Chapter Ten Safe, Legal, and Green Computer Usage Part II: Energy Efficiency

© Wiley, Inc. All Rights Reserved. Strata Objectives Covered 5.1 U.S. (no U.K. equivalent) Identify environmentally sound techniques to preserve power and dispose of materials –Power management (power saving features) –Power management PCs and lower power servers –Replace large desktops with energy efficient laptops and thin clients 5.2 U.S. (no U.K. equivalent) Identify green techniques, equipment, and procedures –Define Cloud Computing –Define VoIP and how it relates to Green IT –Duplex printing and user lower cost per page network printers –Terminal servers (continued) 2

© Wiley, Inc. All Rights Reserved. Strata Objectives Covered 5.2 U.S. (no U.K. equivalent) Identify green techniques, equipment, and procedures –Use low power NAS instead of file servers –Green building infrastructure –Employee telecommuting 3

© Wiley, Inc. All Rights Reserved. Power Management Puts computer in low-power mode after a specified period of inactivity Low Power Modes –Sleep/Standby Keeps RAM powered Wakes up quickly –Hibernate Copies RAM content to hard disk Shuts down completely Wakes up less quickly 4

© Wiley, Inc. All Rights Reserved. Power Management Plans Some companies have energy- saving policies –Employees must place computers in low-power modes or power down –Monitors must be set to turn off after a specified idle period Policies are implemented in the OS by setting up a power plan 5

© Wiley, Inc. All Rights Reserved. Power Plans Can include settings for –Display –Hard disks –USB devices –Wireless adapters –PCI Express bus devices –Sleep or hibernate modes –Warnings about battery power remaining 6

© Wiley, Inc. All Rights Reserved. Configuring Power Plans Windows: Control Panel, Power Options 7

© Wiley, Inc. All Rights Reserved. Configuring Power Plans Mac OS X: System Preferences, Energy Saver 8

© Wiley, Inc. All Rights Reserved. Shutdown Scripts Network administrator can manage remote startup and shutdown via scripts Example: –Shutdown –s –m

© Wiley, Inc. All Rights Reserved. Hardware Power Conservation Monitors –Decrease brightness (especially on a notebook PC running off battery) –Stand by or shut down after a specified period of inactivity –Turn off unneeded secondary displays Hard Drives –Use solid state drives –Set hard disks to stop spinning after a specified period of inactivity 10

© Wiley, Inc. All Rights Reserved. Energy Star U.S. Environmental Protection Agency (EPA) rating system Now recognized internationally Energy Star logo means device meets certain energy-efficient standards 11

© Wiley, Inc. All Rights Reserved. Virtualization Virtualization creates a separate environment inside the main OS Separate environment may run different OS, or different services Can be used for testing or for having multiple servers share a single physical computer 12

© Wiley, Inc. All Rights Reserved. Virtualization Applications Oracle VirtualBox (Windows, Mac, & Linux, free) VMware Workstation (Windows, commercial) Vmware Player (Windows, free) QEMU (Windows & Linux, free) VMware Fusion (Mac, commercial) Parallels (Mac, commercial) Virtual PC (Windows) 13

© Wiley, Inc. All Rights Reserved. Efficient Printing Duplexing Low-power sleep modes for printers Printer settings that reduce the amount of toner or ink used 14

© Wiley, Inc. All Rights Reserved. Energy-Efficient Server Usage Energy efficient server hardware Combining server functions Terminal servers Remote desktops Network attached storage 15

© Wiley, Inc. All Rights Reserved. Energy Conservation in Business IT Green building infrastructure –Eliminate cool air leaks in server room –Proper spacing for cooling IT equipment –Energy efficient cooling fans in PCs Cloud Computing –Applications and data stored and delivered online 16

© Wiley, Inc. All Rights Reserved. Voice over IP (VoIP) Uses the Internet to deliver telephone services Savings by not having separate phone wires in a building and not maintaining a separate phone system network Savings in hardware costs, because a single switch can be used for both Internet and telephone 17

© Wiley, Inc. All Rights Reserved. Telecommuting Employees work from home No commuting energy costs, with reduced fuel emissions Lower office space maintenance costs (light, heat, cooling, rent, furniture) Increased worker satisfaction 18