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286 DS6000 Series: Concepts and Architecture
TPC for Disk collects data from IBM or non-IBM networked storage devices that implement
SMI-S. A performance collection task collects performance data from one or more storage
groups of one device type. It has individual start and stop times, and a sampling frequency.
The sampled data is stored in DB2 database tables.
You can use TPC for Disk to set performance thresholds for each device type. Setting
thresholds for certain criteria enables TPC for Disk to notify you when a certain threshold has
been exceeded, so that you can take action before a critical event occurs. You can also
specify actions to be taken automatically. These may be just to log the occurrence or to trigger
an event. The settings can vary by individual device.
You can view performance data from the performance manager database in both graphical
and tabular forms. This is shown in Figure 14-4.
Figure 14-4 Example screenshot of TPC for Disk
The Volume Performance Advisor is an automated tool to help the storage administrator pick
the best possible placement of a new LUN to be allocated from a performance perspective. It
uses the historical performance statistics collected from the managed devices and locates
unused storage capacity on the SAN that exhibits the best estimated performance
characteristics. Allocation optimization involves several variables that are user controlled,
such as the required performance level and the time of day/week/month of prevalent access.
This function is fully integrated with the DM function.
For detailed information about the installation and use of the Performance Manager refer to
the redbook
IBM TotalStorage Multiple Device Manager Usage Guide, SG24-7097.