HP XP P9500 Storage - Manual (Page 88)

Notes on setting tiering policy
•
If Auto is set as the execution mode, tier relocation is performed based on the monitoring
cycle. Therefore, when the tiering policy setting is changed, tier relocation will automatically
implement the tiering policy at the end of the current monitoring cycle (see Example 1 in
“Execution mode settings and tiering policy” (page 89) .
•
If Manual is set as the execution mode, you must manually perform performance monitoring,
issue a monitor stop, and then relocate a tier (see Example 2, Case 1, in
“Execution mode
settings and tiering policy” (page 89) ). If you change the tiering policy settings while obtaining
monitoring data, the monitoring data is used for the next tier relocation (see Example 2, Case
2, in
“Execution mode settings and tiering policy” (page 89) ). Therefore, you do not need to
perform new performance monitoring.
•
If the assignment of THP V-VOLs to a tiering policy causes the tier capacity to be exceeded,
then all the THP V-VOLs pages may not be allocated to the desired tier due to deficiency of
the a tier’s capacity. In this case, the pages that are not allocated to the desired tier are
88 Configuring thin provisioning