CPAP.com Introduction to Virtualization and Storage Area Networks

Virtualization
What is it?
What is it good for?
What is it not so good for?

Server

A physical computer, usually with hardware
designed for high performance and availability.
Web Server
Email Server
Database Server

Operating System
Software platform upon which applications “run”
and which enables and controls access to
hardware.
Examples

Windows (XP, Vista, 7, 8)

OS X

Linux

CP/M

Memory
CPU
Networking
Storage
Traditional Server
(Logical Representation)

Service
A program that allows clients (users or other
services) to do work.

Apache – serves web pages to clients

MySQL – stores data and answers queries

Sendmail – receives and delivers email

Virtualization Layer
(hypervisor)

Software that runs between physical server
(host) and virtual machines (guests).

Virtual Machine
(Virtual Server)
A computer (CPU, memory, networking, storage)
created and running entirely in software.

CPAP.com Introduction to Virtualization and Storage Area Networks

SAN
(Storage Area Network)
A pile of big, fast hard drives and a system to
share them across a very fast network.

Why Virtualize?

Efficiency – reduced costs
Hardware (servers, network infrastructure, storage, etc.)
Real estate (rack space)
Power and cooling

Why Virtualize?


Portability

Why Virtualize?


Portability

Availability

Why Virtualize?


Portability

Availability

Manageability
Faster deployment


Server “sprawl”

Performance issues
Storage
CPU

Security

CPAP.com Introduction to Virtualization and Storage Area Networks

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CPAP.com Introduction to Virtualization and Storage Area Networks