The tiering allows multiple applications to share and also span a smaller number of highly available infrastructures. The provides numerous benefits, such as:
- Multiple classes of application can leverage previously unattainable high availability services at a lower (shared) cost;
- More efficient use of server capacity;
- Database licensing efficiencies;
- Reduced points of administration and management;
- Fewer but better skilled database administration staff; and
- Reduced physical infrastructure based on relatively inexpensive high performance server hardware with nominal rack space and power utilisation.
The requirement for dedicated hardware for an application based on vendor contractual limitations, should be avoided. Dedicated database hardware should only be used where the database platform is not strategic, and/or there are potential reliability or performance issues identified due to poor application design.
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