Core Async Stepdown Implementation

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    • Storage Engines - Foundations
    • 1,082.189
    • SE Foundations - 2026-07-07, SE Foundations - 2026-07-21, SE Foundations - 2026-08-04
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      Summary

      Build the core asynchronous step-down logic in WiredTiger to handle concurrent reads and writes during the step-down process.

      Motivation

      During a step-down, WiredTiger must transition from read-write to read-only mode without blocking or corrupting in-flight CRUD cursor operations. This ticket covers the core async step-down path for standard cursor operations (insert, update, remove, search, scan).

      Scope

      This ticket covers:
      - Core async read and write logic during the step-down transition
      - CRUD cursor operations (insert, update, remove, search, scan) running concurrently with step-down

      This ticket explicitly excludes:
      - Fast truncate support (future sprint)
      - Prepared transaction support (Sprint 2)

      Definition of Done

      • Core async read and write logic is fully supported during the step-down transition
      • CRUD cursor operations complete correctly or return a well-defined error when a step-down occurs concurrently
      • Existing Python and C test suites pass with the new logic enabled

            Assignee:
            Sid Mahajan
            Reporter:
            Sid Mahajan
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              Created:
              Updated:
              Resolved: