Reference Book Principles of Distributed Database System Chapters 4. Distributed DBMS Architecture 5. Distributed Database Design 7.5 Layers of Query Processing Preethi Vishwanath Week 2 : 5 th September 2006 – 12 th September 2006

Comparison of Replication Alternatives Possible application Realistic Possible Application Reality Low High Very High Reliability Easy Difficult Moderate Concurrency Control Difficulty Same Easy or nonexistent Directory Management Difficulty Same Easy Query Processing Partitioning Partial Replication Full Replication