Implementation of DATABASE MANAGEMENT SYSTEMS

Krithi Ramamritham

WHY DATABASES?(WHY NOT FILE SYSTEMS?)

• AVOIDING REDUNDANCY

• ENSURING CONSISTENCY• IMPROVING EASE OF ACCESS TO DATA

• ALLEVIATING–CONCURRENCY–INTEGRITY–SECURITY

PROBLEMS

Why should you learn about DBMS?

• Databases are everywhere– Banks, industry, personnel, libraries– CAD/CAM– Network switches, web servers – Sensors– Handheld devices

Technology and Usage Trends• A large %age of the data is “outside the box”• Heterogeneity

– A typical company has 100’s of DBs inter operating within the company

– Automobiles of tomorrow will be driven by information rather than by humans

– different vendors, platforms, needs• Data Warehousing and mining

– a db never forgets, it knows more than you think

• All the data All the time• Application - aware information management - mobility - enterprise management

- E-commerce - Workflows

Why should you learn about DBMSImplementation?

• Database implementations techniques provide valuable lessons in key concepts of– query processing– concurrency and recovery– storage structures– performance tuning

GOAL OF COURSE

• STUDY DATABASE SYSTEMS FROM A “SYSTEMS PERSPECTIVE” • UNDERSTAND THE “INNARDS” OF A DBMS

• KEEP - IMPLIMENTABILITY- COST- RESOURCES- PERFORMANCE

IN THE FOREFRONT

COURSE CONTENTS• REVIEW OF RELATIONAL MODEL

• STORAGE AND FILE STRUCTURES

• EFFICIENCY OF ACCESS

– INDEXING, HASHING

• QUERY PROCESSING & Optimization

• TRANSACTIONS– CONCURRENCY CONTROL

– RECOVERY

– COMMIT PROTOCOLS

• DBMS FOR DIFFERENT ARCH.

– PARALLEL

– DISTRIBUTED– CLIENT-SERVER– MAIN MEMORY

– mobile– e-commerce– sensor databases – data warehouses

cont....

WHAT YOU NEED TO DO

1. Participate in in-class discussions

-- lectures

-- tutorials (code walk-thrus)

2. Do quizzes (in-class) n-1/n

3. Do mid-sem exam

4. Do Project/homework/assignments

5. Write final exam