Status: IN
Checkpoints, batch commits, and segment rotations all bypass the configured sync mode by calling fsync unconditionally, creating a two-tier durability model where structural WAL operations are always durable even when individual record writes are not.
Four beliefs establish that force=True fsync is consistently applied at WAL state-transition boundaries but not at individual write boundaries
Depends on (SL): wal-checkpoint-forces-fsync, wal-batch-always-fsyncs, rotation-always-fsyncs, force-true-bypasses-sync-mode