HP LeftHand P4000 SAN Solutions - Manual (Page 150)

Table 47 Information on the Use Summary tab (continued)
Description Category
The space saved by thin provisioning volumes. This space is calculated by the system. Thin Provisioning
Space saved by using SmartClone volumes is calculated using the amount of data in the clone
point and any snapshots below the clone point. Only as data is added to an individual
SmartClone volume does it consume space on the SAN. SmartClone Feature
Approximate total amount of space saved by using thin provisioning and SmartClone volumes. Total
Graph information
Amount of space allocated for volumes and snapshots. Provisioned
Amount of space remaining in the cluster that has not been allocated for storage. This value
decreases as volumes and snapshots are created, or as thinly provisioned volumes grow. Available
Combined space available in the cluster for storage volumes and snapshots. Total
This graph appears only if the cluster is over-provisioned. It displays the total space that volumes
and snapshots can grow to fill, and this value can exceed the physical capacity of the SAN. Provisionable
As an over-provisioned cluster approaches the physical capacity of the SAN, a series of
warnings displays on the Use Summary window.
Volume use summary
The Volume Use window presents detailed information about the volume characteristics that affect
the utilization of the cluster.
Table 48 Information on the Volume Use tab
Description Category
Name of the volume or snapshot. Name
The level of data protection configured for the volume. Snapshots inherit the data protection level of the
parent volume. Data
Protection
Level
Volumes can be either full or thin provisioned. The Provisioning column also details space saving options
for the different types of volumes you can create on the SAN, as shown in
Figure 74 (page 151) . The
Provisioning
space calculations take into account both the type of volume and the data protection level. Use this
information to help you manage space use on the SAN.
•
Thin provisioning saves space on the SAN by only allocating a fraction of the configured volume
size. Therefore, the space saved on the SAN is reflected in this column. As data is added to the
volume, thin provisioning grows the allocated space. You can expect to see the space saved number
decrease as data on the volume increases.
•
Full provisioning allocates the full amount of space for the size of the volume. Reclaimable space is
the amount of space that you can get back if this fully provisioned volume is changed to thinly
provisioned.
Amount of space used by actual data volumes or snapshots. The consumed space is the amount you
can regain if you delete the volume and its snapshots. If the volume has SmartClone clone points below Consumed
Space
it, the clone point and any snapshot below it comprise the Shared Space listed next to the consumed
space. To regain the Shared Space, you must delete the clone point and any snapshots below it. For
instructions on deleting clone points, see
“Deleting the clone point ” (page 196) .
Deleting files or data from client applications does not decrease the used space. For more information,
see
“Measuring disk capacity and volume size” (page 152) .
150 Provisioning storage