power & cooling considerations for virtualized …...© 2007 apc-mge reduced bulk power &...

© 2007 APC-MGE

Power & Cooling Considerations for Virtualized Environments

Cisco Data Center Day 2008

31-01-2008

© 2007 APC-MGE

APC-MGE Vision & Mission� OUR VISION

APC-MGE products ensure availability wherever data is created, transmitted or stored….from desktop to dat a center to factory floor.

� OUR MISSION

To create delighted customers by improving the manageability, availability and performance of info rmation systems and key process controls through the rapid delivery of innovative solutions to real customer problems.

© 2007 APC-MGE

Gartner CIOs: Undeniable Trends

� 70% of respondents recently said power and/or cooling issues are now their single largest problem facing their data centers

� Projections are 48% of data center budget spent on energy, up from 8%

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TopIssuesPowerandCooling

© 2007 APC-MGE

Benefits of Virtualization� Increased CPU Utilization/Efficiency� Typical server utilization rates are approximately 10-15% usually

higher in storage. With Virtualization, utilizatio n rates as high as 80%

� Server Consolidation � Decreased need to purchase additional servers

� Increased Rack space� Reduced data center space requirements

� Improved Continuity & Disaster Recovery� Virtualized servers can be mirrored in case of fail ure

� Reduced Labor Costs � Associated with hardware provisioning and maintenan ce

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Impact on Power & Cooling � Reduced overall bulk power & cooling requirements� Existing room- level UPS/Cooling wastes $$$ energy

� Higher burden on cooling distribution = Hot spots� Blades and 1U appliance servers

� Need for row/rack/”U” level, real-time visibility to dynamic environment� Power and cooling capacity thresholds� Physical and environmental threats

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Reduced bulk power & coolingPotential Energy Impact

� 60 kW IT load

� 50% loaded physical infrastructure (120 kW)

� Data center efficiency 28.1%

� Annual electrical bill $217,926

$217,926Before

Virtualization

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Low Density Raised Floor Room Cooling with Hot Aisle / Cold Aisle Arrangement

Room design has worked well in low density rooms

Only 2 kW per rack

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� 60 kW IT load

� Data center load 50%


Electricity Savings per Year: $58,636 (27%)Electricity Savings per Year: $58,636$58,636 (27%)

� 3:1 reduction in servers

� ~3:1 reduction in rack utilization

� Annual electrical cost $159,290

� Only 1.4:1 electricity consolidation!

� Data center efficiency drops to 13.1%

$217,926

After Virtualization

$159,290

27%$ savings

BeforeVirtualization

� 20 kW IT load



3:1 reduction ratio


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Room Cooling Architecture For Data Center …..

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� 60 kW IT load



Electricity Savings per Year: $123,273 (77%)Electricity Savings per Year: $123,273$123,273 (77%)

� Rightsize power & cooling

� Close coupled cooling

� Use blanking panels

� High-efficient UPS

� Annual electrical cost $36,017

� 4.4:1 electricity reduction!

� Data center efficiency increases to 57.7%

� Payback period < 2 years

$217,926

After Virtualization

$159,290

27%$ savings

BeforeVirtualization

� 30 kW capacity



� 20 kW IT load



After physical infrastructure improvements

$36,017

78%savings

© 2007 APC-MGE

� Over half the power and cooling losses in a data center are fixed and do not vary with the IT load (the efficiency degrades as the load declines)

� Oversizing is therefore a primary contributor to inefficiency

� Virtualization and server power management will make this problem worse, as power and cooling are sized to peak IT loads that are not typical

� New power and cooling devices that can scale in capacity and/or be managed to a zero power state, reducing the fixed losses

Reduced bulk power & coolingImpact of Rightsizing

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Low Density Row Cooling for Heat Removal

30kW per Rack

No heat escapes from hot aisle

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Reduced bulk power & coolingImpact of Rightsizing

Capital expense, electricity, and maintenance costs are eliminated for infrastructure that is never deployed

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In-Row Cooling� Cooling systems are placed within

IT rows instead of at the room level

� Inherently higher power densitycapability than room designs

� Fan power is reduced by 35%� Needless dehumidification /

rehumidification is eliminated (saving millions of gallons of water per year per MW)

� Need for high-bay areas and raised floors are reduced or eliminated (particularly for small installations)

� Cooling capacity can “follow” IT loads that move due to Virtualization / server power management

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High Density Cooling With Rack Air Containment

Designed to cool individual high density rack, with or without redundancy

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High Burden on Cooling DistributionClose-coupled Cooling

InRow air conditioner Can operate on hard

floor or raised floor

Hot-aisle air enters from rear preventing

mixing

Cold air is supplied to the cold aisle

Heat captured and rejected to chilled

water

Data Center Polling Results: Power and Cooling, Gartner Research, Feb 2, 2007

63% of users surveyed expect to be using “in rack” or “in row” cooling in the next two years

© 2007 APC-MGE

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% IT Load

% L

oss

Typical case room cooling

0.92 SHR

Improved architecture row cooling

1.0 SHR

Air handler & humidifier loss

exceeds IT load in this region

High Burden on Cooling DistributionAir Handler + Humidifier Loss Comparison

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Need for Real-time Visibility� Stranded or unusable power and cooling

capacity is often created within data centers by unmanaged change

� Virtualization and server power management will make this problem worse, as power and cooling are sized to peak IT loads that are not typical

� Capacity management for physical infrastructure is critical to dynamic and virtualized environments

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Need for Real-time VisibilityTypes of Threats

� Power & Cooling Issues

� Humidity Levels

� Liquid Leaks

� Smoke

� Fire

� Unauthorized Human Interference

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The 1.2m cold aisle cannot deliver enough cold air to cool the racks

Increased Density Raised Floor Room Cooling with Hot Aisle / Cold Aisle Arrangement

5kW per rack

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Demand Monitor &Reactive Control

Supply Monitor &Reactive Control

Supply Device Limits

Demand Device Limits

UPS, PDU, A/C, Chiller, Utility Equipment Server, Storage, Network Cabinets

Power, Temp, Airflow data

Demand Abatement Request

Data Center Spatial and Temporal Model

Logical Connection

Data

System Performance

Limits

Supply Device Charac-teristics

Device Location

Data

Scenario Analyzer

Alarms

Demand Data

Supply Data

Alarms

AlarmsAlarms

Reports on Efficiency,

Stranded Capacity, Spare Capacity,

Redundancy, Margins

IT IT Realm Realm

(Demand Side)(Demand Side)

Capacity Management

System

Integrated Integrated ModelModel

Power & Power & Cooling Cooling Realm Realm (Supply Side)(Supply Side)

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APC-MGE Data Center Assesments� We can help you determine what's happening in

your data center today

� We can simulate virtual environments for data centers

� We can help guide you on your Data Center Designs

� We can help you achieve Energy Efficiency

� We can help you achieve “Green” Standards

© 2007 APC-MGE

Tools to Help you further – APC White Papers!

APC has many White Papers about Data Center Efficiency…… ..www.apc.com

© 2007 APC-MGE

Summary� Virtualization offers benefits that can’t be fully

realized without considering physical infrastructur e

� Rightsizing can be accomplished even with dynamic environments – planning is critical

� Close-coupled cooling saves a large amount of power

� Capacity management is essential for virtualized environments

power & cooling considerations for virtualized …...© 2007 apc-mge reduced bulk power &...

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