Database Architecture Centralized databases One to a few cores,shared memory ■Client-server, One server machine executes work on behalf of multiple client machines. Parallel databases Many core shared memory ·Shared disk ·Shared nothing Distributed databases Geographical distribution Schema/data heterogeneity Database System Concepts-7th Edition 1.28 ©Silberscha乜，Korth and SudarshanDatabase System Concepts - 7 1.28 ©Silberschatz, Korth and Sudarshan th Edition Database Architecture ▪ Centralized databases • One to a few cores, shared memory ▪ Client-server, • One server machine executes work on behalf of multiple client machines. ▪ Parallel databases • Many core shared memory • Shared disk • Shared nothing ▪ Distributed databases • Geographical distribution • Schema/data heterogeneity