HP XP P9500 Storage - Manual (Page 125)

pool allocation rates). You can then use this monitor information to tune the appropriate
allocation.
◦ Access frequency of THP V-VOL, read hit rates, and write hit rates (using Performance
Monitor)
◦ Usage rates of property groups of pools (using Performance Monitor)
◦ Pool usage and elapsed time of pool usage (using Command View Advanced Edition).
◦ THP V-VOL usage (stored data rates) and elapsed time of pool usage (using Command
View Advanced Edition).
◦ Smart Tiers performance monitoring of pool storage
•
Possible tuning actions (without Smart Tiers). The following techniques using ShadowImage
or Hitachi Tiered Storage Manager will move a THP V-VOL.
◦ The THP V-VOL is copied using Business Copy from a pool with an I/O bottleneck. For
more information, see HP P9000 Business Copy User Guide.
◦
When normal volumes exist in the same parity group as the pool-VOL, Hitachi Tiered
Storage Manager can be used to move the normal volume to another parity group that
is not shared with a pool-VOL. For more information, see Hitachi Storage Command Suite
Hitachi Tiered Storage Manager User Guide (MK-94HC090).
◦ Business Copy copies a THP V-VOL with a high I/O load to a pool with a lower access
level to adjust the pool load.
Managing I/O usage rates example
The following figure illustrates an example of managing I/O usage rates. To manage I/O and
adjust the pool load, you can use:
•
Business Copy to copy a THP V-VOL with a high load to an under-utilized pool.
•
Hitachi Tiered Storage Manager to migrate the THP V-VOL data with a higher load to a pool
with extra performance capability.
Monitoring capacity and performance 125