Strata IT Training

Chapter 16

Green Networking

Green Servers• Power Management

– Power off monitor settings– Automatic server shutdown

policy

• Rack mounted servers– Each server box blots into a

rack

• Blade Servers– Each server is a separate

card in the housing

• Network Attached Storage (NAS)– Can replace file servers

• Use less power

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Virtualization• One physical computer

runs a number of independent server operating systems called virtual machines– Servers dedicated to a task

• Better utilization of hardware

• More power savings• Central management• Popular Products:

– VMWare ESX Server– Microsoft Hyper-V

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Traditional Server Rooms

• Special server room• Cool air under floor• Hot air vent in ceiling• Disadvantage

– Cold air mingles with hot air lessoning the impact of air conditiioning

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Hot Aisle, Cool Aisle

• Computers draw cool air in front and expel hot air in back (just like us)

• Computer face each other to draw in cool air from center.– That beats breathing

someone’s expelled air

• Configure BIOS to adjust speed of fan based on system temp

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User Computer Power Savings• Use LCD screens• Use SSD drives

– Save power

• Laptops save power– Users can work anywhere

• Fat clients vs Thin clients– Switch to thin-clients when

user does not need independent OS on their system

• Less power and heat

Thin clients accessing central server

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Energy Star Rating

• Devices tested by US Dept of Energy– Energy Star compliance rating– Look for Energy Star logo– Monitors

• Windows settings can control Energy Star device power settings.

• ACPI Power options on Motherboard and CPU

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ACPI Power Modes• G0 – Working• G1 – Sleeping

– S1 – S4

• G2 – Soft Power off– the power supply unit (PSU)

still supplies power, at a minimum, to the power button to allow return to S0.

• G3 –Mechanical Off– Power disconnected from

motherboard

– Only realtime clock runs

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Windows Power Saving

• Open Control Panel

• From Small Icon view, click Power Options

• Click Change when the computer sleeps

• Try other options to change power button or lid

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Green WorkersAre not from Mars

• Work space outside of office – Work from home (coffee shop/etc)– Telecommuting– Bandwidth requirements– VOIP

• Sales

• BYOD– Bring device to work/school or where-ever– Major number of nodes on many networks

• BYOD creates strain on organizational networks

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Cloud Computing• Data and services handled

over Internet– IAAS - Infrastructure as a service

• Network configuration done in cloud

• Data storage

– PAAS - Platform as a service

• Program development

– SAAS - Software as a service• Run packages from the Internet

server

• May reduce or eliminate need for IT data center in Small Office Home Office (SOHO) Networks

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Examples from book• SAAS

– Web based Email• Gmail

– Office Applications• Office 365• Google Docs

• IAAS– Data Storage– Data available from

Internet connection• Apple iCloud• Dropbox

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That’s All for Chapter 16