ENVS 1000 Lecture 13: ENVS 1000 Tutorial 13 Notes
10 May 2018
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ENVS 1000 Tutorial 13 Notes – Virtualization
Introduction
• Many organizations consider virtualization an important tool in building large, cost
effective, system solutions.
• We mention virtualization here because, in a sense, it is the opposite side of the coin
• Now that all this computing power is available, how do we put it to use?
• An introduction to the concept of virtualization is presented
• Of course, there are other parts of the system we have yet to consider.
• In particular the operating system software and the interconnection of individual
computing systems into larger systems using network technology.
• But, hey, it’s ot possile to disuss eerythig all at oe!
• Putting all the pieces together
• At this point we have explored the various components that make up a computer
system
• One or more CPUs, primary storage, I/O modules, various I/O devices, and the buses
that connect everything together.
• You have seen how the CPU processes instructions, and the kinds of instructions that
are executed.
• You have seen the different methods that are used to transfer data between an I/O
device and memory for use by the CPU.
• You’e see that the use of DMA ad a opletio iterrupt is a effetie ad effiiet
way to move large blocks of data quickly.
• You’e also seen that programmed I/O is more effective for small amounts of data,
particularly when speeds are extremely slow.
• You’e see ho iterrupts a e used together ith prograed I/O to keep a
pipeline of slow, character-based I/O data moving, for example, from a program to a
modem.
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