Northwestern University Information Technology
Data Center Elements
Research and Administrative Computing Committee
Presented October 8, 2007
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Evanston Data Center Physical Space
Note: All areas shown have
computer room raised floors
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173: Research (950 ft )
Mailroom (2600 ft )
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172: Hosting (3850 ft )
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171: Operations/Printing (1950 ft )
Staff offices
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Chicago Data Center Physical Space
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234: Departmental Hosting 232: Hosting (1000 ft )
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(800 ft )
Note: Areas do not have computer room raised floors.
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Data Center Tier Classification
The Tier classifications were created to consistently
describe the site-level infrastructure required to sustain data
center operations, not the characteristics of individual systems
or sub-systems.
The requirements were established by the Uptime
Institute, Inc. and are necessarily and intentionally very broad
to allow innovation in achieving the desired level of site
infrastructure performance, or uptime.
The individual Tiers represent categories of site
infrastructure topology that address increasingly sophisticated
operating concepts, leading to increased site infrastructure
availability.
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Data Centers Tiers
Tier I: Basic Site Infrastructure
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Non-Redundant Capacity Components and Distribution paths.
Any Capacity Component or Distribution Path failure will impact the computer systems.
Planned work will require most or all of the systems to be shutdown.
Tier II: Redundant Capacity Components Site Infrastructure
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Redundant Capacity Components, but single Non-Redundant Distribution Paths serving the site’s
computer equipment.
Redundant UPS modules and engine generators are required.
A distribution path failure will cause the computer equipment to shut down.
Tier III: Concurrently Maintainable Site Infrastructure
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Redundant capacity components and multiple distribution paths serving the site’s computer
equipment. Generally, only one distribution path serves the computer equipment at any time.
Each and every capacity component and element of the distribution paths can be removed from
service on a planned basis without causing any of the computer equipment to be shut down.
Tier IV: Fault Tolerant Site Infrastructure
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Redundant capacity systems and multiple distribution paths simultaneously serving the site’s
computer equipment
The site is not susceptible to disruption of service from a single unplanned worse-case event.
Infrastructure maintenance may be performed by using redundant capacity components and
distribution paths to safely work on the remaining equipment.
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Tier Rating of NUIT Data Centers
Northwestern University’s central IT data centers are Tier I facilities.
Tier I: Basic Site Infrastructure
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Non-Redundant Capacity Components and Distribution paths.
Any Capacity Component or Distribution Path failure will impact the computer systems.
Planned work will require most or all of the systems to be shutdown.
Building Cost Comparison of Tier Facilities
Construction Cost (+/- 30%)
Raised Floor (per sq. ft.)
Useable UPS Output (per kVA)
Tier I
Tier II
Tier III
Tier IV
$220
$220
$220
$220
$10,000
$11,000
$20,000 $22,000
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Electrical Infrastructures
Evanston Data Center
Room 172: Hosting
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Dual Power Feeds
Two 150kVA UPS units running in parallel
750kVA Diesel Generator
Single Distribution Path
Room 173: Small Research Center
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Single Power Feed
Single 160kVA UPS unit
No Generator
Single Distribution Path
Chicago Data Center
Rooms 232 and 234
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Single Power Grid
350kVA UPS unit
375kVA Diesel Generator
Single Distribution Path
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Electrical Capacity for Evanston Data Center
Hosting Rooms 171 and 172
• What is the protected load capacity?
Safe Electrical Draw is 240kVA
• What is today’s consumed load?
Today’s Draw is 210kVA
A power reduction plan is underway to shed load
and bring the total draw down to 195kVA for these two
rooms. Thus providing 45kVA of unused safe draw to utilize.
Small Research Center Room 173
• What is the protected load capacity?
Safe Electrical Draw is 128kVA
• What is today’s consumed load?
Today’s Draw is 20kVA
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Electrical Capacity for Chicago Data Center
Hosting Rooms 232 and 234
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What is the protected load capacity?
Safe Electrical Draw is 300kVA
What is today’s consumed load?
Today’s Draw is 300kVA
A power co-generation project to bring additional power into this location has been
cancelled by Facilities Management. Facilities Management is recommending the purchase
of a larger diesel generator.
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Cooling Capacity
Mailroom
Room 171
Room 172
Room 173
Mail Room
40 Tons supports up to 120kVA*
80 Tons supports up to 240kVA*
20 Tons supports up to 60kVA*
60 Tons supports up to 180kVA*
172: Hosting
20 tons
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173: Research
Evanston Data Center
40 tons of cooling
80 tons of cooling
171: Operations/Printing
40 tons of cooling
*Aging units cause lower operating efficiencies causing
a 25% inefficiency in cooling capacity.
Staff offices
A HVAC upgrade project is underway to replace aging units will be completed in June 2008.
• Room 172
180 Tons supports up to 510kVA
• Room 173
60 Tons supports up to 190kVA
Chicago Data Center
• Rooms 232/234 60 Tons supports up to 90kVA
234: Departmental Hosting
232: Hosting
60 tons of cooling
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Fire Suppression
Evanston Data Center
• Pre-action sprinkler system
• Fire Protection project is underway and upgrades
will include FM200 protection in Rooms 171, 172
and 173
Chicago Data Center
• Pre-action sprinkler system
• FM200 fire suppression system
234: Departmental Hosting
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232: Hosting
Physical Security
Evanston Data Center
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NetBotz
DDC Sensors
Marlok
AI Phone
Surveillance Monitoring System
Environmental Monitoring System
Access System
Door Call Entry System
Chicago Data Center
• NetBotz
• Marlok
Monitoring System
Access System
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Network Connectivity and Security
Evanston Data Center
• Dual Fiber Connection to Evanston NUNet
• Dual CISCO 6509 Switches
• Redundant Netscreen Firewalls
Chicago Data Center
• Dual Fiber Connections to Chicago NUNet
• Dual CISCO 6509 Switches
• Redundant CISCO PIX Firewall Blades in 6509 switches
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Storage Capacity
Evanston Data Center
Chicago Data Center
• Storage Area Network
• Dual Cisco 9509 Fiber Channel Directors
• 57.2 TB Disk Storage
• 700 TB Tape Storage
• Disk Storage
• IBM DS8100 Enterprise Disk Array
• IBM DS4500 Disk Array
• IBM DS4100 Disk Array
• TAPE
• IBM 3584 ATL
• IBM Ultrium LTO1 and LTO2 tape Drives
• Storage Area Network
• Dual Cisco 9509 Fiber Channel Directors
• 4.2 TB Disk Storage
• 100 TB Tape Storage
• Disk Storage
• IBM DS4500 Disk Array
• TAPE
• IBM 3310 ATL
• IBM Ultrium LTO3 tape Drives
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