Data Center Energy Solutions

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Intelligent Green Data Center

Strategies – PA Forum

Enabled by Data DeDuplication

Stefano Pirovano

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Agenda

y IT’s Growing Carbon Footprint

y Green Only for Green’s Sake?

y Balancing Business and Green

y Storage Choices

y Green for Backup = Green for Archiving

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1_{"Solutions for the Datacenter's Thermal Challenges." IDC White Paper. Document #205113, January 2007, p. 1} 2_{www.eia.doe.gov/cneaf/electricity/epa/epat7p4.html}

3_{Amount of server, storage, and connectivity in a given footprint}

Green Data Center Efforts Face Three Constraints

yPower and Cooling

– For every $1 in new h/w, $0.50 in power/cooling1

– Cost/kW: Commercial rate up 30% 2000-20072

– Increasing “technology density”3 _{means greater cooling demands}

– 37% of power budget burned by storage (Storage Magazine, 3/07)

ySpace

– Data growing by 60% per year

– Finite total footprint per data center Reducing Power, Cooling,

and Space Critical to Go Green

yBut methods must make business sense

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1_{”Is storage top energy hog in data centers?” Dec 6, 2007, SearchStorage.com}

“If you want to save power, shut everything off and put it on tape. But if you have data that’s time-sensitive and

performance-sensitive, that’s a different story.”

Greg Schulz, Founder, StorageIO Group1

Green Only For Green’s Sake?

A Path to Failure

yClosing data centers is green, but not sustainable

yScrapping and rebuilding existing data centers prohibitively expensive

Intelligent Green Balances Business and Green Objectives

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Balancing Business and Green

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Storage Choices

Three Main Storage Technologies

yTape

yDisk-to-disk

yDeduplication

Let’s Look in Detail at Backup

yResults mirror those for archiving, DR, and virtualization

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Exhaust

Alternative 1: Backup to Tape

Problems

ySlow (backup, transport, retrieve, restore)

yTape libraries have large space footprint

yOffsite transport by truck, storage facility power and cooling

ySecurity: Risk of loss or theft

yLabor intensive

yFailed restores

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Alternative 2: Backup to Disk

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Alternative 3: Backup to Dedupe Disk

Dedupe

Post Process:

Dedupe After Storing

Store

3x disk accesses to shared store

Dedupe

Inline: Dedupe Before Storing

Process contention is worse if there are more of them

X Copy to tape: Too slow to stream tape X Recovery: SLA predictability X Replication: Poor time-to-DR

X Dedupe itself if interleaved with backup or

restore

More admin to fight these issues

Other activities unimpeded

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Inline Deduplication Balances Business & Green

Objectives

Business Requirements yPros – Security – Performance – Cost yCons – Green Initiatives yPros – Power* – Cooling – Space yCons –

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Green for Backup = Green for Archiving

Archived data held for longer duration

yLeads to additional challenges

Tape: Same drawbacks as backup and more

yFinding/restoring a specific archived file requires restoring the whole archive

yMedia format obsolescence

Disk array: Expensive and power/cooling/space hogs Deduplication: Intelligent green for archiving

yHigher performance, smaller footprint than tape

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1_{”The Greening of the Data Center,” The Taneja Group, August 2007, page 8}

Data Domain & Avamar Enables Intelligent

Green IT Strategies

Intelligent: Business Requirements

yCost

– Lower TCO, higher ROI

yPerformance

– Less Management: Simple, Mature, and Flexible

– Scalable: Supports multiple tiers of storage, all data types

– Throughput: Dedupes faster than others write raw data

ySecurity

– Data Integrity: Highest, storage of last resort

– Replication: Pass DR audits

Green: Space, Power, Cooling

– Less Disk

– Inline dedupes before hitting disk

– Uses CPU instead of spindles for performance

yLess Tape

– Reduce/eliminate tape, drives, transport, vaulting

Data deduplication “is a green technology because

highly optimized storage systems house less data and

grow more slowly, thus pulling less power and generating less heat…The

result is massive capacity savings and attendant

energy savings.”

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Intelligent Green Data Centers

Power, cooling, and space budgets stretched

Intelligent green strategies meet green and business requirements simultaneously

yTape or disk-to-disk fail one or the other

yDeduplication does a better job, but not all deduplication is equal

Inline deduplication from Data Domain & Avamar meets aggressive SLAs while restraining growth in power,