Key Terms; Before You Begin - HP XP7 User Manual

Migration: Auto LUN (contact HP technical support).
Partitioning: Cache Partition (HP XP7 Performance for Open and Mainframe Systems User
Guide)
Virtual storage: High Availability

Key terms

The following are provisioning key terms:
Term
access attributes
CV (variable volume)
expiration lock
FV
meta_resource
page
pool
pool threshold
pool-VOL, pool volume
resource group
subscription threshold
tier boundary
tier relocation
tiered storage

Before you begin

Before you begin provisioning your HP XP7 Storage, certain requirements must be met.
Description
Security function used to control the access to a logical volume. Access attributes are
assigned to each volume: read only, read/write, and protect.
Customized Volume. A fixed volume that is divided into arbitrary sizes.
Security option used to allow or not allow changing of the access attribute on a volume.
Abbreviation for fixed-sized volume.
A resource group in which additional resources (other than external volumes) and the
resources existing before installing Resource Partition belong.
In Thin Provisioning, a page is 42 MB of continuous storage in a THP V-VOL that belongs
to a THP-pool.
A set of volumes that are reserved for storing Thin Provisioning or Fast Snap write data.
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 for warning and
depletion.
A volume that is reserved for storing snapshot data for Fast Snap operations or write
data for Thin Provisioning.
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.
In a thin provisioned storage system, the proportion (%) of total THP V-VOL capacity
associated with the pool versus the total capacity.
You can set the percentage of THP V-VOL capacity that can be created to the total
capacity of the pool. This can help prevent THP V-VOL blocking caused by a full pool.
For example, when the subscription limit is set to 100%, the total THP V-VOL capacity
that can be created is obtained using this formula:
total THP V-VOL capacity <= pool capacity x 100%
Using this setting protects the pool when doing the following:
Shrinking a pool
Creating THP V-VOL
Increasing THP V-VOL capacity
The value of the reached maximum I/O counts that each tier can process.
A combination of determining the appropriate storage tier and migrating the pages to
the appropriate tier.
A storage hierarchy of layered structures of data drives consisting of different performance
levels, or tiers, that match data access requirements with the appropriate performance
tiers.
Key terms 21