Everyman IT

Info

• Level: Beginner
• Presenter: Eli the Computer Guy
• Date Created: December 17, 2010
• Length of Class: 75 Minutes

Tracks

• Cloud and Virtual Computing

Prerequisites

• None

Purpose of Class

• This class introduces students to the world of Cloud Computing and explains that Cloud Computing is more then Virtualization.

Chapters

1. Introduction (00:00)
2. Web Applications (06:51)
3. Clustering (09:26)
4. Terminal Services (16:26)
5. Application Servers (25:13)
6. Virtualization (30:00)
7. Hosted Instances (44:05)
8. Hosted Solutions (54:41)
9. Public vs. Private Clouds (58:06)
10. Final Thoughts (60:00)

Class Notes

1. Introduction
   1. Cloud Computing is a design philosophy that breaks the Operating System and Applications  from the Hardware
2. Web Applications
   1. Are Created in Web Programming Languages
   2. Generally Use Databases to Store Data
3. Clusters
   1. Are Generally Used for Database Servers (MySQL, Microsoft Active Directory)
   2. Load is balanced between servers in a cluster.  If one server fails the cluster responds by not sending traffic to it.
   3. Servers maintain the same data by using replication
4. Terminal Services
   1. Based off of old Mainframe and Dumb Terminal Architecture
   2. Now You Use Terminal Services Servers and Thin Clients
   3. Thin Clients can be Hardware Devices or Software installed on a computer
   4. All processing happens on Terminal Services Server and the Thin Client simply gets a “Window” into the server.
   5. Example: http://www.ncomputing.com/
5. Application Servers
   1. Uses Terminal Services but instead of providing a full Environment it only delivers a specific Application.
6. Virtualization
   1. Uses Desktop Clients Software or Hypervisors to allow you to install multiple Operating Systems on to one physical server.
   2. Hypervisors
   1. 1. i.      Hypervisor is installed on the physical hardware to support the Operating Systems, and Management Software is used to configure each Virtual Machine, or Instance.
      2. ii.      VMWare uses ESXi as the Hypervisor and vSphere for the Management Software
7. Hosted Instances
   1. Examples: Amazon EC2 , Microsft Azure
   2. You Pay for Use (Storage Amount, CPU Power, RAM, Bandwidth)
   3. Edge Locations are used by some providers to allow for faster access to servers over the Internet.  You may be charged to send data from the main servers to the Edge Servers
8. Hosted Solutions
   1. Are pieces of software that are hosted by vendors using the Cloud (Hosted Exchange, Google Docs, Adobe Acrobat.com, Mozy)
9. Public vs. Private Clouds
   1. The Public Cloud is Cloud Computing used from Online Vendors
   2. Private Clouds are environments on business/organization property that use Cloud Technologies.
10. Final Thoughts….
    1. Security… Most Small Business Security is poor. Security for most small to medium sized business will be better when systems are hosted in the cloud
    2. Local and Internet Bandwidth becomes more important with Cloud Computing.  Even on the LAN you may end using all of your bandwidth.

Resources

• VirtualBox
• VMWare ESXi
• Amazon Web Services
• Microsoft Azure
• MySQL Cluster