Patent attributes
Merging of portions of ordered event streams is disclosed. The disclosed merging of events can limit loss of order of events from streams in exchange for reduced computational load by grouping events according to a pseudo-epoch, wherein events are stored according to a scheme, even though the grouping can result reading events in a different order that that in which the events were written. However, by grouping the events, there can be fewer transitions between storage schemes when reading events than if they were read in the same order in which they were written, thereby reducing computational load. Moreover, restraints on the loss of order can be imposed by selecting a maximum progress window and generally restricting groups from comprising events two different storage schemes. Where events can be moved to archival storage, reducing storage scheme transitions can be of further benefit and speed access times of archived events.
