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IaaS, Colocation, PaaS, Hybrid Cloud – What Does It Mean?

We hear too many buzzwords surrounding infrastructure related services, and it can be difficult to know exactly what you need. Sierra offers services through our Tier-3 data center located in Pittsburgh, PA, including:

  • Platform as a Service (PaaS): Simply stated, this means that we provide a managed virtual server that the customer is able to utilize. We ensure that the virtual server is functioning and performing properly, and the customer manages all data and applications within the virtual server.
  • Infrastructure as a Service (IaaS): In this case, we provide access to all of the hardware needed, including servers, racks, wiring, network gear, heating and cooling, and more. We manage the hardware, and the performance and operating system are managed by the customer.
  • Colocation would include access to our data center environment only. This means that the customer provides their own server and networking gear, while we provide a rack, power, and HVAC.
  • Hybrid options would include a combination, or somewhere in between these options. For example, if a customer provides a server only, we can provide the remaining infrastructure needed to operate.

Data Center Features

Whether you are utilizing PaaS, IaaS, colocation, or a hybrid option, Sierra’s Tier-3 data center located in Pittsburgh, PA offers leading capabilities.


Sierra Data Centers has multiple security measures in place to ensure the safety of your data. These include two factor authentication, locked racks, and secured caged spaces.


Sierra Data Centers is connected to 3 power substations, 8 major telecom carriers and 3000 lines of fiber. Through our national telecom partners we provide a full range of connectivity solutions including local Metro Ethernet, to national managed SIP and MPLS networks, with support for T1/T3/Dark Fiber private lines, VoIP, Video Conferencing, VPN and Point-to-point solutions.

Power Redundancy

A and B side power is delivered directly into each rack 120V or 208V, through UPS systems, multiple power grid connections, and a 1.45MW generator with 16000 gallon capacity diesel fuel tanks.

HVAC Redundancy

Redundant generator connected Liebert HVAC Systems ensure that the data center space will maintain the necessary temperature and humidity for proper system operation, even during extended power outages or single HVAC unit failures.

Monitoring Systems

Multiple automated monitoring systems have been deployed, ensuring that immediate notification is delivered to data center personnel as soon as any thresholds are breached.

Fire Prevention

Dry pipe sprinkler systems have been installed, supported by very early smoke detection monitoring systems, preventing any unexpected leakage while providing the fastest possible activation.

Space Availability

With 4,000 square feet of raised floor space currently available and an additional 9,000 square feet available for expansion, the Pittsburgh Sierra Data Center has space for the largest and most demanding customer’s needs.

Expert Support

With any of the choices, IaaS, PaaS, colocation, and hybrid, expert 24/7/365 support is available. Sierra’s engineers have extensive experience with virtually any type of network, and we never outsource our support.

Iaas, Paas, Colocation
Iaas Paas Colocation Features


  • 24/7/365 support available
  • Power and HVAC redundancy
  • Secure facilities

More Information

Please see our FAQ page for additional information about our hosting solutions.
Visit www.SierraDataCenters.com for more information about our data center facilities.

If your question isn’t listed there, feel free to email or call us at 412-722-0707