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One-Stop Services Get Data Center Online Fast

2015/4/2 0:00:00


Qingdao Unicom, a subsidiary of China Unicom (Shandong), connects major cities, such as Beijing, Shanghai, and Guangzhou. Located near two submarine cable systems and three submarine optical cables, including the Trans-Pacific Express (TPE) and East Asia Crossings (EAC), it is well-placed to offer data center services to several large Internet companies.

To meet growing demand, Qingdao Unicom built a new data center. The center, China Unicom’s largest, is 2,229.411 square feet (21,313 square meters) and accommodates 25 Internet data centers, including one core, 24 V.I.P. rooms, and 3,500 cabinets.


Because of the size, complexity, and time restrictions, Huawei faced several big challenges with this project.

Aggressive schedule

Huawei followed an aggressive two-year, two-phase schedule to get up and running quickly. Phase 1 went online in August 2012 and Phase 2 went online in August 2013.

Large project scale

To take advantage of Qingdao’s rapidly growing business opportunities, Huawei deployed 3,500 cabinets; 750 in Phase 1 and 2,750 in Phase 2.


The data center uses 2N redundancy for power supply modules and N+1 redundancy for cooling systems. It also meets Tier 3 design standards.

Flexible customization

To accommodate demanding end-customers, the solution allows Qingdao Unicom to customize individual power, cabinet, and Power Distribution Unit (PDU) needs easily.


Huawei designed a solution specifically for Qingdao Unicom.

Construction options

Qingdao Unicom had three construction options:

  • Convert an old factory building
  • Build a new data center
  • Use a mobile, containerized data center

Qingdao chose to convert the old factory to expedite service rollout and reduce initial investment costs.

Building layout

Huawei placed air-cooled chillers on the roof to maximize space usage.

Building reconstruction and hardening

Because the building is located in an active fault zone, it was upgraded to Chinese data center standards for earthquake resistance and floor load capacity.

Power supply and distribution

An optimized Tier 3 2N architecture:

  • Ensured load-sharing between two mains supply modules
  • Used N+1 transformer backup, Uninterruptible Power Supplies (UPSs), and Power Distribution Units (PDUs) to deliver 99.99% reliability
  • Reduced initial investment by 25% compared with a Tier 4 architecture

Cooling system

Huawei chose the most appropriate water-side free cooling system after thoroughly analyzing local climate data, considering the investment budget, and Power Usage Effectiveness (PUE).

Modular design

Based on end-customer requirements for 3 kW to 4 kW cabinets, Huawei used a Computational Fluid Dynamics (CFD) simulation to choose under-floor air ventilation plus cold aisle containment.

Egress network optimization

Huawei analyzed traffic models to plan routing and increase backbone network bandwidth from 40 Gbit/s to 320 Gbit/s.

Server customization

Huawei performed scenario-based performance analysis to meet end-customer business requirements. Customization included:

  • Customized SSD cards
  • Customized intelligent network adapters
  • Accelerated Input/Output (I/O)


Huawei provides one-stop planning, design, integration, and delivery services to bring Qingdao online quickly and provide end-customers with innovative solutions. With the new network advantages at the backbone’s core node network, Qingdao was sold out even before the data center came online.

Huawei’s world-class team provided a range of services:

  • Sales
  • Purchasing
  • Project management
  • Technology
  • Quality
  • Coordination

Plus, more than 20 Huawei engineers supported on-site delivery, ensured quality, and delivered the data center efficiently.

Huawei’s solution allows Qingdao Unicom to:

  • Open 1 to 2 years faster than expected, compared to constructing a new building
  • Greatly improve ROI and recover initial investment costs within four years compared to the industry average of 5 to 6 years
  • Optimize the Tier 3 power supply architecture to deliver 99.99 percent reliability
Leverage free cooling technology to deliver 1.5 PUE and reduce power use by 8 million kWh annually
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