Evolution and implementations of the RAP database machine

The article presents the evolution of the RAP. 1, RAP. 2, and RAP. 3 database architectures and discusses various implementations carried out to date. The RAP database machine has evolved from a fixed head disk based SIMD architecture into one that is an MIMD architecture and optimized around solid state bulk memories. With the dynamic and order preserving data space partitioning strategy, binary relational algebra and projection operation complexity has been reduced to a linear order. Its tagging based universal language has enabled various system implementations such as multimodel support, integrated text retrieval capabilities, and security and integrity control.