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

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 (page 15).
Key terms
The following are provisioning key terms:
DescriptionTerm
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
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 38 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 Z 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 Z.
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
In a thin provisioned storage system, the proportion (%) of total V-VOL capacity associated
with the pool/pool capacity to the total capacity.
subscription threshold
You can set the percentage of V-VOL capacity that can be created to the total capacity
of the pool. This will prevent V-VOL blocking caused by a full pool.
For example, when the subscription limit is set to 100%, the total V-VOL capacity that
can be created is obtained using this formula:
total V-VOL capacity <= pool capacity x 100%
Using this setting protects the pool when doing the following:
• Shrinking a pool
• Creating V-VOLs
• Increasing V-VOL capacity
A group of TP-VOLs. The TP
pool consists of one or more
TP RAID groups.
A virtual device in the storage system. A VDEV is a group of logical volumes (LDEVs) in
a parity group. One parity group consists of multiple VDEVs. A VDEV usually includes
VDEV
some fixed volumes (FVs) and some redundant volumes (free spaces). The number of FVs
is determined by the emulation type.
A volume in which a fixed-sized volume is divided into arbitrary sizes.variable-sized volume (CV)
Before you begin
Before you begin provisioning your P9500 storage system, certain requirements must be met.
Key terms 13