The document discusses different types of computer system architectures. It describes single processor systems which use one CPU and multiprocessor systems which have two or more processors. Multiprocessor systems can be asymmetric, with a master-slave relationship, or symmetric, where each processor performs all tasks. The advantages of multiprocessor systems are increased throughput, economic benefits from shared resources, and improved reliability if one processor fails. The document also discusses clustered systems which connect multiple computers over a network and can be structured asymmetrically with one host in hot-standby mode or symmetrically with all hosts running applications and monitoring each other.

1. Video Lecture and E-Content Created by
R.D.SIVAKUMAR,M.Sc.,M.Phil.,M.Tech.,
Assistant Professor of Computer Science &
Assistant Professor and Head, Department of M.Com.(CA),
Ayya Nadar Janaki Ammal College,
Sivakasi – 626 124.
Mobile: 099440-42243
e-mail : sivamsccsit@gmail.com website: www.rdsivakumar.blogspot.in
COMPUTER SYSTEM ARCHITECTURE

2. According to the number of general purpose
processors, the computer system can be categorized as
follows
Single Processor Systems
Multi-Processor Systems
COMPUTER SYSTEM ARCHITECTURE

3. More systems use a single processor.
If there is only one general-purpose CPU then the system is
a single processor system
Single Processor system capable of executing a general
purpose instruction set.
SINGLE PROCESSOR SYSTEMS

4. TYPES OF MULTIPROCESSING
Asymmetric multiprocessing
Symmetric multiprocessing

5. Multiprocessor systems have two or more processors in
close communication.
Multiprocessor systems share the computer bus, clock,
memory and peripheral devices.
Multiprocessor systems also known as parallel systems
or tightly coupled systems.
MULTIPROCESSOR SYSTEMS

6. ASYMMETRIC MULTIPROCESSING
It defines a master slave relationship.
The master processor schedules and
allocates work to the slave processors.

7. SYMMETRIC MULTIPROCESSING
Each processor performs all tasks.

8. ADVANTAGES OF MULTIPROCESSING SYSTEMS
Throughput
Economics of Scale
Increased Reliability

9. THROUGHPUT
Number of instructions executed per
second.

10. Multiprocessor can also save money compared to multiple single
systems, because the processor can share peripherals storage and
power supplies.
ECONOMICS OF SCALE

11. If functions can be distributed properly
among several processors, then the failure
of one processor will not half the system,
only slow it down.
INCREASED RELIABILITY

12. It consists of two or more individual systems field together.
It uses multiple CPUs to compute a task.
The clustered computers share storage and are closely linked
via LAN networking
CLUSTERED SYSTEMS

13. Clustering is usually used to provide high availability service.
It is a group of computer system connected with a high speed
communication link.
CLUSTERED SYSTEMS USES

14. Clustering can be structured
Asymmetrically or
Symmetrically.
CLUSTERED SYSTEMS CLASSIFY

15. In asymmetric clustering, one
machine is in hot-standby mode
while the other is running
applications.
ASYMMETRICALLY CLUSTERING

16. The hot standby host machine does nothing but monitor the
active server. If that server fails, the hot-standby host becomes
the active server.
HOT-STANDBY MODE

17. In symmetric mode, two or more hosts are running
applications and are monitoring each other.
SYMMETRIC MODE

18. Thank you..