Looking for something? Look here!
Want more unvarnished truth?
What you're saying...
What I'm saying now
I think tag clouds are pretty, and not to be taken overly seriously
##MoveWithGary #Home Inspection #MoveWithGary 111 Chop House 75 on Liberty Wharf 9/11 A Broth of a Boy ABCs Abiouness accountability activities alcohol Allora Ristorante Analysis Angry Hams ANSI/TIA 942 Anthony's Pier 4 Apple Application Armsby Abbey Arsenal Arturo's Ristorante Ashland AT&T Audio Automation baby Baby Monitor babysitting Back To School Bad News Bangkok Thai banks lending movewithgary Bar Bay State Common baystateparent BBQ BCP Bees BeeZers Before I die I want to... behavior Big Bang Bike Bill of Rights Bistro Black Box BlackBerry Boston Boston Marathon boundaries Boyston BPO brand Breakfast Bridge Bring Your Own Technology Budget Burlington Burn Burrito buyer BYOD Cabling Cambridge Camp Campaign career Casey's Diner Castle casual cCabling Cell Phone Central Square Change Management Cheers Chef Sun ChengDu Chet's Diner Children Chinese Christmas Christmas Families Holiday CIO Cloud coddle collage College College Acceptance co-lo Co-Location Co-Location Tier Power Cooling Comfort Food Control Country Country Kettle Crisis customer dad Dad Phrases damage daredevil Data Center Data Center Design Davios Day Care Dead Death declaration Del Frisco's Design Desktop Video dinner Disaster Recovery Divorce Do Epic Shit dodgeball downsizing Downtown Crossing DR driving Droid Easter Economic Kids Edaville Education Elbow Night Elevator Employee Engagement Erin Estate Planning Etiquette Evaluation events Exchange Expiration Dates Facebook Failing family Family Law Fatherhood Favorite things first time buyer Flash Flemings Fogo de Chão Food Hits and Misses Format Foundry on Elm Foxborough Frameworks fraternity Fraud French Fried Clams friends fun Fusion Generations germs Girl Scouts girls Global Go/No Go GPS Grafton Grandchild Grandpa Harry's hazing Healthcare Healthy Choices while Dining Out Help Desk Hisa Japanese Cuisine Historic holiday Home Home Inspection hope Horizons hose Hot Dog Hurricane IIT Assessment incident Indecision Indian Infrastructure Inn Innovation Insurance Internet Inventory Management iPhone IT IT Assessment IT Satisfaction Italian Jack Daniels Jakes Restaurant Janet Japanese Jazz Joey's Bar and Grill JP's Khatta Mitha kickball kids Laid off Lakes Region Lala Java Leadership Learning legacy Legal Legal Harborside Les Zygomates L'Espalier Liberty Wharf life transition lights out Linguine's loss Love Lucky's Cafe luxury luxury home M&M Macys Thanksgiving Day Parade mai tai Managed Application Services Managed Services managers Mandarin Manners Mark Fidrych marlborough marriage Mary Chung mass save Maxwell-Silverman Mediterranean meetings Memorial Day memory Mendon Mergers Mexican MiFi Migration Ming III miss MIT MIT CIO Symposium mmortgage Mobility Moes Hot Dog Truck MOM money mortgage Mother MoveWithGary Moving on Name nature neanderthal neighborhood Network new listing New York Marathon newborn newtomarket Northborough Not Your Average Joe's Nuovo Nursing On-Call Operations Operators Oregon Club Organization Pancakes Pandemic Parental Control Parenting Patch Peeves People Perserverance UMASS growth Photography Play Plug and Run Predictable Pride Problem Process Production program Project Management propane PTA. PTO PUE QR Quick Response Rant re/max Real Estate Realtor Recognition Red Rock Resiliency Respect restaurant Restaurant Guy RFP ribs Ritual Root Cause Analysis rReal Estate Sam Adams Sandy Sapporo savings School Sea Dog Brewing Company Sea Dog Steak and Ale Seafood Seaport Security Sel de la Terra Service Service Desk Service Indicator Light sharing ShearTransformation SHIRO Shit Pump Shriners SHTF Simplification Skunk Works Skype Sleep sleepovers Sloan Smith & Wollensky soccer Son SOP sorority spanking Squarespace staffing staging Starbucks Status Reporting Steak Steve Jobs Storage Strategy stress Summer Sushi swimming Tacos Acalpulco teacher Technology Teen Telephony Temperature Strip Tenka terrorist Testing Texas BBQ Company Text Thai Thanksgiving in IT The Mooring Thomas Thought Leader Three Gorges III TIA 942 Timesheets Toby Keith Toddlers traditions Transition treehouse turnover TV Twitter unspoken moments Valentine's Day Value Vendor Venezuelan Verizon Vermont Video Vietnamese voice VoIP Watertown Wedding Westborough Korean Restaurant Westborough MA. StormCam WiFI Wi-Fi Wilbraham Wine Worcester work work life balance working Yama Zakura Zem Han Zitis

Entries in Temperature Strip (1)


Data Centers are Refrigerators

At their simplest level, data centers are refrigerators.  There are walls, a ceiling and floor, multiple racks, a couple doors and anything hot inside gets cooled.

How you lay out the contents of a refrigerator is determined by the manufacturer.  Similarly, how you lay out the contents of a data center is often determined by the architect and/or Mechanical, Electrical and Plumbing (MEP) firm.

Changes to your refrigerator layout are generally rarely performed, and when they do happen you take anecdotal measures for success (i.e.:  did the milk spoil quickly, did the soda freeze.)

We advise clients to be a bit more analytical when making changes in the air cooled data centers.  Some organizations have IP-based temperature probes throughout the data center, providing a precise view of the data center.   Often, we see less sophisticated organizations making layout changes to extend the data center life without much more than a “hope” the changes are positive.

What’s a simple way to measure the impact of changes?

We advocate use of a simple temperature strip attached to the input (cold aisle) side of racks:





This will immediately give a visual indication of inlet temperature, in a simple unobtrusive manner.

Ready to make changes?

A simple Post-it can be used for recording temps before, and then after changes.  Record the starting point, and once the room stabilizes (in a matter of an hour), record the ending point. 


We believe in KISS (Keep It Simple, Stupid).  Metrics are a must, and even a simple approach is preferred over no approach.  While we do believe a number of data center managers can use their body as a thermometer, a bit more science is generally preferred.

How hot should the data center be in practice?  64-81 °F or 18-27 °C ambient temperature, according to TIA/ANSI standard 942.  At the limits, there can be issues (freezing in direct expansion air conditioning under 68°F or increased device fan noise approaching 81°F.)  In a hot aisle/cold aisle orientation, the hot aisle can be significantly warmer (it’s called the “hot aisle” for a reason) without issue to the equipment.

So why do some data center managers keep it cool?   Often fear.  If a computer room air conditioning unit fails or is taken offline for maintenance, the air flow (distribution) may be insufficient.  Paying attention to the design intention of the space is imperative when making changes and accommodating maintenance.

With appropriate air distribution, data center managers can raise the ambient temperature of the data center and realize lower cooling costs.