Introduction to OS

1. PARALLEL SYSTEM

1.1. ADVANTAGE

1.1.1. INCREASED THROUGHPUT

1.1.2. ECONOMIAL

1.1.3. INCREASED RELIABILITY

1.1.3.1. GRACEFUL DEGRADATION

1.1.3.2. FAIL-SOFT SYSTEM

2. SYMMETRIC MULTIPROCESSING

2.1. No authority level

2.2. Run in parallel

3. ASYMMETRIC MULTIPROCESSING

3.1. MASTER PROCESSOR

3.2. SLAVE PROCESSOR

4. Objective of OS

4.1. Convenience

4.2. Efficientcy

4.3. Ability to evolve

5. Evolution of OS

5.1. SERIAL PROCESSING

5.1.1. EARLIER COMPUTER

5.1.2. PROBLEM

5.2. SIMPLE BATCH SYSTEM

5.2.1. EARLIER COMPUTER

5.2.2. MONITOR

5.3. MULTIPROGRAMMED BATCH SYSTEM

5.4. TIME SHARING SYSTEM

5.4.1. Process time is shared among multiple users

6. REAL-TIME SYSTEM

6.1. HARD REAL-TIME

6.2. SOFT REAL-TIME

6.3. CHARACTERISTIC

6.3.1. DETERMINISM

6.3.2. RESPONSIVENESS

6.3.3. USER CONTROL

6.3.4. RELIABILITY

6.3.5. FAIL-SOFT OPERATION