November 2001
Intermediate to advanced
158 pages
5h 10m
English
Content preview from IBM ESS and IBM DB2 UDB Working Together
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30 IBM ESS and IBM DB2 UDB Working Together
3.1 Introduction
Enterprise storage systems are designed to make the job of managing storage easier, and at
the same time meet the customers requirements for performance, availability, and cost.
Determining the best configuration often requires balancing these sometimes-conflicting
requirements.
Some configuration sizing decisions are made when a system is purchased. In the case of
ESS, the most important of these decisions include:
The total number of ESS disk systems used to support the application.
The size of cache
The amount of storage capacity
The number of disks
The number and types of host attachments (SCSI or Fibre Channel)
These decisions are discussed more fully in Chapter 4, “
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