HP XP Racks - Manual (Page 21)

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Migration: Auto LUN (contact HP Technical Support)
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Partitioning: Cache Partition (XP7 Performance for Open and Mainframe Systems User Guide)
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
Customized Volume. A fixed volume that is divided into arbitrary sizes. CV (variable volume)
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 Thin 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 Fast Snap 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 for warning and
depletion. pool threshold
A volume that is reserved for storing written 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
In a thin provisioned storage system, the proportion (%) of total THP-VOL capacity
associated with the pool versus the total capacity. subscription threshold
You can set the percentage of THP-VOL capacity that can be created to the total capacity
of the pool. This can help prevent THP-VOL blocking caused by a full pool.
For example, when the subscription limit is set to 100%, the total THP-VOL capacity that
can be created is obtained using this formula:
total THP-VOL capacity <= pool capacity x 100%
Using this setting protects the pool when doing the following:
• Shrinking a pool
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Creating THP-VOLs
• Increasing THP-VOL capacity
The value of the reached maximum I/O counts that each tier can process. tier boundary
A combination of determining the appropriate storage tier and migrating the pages to
the appropriate tier. tier relocation
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. tiered storage
A virtual device in the storage system. A VDEV is a group of logical volumes (LDEVs or
logical units) in a parity group. One parity group consists of multiple VDEVs. A VDEV VDEV
usually includes some fixed volumes (FVs) and some free spaces. The number of FVs is
determined by the emulation type.
Before you begin
Before you begin provisioning your HP XP7 Storage, certain requirements must be met.
Key terms 21