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  1. Core Server
  2. SERVER-32608

Make secondaries refresh their database metadata from the persisted database cache

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    • Type: Icon: Task Task
    • Resolution: Fixed
    • Priority: Icon: Major - P3 Major - P3
    • 3.7.4
    • Affects Version/s: 3.7.1
    • Component/s: Sharding
    • Labels:
    • Fully Compatible
    • Sharding 2018-03-12, Sharding 2018-04-09

      We can do this by creating a 'config.cache.databases' collection on shards, and persisting the databaseVersion in it.

      We also need to persist a 'refreshing' flag into the entry in 'config.cache.databases' when starting a refresh, and a 'refreshing=false' and 'lastDatabaseVersionRefreshed=<DatabaseVersion' flags on completing the refresh, and add OpObservers so that the secondary will invalidate its in-memory cache entry for the database.

            Assignee:
            janna.golden@mongodb.com Janna Golden
            Reporter:
            randolph@mongodb.com Randolph Tan
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              Created:
              Updated:
              Resolved: