Patent ID: 6766418
Filing Date: 2004-07-20
Classification: G06F

Abstract:
A method for providing access to data, the method comprising the steps of:receiving a data access request containing a first data reference; obtaining a history cache entry from a history cache based on the first data reference; obtaining a partition cache entry from a partition cache based on the first data reference; performing a data access operation on the data as specified in the data access request using a second data reference obtained from one of the history cache entry and the partition cache entry; the history cache including a plurality of history cache entries, each history cache entry containing a mapping between an open systems reference to a location in the data and a non-open systems reference to a location in the data, and each history cache entry being obtained from a former data access operation to the data; and wherein the step of obtaining a history cache entry includes the step of comparing the first data reference to each history cache entry in the history cache to select a selected history cache entry that is closest to the first data reference.