
Chapter 7. Practical performance management 273
number of I/Os per GB. For this metric, you also need information from other Tivoli
Storage Productivity Center reports that include the volume capacity. Manipulating the
data requires additional work.
Nevertheless, TPCTOOL also has a few limitations:
Single subsystem or fabric
Reports can include data of a single subsystem or a single fabric only, regardless of the
components, ctypes, and metrics that you specify.
Identification
The identification of components, subsystems, and fabrics is not so easy, because
TPCTOOL uses worldwide name (WWN) and Globally Unique Identifiers (GUIDs) instead
of the ...