Asymmetric Clustering-Symmetric clustering-parallel clusters-symmetric multiprocessing-distributed systems-Asymmetric Multiprocessing-Real time system

1. What is meant by Asymmetric Clustering?

In this clustering, one machine is in hot standby mode, while the other is
running the application. The hot standby machine just monitors the active server. If
that server fails, hot standby host becomes the active server.

2. What is meant by Symmetric clustering?

In this, two or more hosts are running applications and they are monitoring
each other. This clustering requires more than one application be available to run
and it uses all of the available hardware.

3. What is meant by parallel clusters?

Parallel clusters allow multiple hosts to access the same data on the shared
storage. Each machine has full access to all data in the database.

4. What is meant by symmetric multiprocessing?
In Symmetric multiprocessing, each processor runs an identical copy of the
operating system and these copies communicate with one another as needed.

5. What is meant by Asymmetric Multiprocessing?

In Asymmetric multiprocessing, each processor assigned a specific task. A
master processor controls the system and the other processors either look to the master
for instruction or have predefined tasks. This master processor also schedules and
allocates work to the slaves.

6. What is meant by the Real-time system?
Real-time systems are systems that have their in-built characteristics as supplying
immediate response. In real time system, each process is assigned a certain level of
priority according to the relative importance of the events to be processed.

7. What are the advantages of distributed systems?
Ø Resource sharing
Ø Load balancing
Ø Reliability
Ø Communication link easily

8. What are the applications of real-time systems?

Ø Controlling the machines
Ø Instruments
Ø Industrial process
Ø Landing & taking off airplanes
Ø Real-time simulations
Ø Military applications.

9. What are the types of Real-time systems?

Ø Hard Real-Time System
Ø Soft Real-Time System

10. What is meant by Hard Real-time systems?

They are generally required to and they guarantee that the critical tasks are
completed in given amount of time.


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