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A Closer Look
Data Center Needs
Industry Trend:
Server consolidation is an important
The data center, as a repository of information assets, is an
trend that impacts the data center in
integral component of the enterprise infrastructure. It
several ways. Applications running on
generally consists of mission critical, application-specific
less powerful previous generation
data stored in large databases and on file servers. Current
servers can be combined onto a single
technology trends such as network computing, the Internet
new server with several times more
and massive data growth are dramatically increasing the
processing power. Consolidation of a
demands on this environment.
server environment can occur in one of
several ways: logical, physical or re-
Companies must pay attention to not only their hardware
centralization.
and software choices but also service and support options
to dependably deliver the information critical to today's
Logical consolidation attempts to
business needs. Selecting the appropriate server
normalize or standardize aspects of the
equipment that resides at the center of this information
server environment, such as manage-
fabric is critical.
ment or backup procedures, and in so
doing, achieve a reduction in staff work-
Data centers have three core needs for this server
loads. In a physical consolidation, the
equipment: performance (data processing capacity), high
servers are re-located into a centralized
availability and scalability.
data center to be "racked and stacked”.
The immediate benefits are improved
Performance for the data center is the ability to process
physical security, lowered system
and transfer large amounts of data quickly within the
management complexity across the
various server sub-systems, also expressed as
servers and a more efficient sharing of
transactions completed per unit of time. Each of the
peripherals.
sub-systems in a server must be optimized as well as
balanced, so that the system delivers the maximum
The third type of server consolidation,
performance and no one component becomes a bottleneck.
re-centralization, involves collapsing the
processing loads from several different
Performance also includes the ability of the server system
servers onto a single, larger server (or
to accommodate peak business periods and occasional
servers). This approach is used to
spikes in the workload. The more a server is sized for
reduce the number of dedicated servers
growth, the more likely it will have sufficient headroom and
or to respond to changing business
be able to accommodate usage peaks. (See Scalability
flows. Re-centralization achieves the
below.)
greatest return on investment (ROI)
benefit and is most suitable for 8-way
Availability is a measure of the ability of the server system
server configurations. All three methods
to deliver constant computing services to clients, also
require that companies employ a con-
expressed as a percentage of time that the system is
solidation approach that encompasses
“available”. Data center equipment must be highly available
technology, process and people in order
(approaching 100% uptime). If an application stops,
to achieve the benefits (reduced staff
revenue generation can come to a halt. The design
workloads, improved manageability and
features of reliability, component redundancy, pro-active
floor space utilization) attributed to
manageability, multi-node fail-over clustering capabilities
server consolidation.
and the appropriate levels of service and support combine
to produce highly available systems.
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