3PAR InForm® OS 2.2.4 CLI Administrator's Manual (320-200113 Rev A, March 2009)

15.2
Overview
3PAR InForm OS CLI Administrator’s Manual InForm OS Version 2.2.4
15.10.2 Restarting a Dynamic Optimization Operation 15.14
15.1 Overview
The 3PAR Dynamic Optimization is an optional InForm OS feature that enables you to
dynamically tune volumes by changing volume parameters (for example, RAID levels, set sizes,
and disk filters). 3PAR Dynamic Optimization requires the use of the InForm CLI and also
requires a 3PAR Dynamic Optimization license.
15.2 Types of Virtual Volumes
There are three types of virtual volumes used in the InServ Storage Server. For detailed
information about each volume type, refer to the InForm OS Concepts Guide.
 Base Virtual Volumes (base VVs) - Base VVs are the root of all virtual and physical copy
operations, and are made up of three components: user space, snapshot data space, and
snapshot administration space. When base VVs are created, they can either be created with
their underlying logical disks or with their user space allocated from a Common
Provisioning Group (CPG).
 Thinly Provisioned Virtual Volumes (TPVVs) - TPVVs are base virtual volumes with only
snapshot data space and snapshot administration space that uses logical disks belonging to
a CPG.
 Commonly Provisioned Virtual Volumes (CPVVs) - CPVVs are virtual volumes that draw their
snapshot space from a CPG, which grows on demand, and the user space from the logical
disks that were created during the creation of the base volume.
In addition to these volume types there are also two derivatives of the base VV that are
created during copy operations. For detailed information about these copy types, refer to the
InForm OS Concepts Guide.
 Physical copies - Physical copies are point-in-time copies (snapshots) of virtual volumes.
 Virtual copies - Virtual copies are snapshots of virtual volumes (base VVs or another virtual
copy), which only record changes to the original volumes.