HP XP24000/XP20000 Thin Provisioning Software User Guide (T5227-96015, November 2011)

Figure 3 Sample Pool Information
You can use both XP Performance Advisor and Performance Monitor to collect I/O data on V-VOL
and pool usage:
• Using XP Performance Advisor:
The current used pool capacity and the chronological changes in the used pool capacity◦
◦ The current used V-VOL capacity (ratio of the stored data) and the chronological changes
in the used V-VOL capacity
• Using Performance Monitor:
Frequency of V-VOL access, read hit ratio, and write hit ratio◦
◦ Pool I/O rates in the parity group
Figure 4 (page 12) shows management of usage levels and operation information.
Figure 4 Managing Usage Rates and I/Os
Full Pool Handling
Full Pool conditions can be managed in two ways. The difference between the two handling
methods is how a V-VOL is treated if it requires new pool capacity when no capacity is available.
12 About XP Thin Provisioning Operations