TIERED HASHING FOR DATA ACCESS

摘要

A memory for access by a program being executed by a programmable control device includes a data access structure stored in the memory, the data access structure including a first and a second index structure (each having a plurality of entries) together forming a tiered index. At least one entry in the first structure indicates an entry in the second structure. The number of entries in the second structure being dynamically changeable. A method for building a tiered index structure includes building a first-level index structure having a predetermined number of entries, building a second-level index structure having a dynamic number of entries, and establishing a link between an entry in the first-level index structure and an entry in the second-level index structure.