Pools Historical Capacity report

Shows the usage of space on storage pools over a specified period. Use the report to analyze changes in your storage pool requirements.

Charts

The chart shows the following space statistics for the pool on a storage system:
  • The capacity of the pool
  • The used space in the pool
  • The available space in the pool
  • The virtual volume capacity of the pool
  • The used volume space in the pool
  • The allocated space in the pool
The chart shows the following space statistics for the pool in the storage resource group:
  • The capacity of the pools
  • The used space in the pools
  • The available space in the pools
  • The virtual volume capacity of the pools
  • The used volume space in the pools
  • The allocated space in the pool

Report output

The following information is included in reports for a pool on a storage system or for pools in a storage resource group:

Storage System Name
A user-defined name of the storage system. If a name was not defined, IBM Spectrum Control shows the name that was defined when the storage system was added for monitoring.
Storage System Configuration
Shows whether a storage system is configured as back-end storage or configured to virtualize back-end storage. If this value is Storage System, the storage system is configured as back-end storage. If this value is Storage Virtualizer, the storage system is configured to virtualize back-end storage.
Storage Pool Name
The name that was assigned to the pool when it was added to the system.
Date
The date that the data was collected for the report.
Storage System Pool Capacity (GiB)
The amount of storage space in pools that are on the storage system. For an XIV or IBM Storage Accelerate, this value represents the physical capacity of the pool, not the virtual capacity. For other storage systems, this value might also include overhead space if the pool is unformatted.
Storage Pool Available Space (GiB)
The amount of unused space that is not reserved for volumes in pools that are on the storage system.
IBM Spectrum Control uses the following formula to determine this value:
pool capacity - used space
For XIV systems and IBM Storage Accelerate, this value represents the unallocated physical space in the pool, not the unallocated virtual space. For some storage systems, this value usually includes only the usable capacity, but might also include overhead space if the pool is unformatted.
Storage Pool Allocated Space (GiB)
The amount of space that is reserved for all the volumes in a pool, which includes both thin-provisioned and standard volumes. The space that is allocated for thin-provisioned volumes is less than their virtual capacity, which is shown in the Storage Pool Total Volume Capacity (GiB) property. If a pool does not contain thin-provisioned volumes, this value is the same as the value in the Storage Pool Total Volume Capacity (GiB) property. This value is equal to the value in the Storage Pool Used Volume Space (GiB) property for the following resources:
  • Resources other than those that are running IBM Storage Virtualize and are configured as back-end storage
  • Resources that are running IBM Storage Virtualize, are configured as back-end storage, and are not thin-provisioned
Storage Pool Used Space (GiB)
The amount of storage space that is used in the pool.
Storage Pool Total Volume Capacity (GiB)
The total storage space on all the volumes in a pool, which includes thin-provisioned and standard volumes. For thin-provisioned volumes, this value includes virtual space.
Storage Pool Used Volume Space (GiB)
The amount of allocated space that is used by the volumes in a pool, which includes thin-provisioned and standard volumes.
For resources that are running IBM Storage Virtualize, you can preallocate thin-provisioned volume space when volumes are created. For these resources, the Storage Pool Used Space might be different than the Storage Pool Allocated Space for pools that contain thin-provisioned volumes. In other cases, the values for Storage Pool Used Space and Storage Pool Allocated Space are equal.
This value is accurate as of the most recent time that IBM Spectrum Control collected data about a volume. The value in this property might not be 100% accurate for the current state of volumes. This inaccuracy might occur because data collection is run on a set schedule and the used space on volumes can change rapidly.
Storage Pool Assigned Volume Space (GiB)
The amount of space in the pool that is on volumes that are assigned to a server or storage virtualizer.
Storage Pool Unassigned Volume Space (GiB)
The amount of volume space in the pool that is not assigned to a server or storage virtualizer.
Storage Pool Real Configured Space (GiB)
The amount of storage space that is in pools that have an associated soft size on an XIV or IBM Storage Accelerate. The soft size of a pool is the virtual size of a thin-provisioned pool.
Storage System MDisk Available Space (GiB)
The amount of storage space that is available on a managed disk. This value is only available for resources that are running IBM Storage Virtualize and are configured as back-end storage.
Storage Pool Number of MDisks
The number of managed disks in a storage pool.
Storage Pool Number of Storage Volumes
The number of volumes in the storage pool.