Development of a parallel database management system on the basis of open-source PostgreSQL DBMS

The paper describes the architecture and implementation of PargreSQL parallel database management system (DBMS) for distributed memory multiprocessors. PargreSQL is based upon PostgreSQL open-source DBMS and exploits partitioned parallelism. The paper is devoted to development of a parallel database management system (DBMS) by means of embedding of the parallel query execution techniques based on partitioning parallelism concept into open-source PostgreSQL DBMS. The architecture and implementation principles of the parallel DBMS for cluster computing systems are described. PostgreSQL is a subsystem of PargreSQL. The necessary modifications of the PostgreSQL subsystems are described. These modifications suppose minimal changes in the source code. The changes in data structures and algorithms are encapsulated into separate source code files that are included into the original project file structure. The usage of PargreSQL is transparent for applications. It demands minimal modifications of an application's source code. PargreSQL running on one computing node works like PostgreSQL.