HP P9000 Provisioning for Mainframe Systems User Guide (AV400-96369, October 2011)

The example on the left (Today), before installing Thin Provisioning Z software, shows higher starting
cost because a larger amount of physical disk capacity is purchased to configure the entire volume
capacity. Much of this hardware-centric capacity is unused at the start. Over time, you will have
to reconfigure the storage based on the volume capacity to be consumed, for example, if the
volume capacity exceeds 80% after one year.
The example on the right (Future), after installing Thin Provisioning Z software, shows lower starting
costs for purchasing minimal volume capacity. Additional physical disk capacity can be purchased
and installed only when more physical storage is required, indicated by a system alert. This software
approach allows the volumes to be used effectively. Reconfiguring the storage system can be
eliminated so that operations can continue without service interruptions.
Thin Provisioning Z work flow
The following illustrates the Thin Provisioning Z workflow.
Resource groups strategies
A storage system can connect to multiple hosts and be shared by multiple divisions in a company
or by multiple companies. Many storage administrators from different organizations can access
the storage system. Managing the entire storage system can become complex and difficult. Potential
problems are that private data might be accessed by other users, or a volume in one organization
might be destroyed by mistake or by incorrect operation by a storage administrator in another
organization.
To avoid such problems, use Resource Partition to set up resource groups that allow you to manage
one storage system as multiple virtual private storage systems. The storage administrator in each
resource group can access only their assigned resources and cannot access other resources.
Configuring resource groups prevents the risk of data leakage or data destruction by another
storage administrator in another resource group.
12 Introduction to provisioning