The rollback to stable operation depends on the aggregated
timestamps that are stored as part of the checkpoint and in the
internal pages of the tree. This change adjusts/corrects the
aggregation of both start/stop durable timestamps.
Along with aggregation support fixes, the rollback to stable
is modified to check for durable start/stop timestamp while
deciding the visibility of the value.
Co-authored-by: Chenhao Qu <email@example.com> | 20 Mar 20 01:03 UTC
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