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52 IBM ^ xSeries 440 Planning and Installation Guide
These are summarized in Table 2-1 and described in detail below.
Table 2-1 Server consolidation strategies
Centralization
Server consolidation means different things to different people. As shown in
Figure 2-4, in its simplest form, servers are physically moved to a common
location. Because this simplifies access for the IT staff, it helps reduce
operations support costs, improve security, and ensure uniform systems
management. This is an important predecessor to future consolidation
activities.
Figure 2-4 Centralization
Centralization involves relocating existing servers to fewer sites, for example,
taking 20 servers scattered over three floors in your building and moving them
Type of Consolidation Definition Potential Benefit
Centralization Relocate to fewer sites Reduction in administration costs
Increased reliability and availability
Lower operation costs
Improved security and management
Physical Consolidation Replace with larger
servers
Reduced hardware and software costs
Improved processor utilization
Reduced facilities costs (space, power, A/C)
Lower operations costs
Improved manageability
Data Integration Combine data from
multiple sources into a
single repository
Reduced storage management costs
Improved resource utilization
Reduction in administration costs
Improved backup/recovery capabilities
Enhanced data access and integrity
Application Integration Consolidation of
multiple applications
onto one server
platform
Reduction in administration costs
Increased reliability and availability
Reduced facilities costs (space, power, A/C)
Lower operation costs
Scalability
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