Basic Provisioning Workflow; Resource Group Strategies - HP XP7 User Manual

and I/O workload is balanced (each file is allocated to a different volume), then access
contention is reduced and access performance is improved.
2. In fixed-sized provisioning, all of the volume's capacity might not be used. Unused capacity
on the volume will remain inaccessible to other users. If the custom-sized feature is used,
smaller volumes can be created that do not waste capacity.
3. Applications that require the capacity of many fixed-sized volumes can instead be given fewer
large volumes to relieve device addressing constraints.
Depending on how the data was copied (for example using software such as TDMF, or internal
capability such as FlashCopy) the old device may need to be varied offline and the new device
varied online. This assumes that the source and target devices have been generated into the
mainframe IO configuration.
A disadvantage is that this manual intervention can become costly and tedious and this provisioning
strategy is appropriate only in certain scenarios.
When to use custom-sized provisioning
Use custom-sized provisioning when you want to manually control and monitor your storage
resources and usage scenarios.

Basic provisioning workflow

The following illustrates the basic provisioning workflow:
Virtual LVI software is used to configure custom-sized provisioning. For detailed information, see
"Configuring custom-sized provisioning" (page

Resource group 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 accidentally destroyed 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. Resource groups prevent the risk of data
leakage or data destruction by another storage administrator in another resource group.
Resources such as LDEVs, parity groups, external volumes or ports can be assigned to a resource
group. These resources can be combined to flexibly compose a virtual private storage system.
12 Introduction to provisioning
34).