Compute and set the document hash (h) on the primary for delete oplog entries

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    • Type: Task
    • Resolution: Unresolved
    • Priority: Major - P3
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    • Affects Version/s: None
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    • Storage Execution
    • Storage Execution 2026-06-22, Storage Execution 2026-07-06, Storage Execution 2026-07-20
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      Context

      We need to compute the document hash on the primary and populate the h field on the insert oplog entry during steady-state replication. SERVER-128506 only produces h on the primary.

      The hash is computed over the document affected by the op: the post-image for updates and the pre-image for deletes. Use SHA-256 to start.

      Acceptance criteria

      • Deletes on the primary set h when the feature flag is on with a hash of the document's pre-image.
      • When the feature flag is off, h is not set on deletes.
      • We unit-test the above two points.

            Assignee:
            Elise Zhu
            Reporter:
            Stephanie Eristoff
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              Created:
              Updated: