Timestamp synchronization for queries to database portions in nodes that have independent clocks in a parallel computer system

摘要

A parallel computer system has multiple nodes that have independent clocks, where the different nodes may include different database portions that are referenced by a query. A timestamp parameter in a query is synchronized across the different nodes that are referenced by the query to assure the timestamps in the different nodes are consistent with each other notwithstanding the independent clocks used in each node. As a result, a database may be scaled to a parallel computer system with multiple nodes in a way that assures the timestamps for different nodes referenced during a query have identical values.