Task
    • Status: Closed
    • Priority: Major - P3
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 4.7.0
    • Component/s: Sharding
    • Backwards Compatibility:
      Fully Compatible
    • Sprint:
      Sharding 2020-08-10

      Description

      Introduce a new class called say ComparableDatabaseVersion, which allows to compare two database versions that have different epoch. This class will be use as clock for the DatabaseCache (introduced by SERVER-48992) to make it causally consistent. In particular it will be use to advance the cached database entry's time as a result of a reception of StaleDatabaseVersion.

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          causes

          Bug - A problem which impairs or prevents the functions of the product. SERVER-51390 Always refresh database cache on StaleDatabaseVersion

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

          Task - A task that needs to be done. SERVER-48992 Implement database cache on top of ReadThroughCache

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

          Task - A task that needs to be done. SERVER-49189 Make the ReadThroughCache lookup send the old entry state to the lookup function

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

          Task - A task that needs to be done. SERVER-48991 Make CatalogCache causally consistent

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

            Activity

              People

              Assignee:
              tommaso.tocci Tommaso Tocci
              Reporter:
              tommaso.tocci Tommaso Tocci
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                Updated:
                Resolved: