Enable fast truncate in test/format disaggregated switch mode runs

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    • Type: Task
    • Resolution: Unresolved
    • Priority: Major - P3
    • None
    • Affects Version/s: None
    • Component/s: None
    • Storage Engines - Foundations
    • 1,218.122
    • SE Foundations - 2026-11-10
    • 1

      test/format forces debug.disagg_slow_truncate_follower on whenever disagg.mode is switch, so switch mode stress has never exercised fast truncate. Leader and follower modes do exercise it, which means the role transition case - the one most likely to break - is the one with no coverage.

      Once write conflict detection is complete, stop forcing the slow path in switch mode and burn the configuration in.

      This is the step before WT-17564, which removes the slow truncate path and its knob entirely.

            Assignee:
            Salman Javed
            Reporter:
            Jie Chen
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              Created:
              Updated: