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Virtualization is only half the battle for efficiency in Data Centers
Eduard BodorSystem Engineer
Romania & Bulgaria
about virtualisation?
of virtualisation
Right-sizingRight-sizing Hot spotsHot spots ManagementManagement
Claiming your energy savingsenergy savings entitlement
Claiming your reliability and predictabilityreliability and predictability entitlement
Hidden surprisesHidden surprises
Agenda
Agenda
about virtualisation?
To create delighted customers by improving the
manageabilitymanageability, availabilityavailability, and performanceperformance
of information systems and key process controls
through the rapid delivery of innovative solutions
to real customer problems
Mission
Virtualisation impacts Virtualisation impacts all of theseall of these
In response, APC by Schneider Electric is working In response, APC by Schneider Electric is working to change the way the world designs, installs, to change the way the world designs, installs, operates, manages, and maintains data centersoperates, manages, and maintains data centers
Data Center challenges require new solutions
Virtualisation & server Virtualisation & server consolidationconsolidation
Rapid changes in IT technology
High density High density blade server blade server power/heatpower/heat Dynamic power Dynamic power
variationvariationData Data
CenterCenter
Energy and service cost control pressure
Regulatory requirements
Increasingavailability expectations
Agenda
of virtualisation
Increased CPU utilization and efficiencyIncreased CPU utilization and efficiency
Typical server utilization rate: ~10-15% (usually higher in storage)
Virtualized utilization rate: Up to 80%
Server consolidationServer consolidation
Decreased need to purchase additional servers
Increased rack spaceIncreased rack space
Reduced “white space” requirements
Improved continuity and disaster recoveryImproved continuity and disaster recovery
Virtualized servers can be mirrored in case of failure
Reduced labor costsReduced labor costs Easier hardware provisioning and maintenance
Virtualisation Benefits
$366,561
$258,900
Beforevirtualisation
After virtualisation
Extreme energy savings are at stake
After physical infrastructure improvements
Savings from virtualisation alone
Savings from virtualisation Savings from virtualisation PLUS power/cooling re-sizingPLUS power/cooling re-sizing
Details about this case study later
Agenda
Challenges to physical infrastructure
Reduced bulk power & cooling requirementsReduced bulk power & cooling requirements Existing room-level UPS/cooling wastes $$$ and energy
Targeted cooling Targeted cooling distributiondistribution First, blades and 1U appliance servers created high-density hot spots – now, virtualization creates migratingmigrating hot spots!
Need for Need for rackrack-level, -level, real-timereal-time visibility visibility New dynamic environments need proactiveproactive and interactive interactive
management to avoid chaos and downtime
Right-sizingChallenge #1
Hot spotsChallenge #2
ManagementChallenge #3
Over half the power and cooling losses in a data center are fixedfixed and do not vary with the IT load
Efficiency degrades as the load declines
OversizingOversizing is a primary contributor to inefficiency
Virtualisation and server power management will make this problem worse, if power and cooling are sized to non-typical peak IT loads
Power and cooling devices that can scale in capacity – or even be managed to a zero power state – will reduce fixed losses
Needed: Power and cooling infrastructure that can scale Needed: Power and cooling infrastructure that can scale with consolidation and growth from virtualisationwith consolidation and growth from virtualisation
Reduced bulk power & coolingRight-sizingChallenge #1
Virtualisation creates hot spotsHot spotsChallenge #2
Hot spot
BEFORE Virtualisation: Room Cooling is working
Constant load Constant load day and night day and night
Hot spotsChallenge #2
7am – 8 am7am – 8 am
9am – noon 9am – noon
Lunchtime Lunchtime
1pm – 4pm 1pm – 4pm 4pm – 6pm 4pm – 6pm 6pm – 7am 6pm – 7am
8am – 9am8am – 9am
AFTER Virtualisation: Pop-up hot spots Hot spotsChallenge #2
7am – 8 am7am – 8 am
9am – noon 9am – noon
LunchtimeLunchtime
1pm – 4pm 1pm – 4pm 4pm – 6pm 4pm – 6pm 6pm – 7am 6pm – 7am
8am – 9am8am – 9am
Hot spots move around Hot spotsChallenge #2
7am – 8 am7am – 8 am
9am – noon 9am – noon
Lunchtime Lunchtime
1pm – 4pm 1pm – 4pm 4pm – 6pm4pm – 6pm
6pm – 7am 6pm – 7am
8am – 9am8am – 9am
Hot spots move aroundHot spotsChallenge #2
Predictive management tools Management
Challenge #3
What is the solution?What is the solution?
Real-time management dataReal-time management data + predictable infrastructurepredictable infrastructure
Management software can perform Management software can perform “what-if” analysis“what-if” analysis
Where’s the best place for a new server?
What if the server load increases?
What is the impact of change on the physical infrastructure?
Managing change and Managing change and verifying with real-time dataverifying with real-time data is a requirement for efficient and reliable infrastructureis a requirement for efficient and reliable infrastructure
Agenda
Close-coupled cooling for hot spots
CRACs placed IN the rows, closer to hot spots
Unneeded perimeter CRACs removed
Perimeter CRAC removed
Perimeter CRAC removed
Dynamic response to hot spots
In-row units communicate with each other and In-row units communicate with each other and work together to remove extra heat from hot aislework together to remove extra heat from hot aisle
Morning Morning spikespike
Hotter hot spots increased cooling
Evening Evening spikespike
No hot spots reduced cooling
NighttimeNighttime
120 kW total IT load
90 kW total server load (75% of entire IT load)
100% loaded power and cooling system (120 kW)
Data center efficiency 34.4%
Annual electrical bill $366,561
Beforevirtualisation
$366,561Beforevirtualisation
Right-size to maximize energy savings
Annualelectricbill
120 kW IT load 90 kW total server load (75%) Data center load 100% Data center efficiency 34.4%
Annual electrical cost $258,900
3:1 server electricity reduction
Only 1.4:1 total electricity reduction!
Data center efficiency drops to 24.4%
60 kW IT load 30 kW total server load Data center load 50% Data center efficiency
24.4%
ServerVirtualisation
$366,561
$258,900
savings
Beforevirtualisation
After virtualisation
Annualelectricbill
Right-size to maximize energy savings
120 kW IT load 90 kW total server load (75%) Data center load 100% Data center efficiency 34.4%
Right-size power & cooling
Close-coupled cooling
Use blanking panels
High-efficient UPS
Annual electrical cost $126,550
3:1 server electricity reduction
2.9:1 total electricity reduction!
Data center efficiency increases to 51.7%
Payback period less than 4 years
$366,561
$258,900
29%savings
60 kW capacity Data center load 100% Data center
efficiency 51.7%
60 kW IT load 30 kW total server load Data center load 50% Data center efficiency 24.4%
51%savings
BeforeVirtualisation
After Virtualisation
After physical infrastructure improvements
savings
Right-size to maximize energy savings
Electricity Savings per Year: $240,011$240,011 (65%)Electricity Savings per Year: $240,011$240,011 (65%)
Load Load
Scalable infrastructure goes both ways
Capacity Power/cooling
LoadVirtualised Load
LoadOriginal
LoadVirtualised
Load Load LoadVirtualised
LoadVirtualised
Downsize ... Downsize ...
but expect re-growth but expect re-growth
Scale Scale
Scale Scale
Effective MANAGEMENTMANAGEMENT
Capacity ManagementCapacity Management to ensure efficient balance of supply and demand for power and cooling
Capacity ForecastingCapacity Forecasting for adding capacity based on actual data
RecommendationsRecommendations on how to make both large-scale changes and simple device additions to the data center
Change ManagementChange Management as a design process with appropriate optimization and validation
Life-Cycle TrackingLife-Cycle Tracking of data center devices (“Asset Management”)
Auditing of adds/moves/changes/deletesAuditing of adds/moves/changes/deletes and basic workflow management system
Power and cooling: Downsize to match load
New, lower virtualized loadNO CHANGE NO CHANGE to power/cooling
kW capacity
kW IT load
of power/cooling
kW capacity
kW IT load
New, lower virtualized loadRE-SIZED RE-SIZED power/cooling
of power/cooling
Power / cooling infrastructure must be re-sized for lower load
... to avoid electrical waste ... to avoid electrical waste
AND avoid hidden surprises AND avoid hidden surprises
AC shutdownAC shutdown from high “head pressure”
AC short-cyclingAC short-cycling from frequent shutdown reduced life
AC voided warrantyAC voided warranty due to below-limits operation
Hot gas bypassHot gas bypass expense to simulate “normal” load
Hidden surprises
Low virtualized loadNO CHANGE NO CHANGE to power/cooling
kW capacity
kW IT load
of power/cooling
Low virtualized loadNO CHANGE NO CHANGE to power/cooling
kW capacity
kW IT load
of power/cooling
kW capacity
kW IT load
of power/cooling
... from oversized ... from oversized coolingcooling capacity capacity
Hidden surprises
... from fixed-rate utility contracts... from fixed-rate utility contracts
Low virtualized loadNO CHANGE NO CHANGE to power/cooling
kW capacity
kW IT load
of power/cooling
Utility-provider contract Utility-provider contract lower usage only yields partial reduction in bill
Real estate utility contractReal estate utility contract landlord takes the gain from lower bill
kW capacity
kW IT load
Low virtualized loadRERE--SIZED SIZED power/cooling
of power/cooling
Re-negotiate utility contracts – don’t give away your Re-negotiate utility contracts – don’t give away your savings to the utility company or the building ownersavings to the utility company or the building owner
Summary
Virtualisation’s payback potential cannot be fully realised without a parallel re-assessment of physical infrastructurere-assessment of physical infrastructure
Right-sizing Right-sizing and close-coupled cooling close-coupled cooling are powerful tools in the virtualisation toolbox
Capacity ManagementCapacity Management is essential for virtualised environments
Virtualisation introduces availability hazardsavailability hazards that must be understood and addressed
Questions?
