HP XP P9500 Storage - Manual (Page 24)

Data retention strategies
After provisioning your system, you can assign access attributes to open-system volumes to protect
the volume against read, write, and copy operations and to prevent users from configuring LU
paths and command devices. Use the Data Retention to assign access attributes.
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.
The resources such as LDEVs, parity groups, external volumes, ports, or host groups, can be assigned
to a resource group. These resources can be combined to flexibly compose a virtual private storage
system, much like sharing a port in two organizations but not in a parity group.
Resource groups should be planned and created before creating volumes. For more information,
see
“Configuring resource groups” (page 27) .
Key terms
The following are provisioning key terms:
Description Term
Security function used to control the access to a logical volume. Access attributes are
assigned to each volume: read only, read/write, and protect. access attributes
Security option used to allow or not allow changing of the access attribute on a volume. expiration lock
Abbreviation for fixed-sized volume. FV
Logical Unit Size Expansion (LUSE). LUSE
A set of LDEVs defined to one or more hosts as a single logical unit (LU). A LUSE volume
can be a concatenation of two to 36 LDEVs that are then presented to a host as a single
LU. LUSE volume
A resource group in which additional resources (other than external volumes) and the
resources existing before installing Resource Partition belong. meta_resource
In provisioning, a page is 42 MB of continuous storage in a THP V-VOL that belongs to
a THP-pool. page
A set of volumes that are reserved for storing Thin Provisioning or Snapshot write data. pool
In a thin provisioned storage system, the proportion (%) of used capacity of the pool to
the total pool capacity. Each pool has its own pool threshold values that are divided into
a variable threshold and a fixed threshold. pool threshold
A logical volume that is reserved for storing snapshot data for Snapshot operations or
write data for Thin Provisioning. pool-VOL, pool volume
A group that is assigned one or more resources of the storage system. The resources that
can be assigned to the resource group are LDEV IDs, parity groups, external volumes,
ports, and host group IDs. resource group
24 Introduction to provisioning