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  1. Core Server
  2. SERVER-77703

Replace MurmurHash3 with absl::Hash if possible in oplog_applier_utils.cpp

    • Type: Icon: Task Task
    • Resolution: Fixed
    • Priority: Icon: Major - P3 Major - P3
    • 7.1.0-rc0, 7.0.0-rc6
    • Affects Version/s: None
    • Component/s: None
    • None
    • Service Arch
    • Fully Compatible
    • v7.0
    • Service Arch 2023-06-26

      MurmurHash3 is a pretty old hash function that's slow and produces low-quality hashes compared to modern alternatives like absl::Hash (CityHash). We want to replace any uses of MurmurHash3 which are for in-memory use only, as we expect this to yield quick perf wins. Hash values that are persisted to disk across restarts or sent across the network between servers are likely unsafe to change, and should be annotated with a clear explanation for why the usage requires a stable hash computation.

            Assignee:
            wenbin.zhu@mongodb.com Wenbin Zhu
            Reporter:
            dan.larkin-york@mongodb.com Dan Larkin-York
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              Created:
              Updated:
              Resolved: