Class CIM_StoragePool


CIM_ManagedElement
\_CIM_ManagedSystemElement
  \_CIM_LogicalElement


Description

A StoragePool is a conglomeration of storage capacity for the purpose of assignment and allocation based on service characteristics, such as location, available space or other criteria (for example, cost per megabyte or hardware ownership). A StoragePool is managed within the scope of a particular System. StoragePools may consist of component StoragePools or StorageExtents. StorageExtents that belong to the StoragePool have a Component relationship to the StoragePool. StorageExtents/StoragePools that are elements of a pool have their available space aggregated into the pool. StoragePools, StorageVolumes and LogicalDisks may be created from StoragePools. This is indicated by the AllocatedFromStoragePool association. StoragePool is scoped to a system by the HostedStoragePool association.

Subclasses

IBMTSDS_ArrayPool IBMTSDS_ArraySitePool IBMTSDS_ExtentPool IBMTSDS_PrimordialStoragePool IBMTSDS_RankPool IBMTSDS_VirtualPool

Referenced By

CIM_AllocatedFromStoragePool CIM_HostedStoragePool CIM_StorageConfigurationService IBMTSDS_StorageConfigurationService IBMTSDS_VolumeAllocatedFromStoragePoolView SNIA_AllocatedFromStoragePoolView

Properties

IdTypeRangeDescription
Key
InstanceID string
Within the scope of the instantiating Namespace, InstanceID opaquely and uniquely identifies an instance of this class. In order to ensure uniqueness within the NameSpace, the value of InstanceID SHOULD be constructed using the following'preferred'algorithm:<OrgID>:<LocalID>Where<OrgID>and<LocalID>are separated by a colon':', and where<OrgID>MUST include a copyrighted, trademarked or otherwise unique name that is owned by the business entity creating/defining the InstanceID, or is a registered ID that is assigned to the business entity by a recognized global authority (This is similar to the<Schema Name>_<Class Name>structure of Schema class names.) In addition, to ensure uniqueness<OrgID>MUST NOT contain a colon (':'). When using this algorithm, the first colon to appear in InstanceID MUST appear between<OrgID>and<LocalID>.<LocalID>is chosen by the business entity and SHOULD not be re-used to identify different underlying (real-world) elements. If the above'preferred'algorithm is not used, the defining entity MUST assure that the resultant InstanceID is not re-used acrossany InstanceIDs produced by this or other providers for this instance's NameSpace.For DMTF defined instances, the'preferred'algorithm MUST be used with the<OrgID>set to'CIM'.
Read Only
LowSpaceWarningThreshold uint16
LowSpaceWarningThreshold simplifies the creation of a pool specific Indication based on RemainingManagedSpace<=(TotalManagedSpace*LowSpaceWarningThreshold)/100. One example client for an Indication based on this property is a delta copy implementation where the pool enables continuous, variable space consumption for the deltastorage. Another example client for an Indication based on this property is a provisioning manager implementing a policy for adding storage to a pool when it becomes low.
PoolID string
Max Length256
A unique name in the context of the System that identifies this pool.
Primordial boolean
If true,"Primordial"indicates that this StoragePool is the base from which storage capacity is drawn and returned in the activity of storage management. Being primordial means that this StoragePool shall not be created or deleted by consumers of this model. However, other actions, modeled or not, may affect the characteristics or size of primordial StoragePools. If false,"Primordial"indicated that the StoragePool, a concrete Storage Pool, is subject to storage services functions. This distinction is important because higher-level StoragePools may be assembled using the Component or AllocatedFromStoragePool associations. Although the higher-level abstractions can be created and deleted, the most basic, (i.e. primordial), hardware-based StoragePools cannot. They are physically realized as part of the System, or are actually managed by some other System and imported as if they were physically realized.
RemainingManagedSpace uint64
The remaining usable capacity after the allocation of StorageVolumes, LogicalDisks, or child Storage Pools. This property is maintained here to provide efficient access to this information. However, note that it is possible to compute RemainingManagedSpace as (TotalManagedSpace minus the sum of SpaceConsumed from all of the AllocatedFromStoragePool references from this StoragePool). Note that SpaceConsumed remains useful to determine the amount of capacity consumed by a particular allocated element.
TotalManagedSpace uint64
The total amount of capacity usable for the allocation of StorageVolumes, LogicalDisks, or child Storage Pools.For primordial Storage Pools, this capacity reflects the usable capacity of Disk Drives or LUNs, for example, to the owning storage device or application. For example, in storage array, a primordial Storage Pool's TotalManagedSpace does not include metadata such as the disk label area and absolute disk drive capacity lost in disk formatting.For concrete Storage Pools, the same applies, but the metadata not included in TotalManagedSpace is consumed in virtualization like RAID and concatenation. Concrete Storage Pool may also be simple reserve of capacity. In such a case, no capacity may be lost in formation of the Storage Pool.Conceptually TotalManagedSpace reflects all storage known via Component associations to underlying StorageExtents or via AllocatedFromStoragePool associations to underlying StoragePools. However, note some of these underlying storage may not be modeled by the instrumentation.
Read Write
 
Inherited from class CIM_ManagedElement
Caption, Description, ElementName
 
Inherited from class CIM_ManagedSystemElement
HealthState, InstallDate, Name, OperationalStatus, Status, StatusDescriptions
 

Method Summary

NameDescription
GetAvailableExtentsThis method can be used to retrieve a list of available Extents that may be used in the creation or modification of a StoragePool, StorageVolume, or LogicalDisk.
GetSupportedSizeRangeFor pools that that support a range of sizes for volume or pool creation, this method can be used to retrieve the supported range.
GetSupportedSizesFor pools that support discrete sizes for volume or pool creation, this method can be used to retrieve a list of supported sizes.
 

Method Detail


GetAvailableExtents

Description

This method can be used to retrieve a list of available Extents that may be used in the creation or modification of a StoragePool, StorageVolume, or LogicalDisk. The GetAvailableExtents method MUST return the Extents from the set of Component Extents of the Pool on which the method is being invoked. The returned Extents are available at the time the method returns. There is no guarantee that the same Extents will be available later. This method MUST return the Extents that are not being used as supporting capacity for any other Pools, Volumes, or LogicalDisks that have been allocated from this Pool. The Extent returned MUST be a component Extent of the Pool or subdivisions of a component Extent, the subdivisions themselves represented as Extents.

Parameters

IdTypeRangeDescription
In
Goal CIM_StorageSetting
The StorageSetting (Goal) for which supported extents should be retrieved as available.If a NULL is passed for the Goal, the method will return all available extents, regardless of the goal. There exists a possibility of error in creating a Pool, Volume, or LogicalDisk retrieved in this manner.
AvailableExtents CIM_StorageExtent
List of references to available StorageExtents, or subclass instances.
out
AvailableExtents CIM_StorageExtent
List of references to available StorageExtents, or subclass instances.
Return Codes
none

GetSupportedSizeRange

Description

For pools that that support a range of sizes for volume or pool creation, this method can be used to retrieve the supported range. Note that different pool implementations may support either or both the GetSupportedSizes and GetSupportedSizeRanges methods at different times, depending on Pool configuration. Also note that the advertised sizes may change after the call due to requests from other clients. If the pool currently only supports discrete sizes, then the return value will be set to 1.

Parameters

IdTypeRangeDescription
In
ElementType uint16
The type of element for which supported size ranges are reported for.
Goal CIM_StorageSetting
The StorageSetting for which supported size ranges should be reported for.
out
MinimumVolumeSize uint64
The minimum size for a volume/pool in bytes.
MaximumVolumeSize uint64
The maximum size for a volume/pool in bytes.
VolumeSizeDivisor uint64
A volume/pool size must be a multiple of this value which is specified in bytes.
Return Codes
none

GetSupportedSizes

Description

For pools that support discrete sizes for volume or pool creation, this method can be used to retrieve a list of supported sizes. Note that different pool implementations may support either or both the GetSupportedSizes and GetSupportedSizeRanges methods at different times, depending on Pool configuration. Also note that the advertised sizes may change after the call due to requests from other clients. If the pool currently only supports a range of sizes, then the return value will be set to 1.

Parameters

IdTypeRangeDescription
In
ElementType uint16
The type of element for which supported sizes are reported for.
Goal CIM_StorageSetting
The StorageSetting for which supported sizes should be reported for.
out
Sizes uint64
List of supported sizes for a Volume/Pool creation or modification.
Return Codes
none