HP 3PAR StoreServ Concepts Guide: HP 3PAR OS 3.1.3

7000 Storage systems automatically detect the zeros and do not allocate space for them in the
physical copy. The result is a TPVV that is much smaller than the original volume.
Thin conversion tasks can be performed with the HP 3PAR CLI and the HP 3PAR Management
Console. See the HP 3PAR Command Line Interface Administrator's Manual and the HP 3PAR
Management Console Online Help for instructions on how to perform these tasks.
NOTE: Converting FPVVs to TPVVs with the thin-conversion feature requires an F-Class, T-Class,
StoreServ 10000, or StoreServ 7000 Storage system, an HP 3PAR Thin Provisioning license, and
an HP 3PAR Thin Conversion license. Contact your HP representative for more information.
HP 3PAR Thin Persistence Software
HP 3PAR Thin Persistence software is an optional feature that keeps TPVVs and read/write snapshots
of TPVVs small by detecting pages of zeros during data transfers and not allocating space for the
zeros. This feature works in real-time and analyzes the data before it is written to the source TPVV
or read/write snapshot of the TPVV. Freed blocks of 16 KB of contiguous space are returned to
the source volume; freed blocks of 128 MB of contiguous space are returned to the CPG for use
by other volumes.
To use thin persistence functions, you must have an F-Class, T-Class, StoreServ 10000, or StoreServ
7000 Storage system. The Thin Persistence feature is automatically enabled on F-Class, T-Class,
StoreServ 10000, and StoreServ 7000 Storage systems. Thin persistence tasks can be performed
with the HP 3PAR CLI and the HP 3PAR Management Console. See the HP 3PAR Command Line
Interface Administrator’s Manual and the HP 3PAR Management Console Online Help for instructions
on performing these tasks.
NOTE: Maintaining TPVV and read/write snapshot size with the Thin Persistence feature requires
an F-Class, T-Class, StoreServ 10000, or StoreServ 7000 Storage system, an HP 3PAR Thin
Provisioning license, an HP 3PAR Thin Conversion license, and an HP 3PAR Thin Persistence license.
Contact your HP representative for more information.
HP 3PAR Thin Copy Reclamation Software
HP 3PAR Thin Copy Reclamation software is an optional feature that reclaims space when snapshots
are deleted from a system. As snapshots are deleted, the snapshot space is reclaimed from a TPVV
or FPVV and returned to the CPG for reuse by other volumes. Deleted snapshot space can be
reclaimed from virtual copies, physical copies, or remote copies. The HP 3PAR Thin Copy
Reclamation feature works on any class of system. The HP 3PAR OS automatically reclaims snapshot
space if the HP 3PAR Virtual Copy, HP 3PAR Remote Copy, or HP 3PAR Thin Provisioning license
is enabled. For more information about snapshots, see “Virtual Copy Snapshots” (page 9).
NOTE: Reclaiming space when snapshots are deleted with the HP 3PAR Thin Copy Reclamation
feature requires the HP 3PAR Virtual Copy, HP 3PAR Remote Copy, or HP 3PAR Thin Provisioning
license. Contact your HP representative for more information.
HP 3PAR Virtual Lock Software
HP 3PAR Virtual Lock software is an optional feature that enforces the retention period of any
volume or copy of a volume. You must purchase the HP 3PAR Virtual Lock license to use this feature.
Locking a volume prevents the volume from being deleted, intentionally or unintentionally, before
the retention period elapses. You can use HP 3PAR Virtual Lock to specify the retention period for
each volume or copy of a volume.
HP 3PAR Adaptive Optimization Software
HP 3PAR Adaptive Optimization Software analyzes sub-volume, region-level disk access rates for
a given array over a scheduled period of time, and then performs a data migration of regions
between tiers according to a cost versus performance preference. Disk usage is optimized by
HP 3PAR Thin Persistence Software 57