Session – 5 DISTRIBUTED DATABASE ARCHITECTURE Matakuliah: M0184 / Pengolahan Data Distribusi Tahun: 2005 Versi:

OBJECTIVES MODELS FOR DISTRIBUTED DBMS DISTRIBUTED DATABASE ARCHITECTURE

Models for Distributed DBMS

Autonomy Autonomy refers to the distribution of control not data. It indicates the degree to which individual DMBS can operate independently Distribution Distribution dimension refers to data. Considering distribution of data over multiple sites. Heterogeneity Heterogeneity may occur in various forms of distributed system, ranging from hardware heterogeneity and differences in networking protocols to variation in data manager

Distributed DBMS Architecture Client Server Peer-to-peer Distributed System Multi Databases Architecture (Heterogeneous Distributed System)

Client Server

Peer-To-Peer Distributed System ES1ES2ESn GCS LCS1 LIS1 LCS2 LIS2 LCSn LISn Refer from three-tier database architecture LIS : Local Internal Schema LCS : Local Conceptual Schema GCS : Global Conceptual Schema ES : External Schema

Multi Databases Architecture (Heterogeneous Distributed System) GES1GES2GES3 LES11LES12LES13LESn1LESn2LESn3 LIS1 LCS1 GCS LISn LCSn