Question

Question 4. In your own words, discuss the similarities and differences between multiprogramming and virtualization as known in today's modern computing systems. Question 5. How might a timesharing processor scheduler's policy differ from a policy used in batch system?

Answer 1

Question 4:

Answer: Multi Programming Vs Virtualization

Definitions:

Multi Programming: Multi Programming is the process of executing multiple programs at a time on a uni processor system using the operating system support.

Virtualization: Virtualization is Virtual thing not real thing and virtualization allows to create some hardware functionality simulation using some software . It is related to multiple resources to create like Memory, Network, Server, Data etc

Similarities:

1. Both Concepts allows Concurrent execution of Programs at a time.
2. Both Concepts used to improve Resource utilization of Computers
3. Both Concepts improve performance, efficiency and speed of Computer
4. Both concepts related to software as well as hardware resources management.
5. Both are used to enhance the existing capabilities of a computer.
6. Multi programming can be supported by virtualization and this is advanced one and economically scaled method
7. Multi Programming usage was increased by Virtualization

Differences:

1.Multi Programming is only limited to execute multiple programs on a single processor system and Virtualization can be used for different types of limited resources for better and enhanced usage.

2. Multi Programming support concurrency of programs where as Virtualization supports creation of new functionality of a hardware resource using simulation of multiple images of that hardware component

3. OS Virtualization means allow software to run multiple images of OS using a piece of Hardware .

4. Virtualization supports using intermediate software agents like Guest OS, Hypervisor( Software layer for VM), Server Utilization,emulation etc

5 Virtualization create VMs(Virtual Machines) used to perform intended tasks

6.Virtualization can apply to various domains like

   a) Network Virtualization: To virtualize Band width into Channels

b) Storage Vitualization: To virtualize a single common storage by aggregate(pooling) all network storage components

   c) Server Utilization: Masking of Server Resources

   d) Data Virtualization

    e) Desktop Virtualization

    f)Application Virtualization

So Finally Conclude that Virtualization enhances the Multi Programming Concepts to multiple domains.