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Energy is another important issue for every data center to review.

How exhaust air is returned to the cooling units within the data center is as important a consideration as the distribution of cool air to the servers. Hot aisle and cold aisle techniques must be extended to include evaluation of airflow dynamics. At higher power densities the amount of space required to house cooling equipment will overtake the number of cabinets. Alternate approaches, or a reduction in the amount of equipment housed in each cabinet, must be considered.

Use server-based energy management software tools to run workloads in the most energy-efficient way. This may include taking advantage of lower energy tariffs at different times.

In-house data centers can be a business weak link if proper attention isn’t paid to power use, cooling capacity, disaster recovery preparedness, running IT to support compliance initiatives, and staffing flexibility to support utility computing initiatives.

Server virtualization is the masking of server resources (including the number and identity of individual physical servers, processors, and operating systems) from server users. The intention is to spare the user from having to understand and manage complicated details of server resources while increasing resource sharing and utilization and maintaining the capacity to expand later.

Hypervisor software is the secret sauce that makes virtualization possible. This software, also known as a virtualization manager, sits between the hardware and the operating system, and decouples the operating system and applications from the hardware. The hypervisor assigns the amount of access that the operating systems and applications have with the processor and other hardware resources, such as memory and disk input/output.

Data backup involves the saving of your data in two or more locations, so that if something happens to your computer, you still have your data reserved in backup. This allows you to keep your data even if you lose your computer.

With the Cisco UCS 82598KR-CI adapters, a maximum of two adapters are presented to the VMware ESX hypervisor running on the blade. This interface count does not support a fabric failover, and the service console must be migrated to the Cisco Nexus 1000V Series Switch along with all these other adapter types if any high-availability requirement exists. The actual migration of this interface during VMware ESX deployment on the blade is discussed in the specific adapter section later in this document, but for more detailed information about how to migrate a user's service console, see the Cisco Nexus 1000V Series documentation.

Just as the efficiency of an automobile depends on how it is driven, the efficiency of IT depends on how it is used. This is just as true for the private consumer as it is for the large corporation or public authority with large data centres and server rooms.

High availability data systems optimize the reliability of data storage systems by providing redundancy only of critical components to eliminate single points of failure. A single point of failure occurs when the failure of a single component of a system causes the entire system to cease operating, resulting in the potential loss of data. Therefore, one goal in designing a high availability data storage system is to provide a satisfactory level of reliability while keeping the cost of the system in check.

Next-generation data centers have specific server networking needs, and the Cisco Nexus 5010 one-rack unit (RU) switch provides an Ethernet-based unified fabric that's designed to meet those needs.