Class CIM_StorageSetting


CIM_ManagedElement
\_CIM_SettingData


Description

StorageSetting is roughly equivalent to a Service Level Agreement (SLA) It defines the characteristics, qualities of service and goals when used in a CreateOrModifyElement FromStoragePool or CreateOrModifyStoragePool method in the StorageConfigurationService. It specifies a series of properties with Maximum and Minimum values that define the (inclusive) bounds that the object should maintain. Note that the setting is associated to a StorageVolume or LogicalDisk, using ElementSetting.The use of these properties differs depending on whether the StorageSetting instance is being used as a goal for a configuration operation or being used as a Service Level Agreement for a created Volume. In addition the properties fall into two categories: The QOS properties(PackageRedundancy, Data Redundancy,&NoSinglePointOfFailure) and the Detailed RAID properties(ExtentStripeLength, ParityLayout, and UserDataStripeDepth). In a Setting used as a goal, the QOS properties are required as a set; The Detailed RAID properties(if supported as indicated by the scoping StorageCapabilities instance) may be used optionally in any combination. The implementation MUST supply it's own best practice in the case where one or more supported RAID properties are not supplied. In this situation the use of StorageSettingWithHints can be useful to provide direction to the implementation.In a Setting used as a service agreement for a Volume, the QOS properties reflect the Service Level Agreement, with goal, min,&max. The actual current service level is exposed by corresponding values in StorageExtent.The Detailed RAID properties, by contrast, reflect specific values that reflect the RAIDconstruction of the Volume. Only the primary values are meaningful; Min and Max are set to match.Certain StorageSetting instances may be classed as"Fixed", by using the"ChangeableType"property, indicating the setting is preset. Such settings are used when the possible setting variations are low enough to be instantiated in their entirety. The StorageCapabilities"CreateSetting"method MAY NOT be used to return settings that are not changeable.Other StorageSetting instances are created using the"CreateSetting"method. If the capabilities specifies ranges, then the setting can be used by a client to narrow the range to particular values within the range. In other words, the capabilities MAY be broad, but the related setting MUST be as capable or less capable, that is more narrowly defined, before it is used to create or modify resources.These created StorageSetting instances MUST have their"ChangeableType"property = 1,"Changeable - Transient".GeneratedSettings MAY not remain after the restart or reset of the implementation. They may be deleted by implementation at any time. A reasonable minimal time to retain the generated transient settings is five minutes, although there is no minimal retention time.

Subclasses

IBMTSDS_DataTypeSetting IBMTSDS_ExtentTypeSetting IBMTSDS_RAIDSetting IBMTSDS_RAIDVSFormatSetting

Referenced By

CIM_StorageCapabilities CIM_StorageConfigurationService CIM_StoragePool CIM_StorageSettingsAssociatedToCapabilities IBMTSDS_ArrayPool IBMTSDS_ArraySitePool IBMTSDS_PrimordialStoragePool IBMTSDS_RankPool IBMTSDS_StorageConfigurationService

Properties

IdTypeRangeDescription
Key
InstanceID string
Within the scope of the instantiating Namespace, InstanceID opaquely and uniquely identifies an instance of this class. 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 that is creating or defining the InstanceID or that is a registered ID assigned to the business entity by a recognized global authority. (This requirement 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 reused to identify different underlying (real-world) elements. If the above"preferred"algorithm is not used, the defining entity must assure thatthe resulting InstanceID is not reused across any InstanceIDs produced by this or other providers for the NameSpace of this instance.For DMTF-defined instances, the"preferred"algorithm must be used with the<OrgID>set to CIM.
Read Only
ChangeableType uint16
Fixed - Not Changeable0
Changeable - Transient1
Changeable - Persistent2
Enumeration indicating the type of setting."Fixed - Not Changeable"settings are primordial. These setting are defined at the implementor of the class."Changeable - Transient"is the type of setting produced by the"CreateSetting"method. A client can subsequently request that the implementation persist the generated and potentially modified setting indefinately. Only a"Changeable - Transient"setting SHALL be converted to a"Changeable = Persistent"setting; the setting SHALL NOT be changed back.
IncrementalDeltas boolean
True indicates delta replicas associated with the source element associated with this settingdata are incrementally dependent. Only the oldest replica in the set may be deleted or resynced.
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 delta storage. 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.
PersistentReplica boolean
True indicates the associated replicas persist during power off or system reset. False indicates replicas lost during these events.
SpaceLimit uint64
SpaceLimit is the consumption limit for the allocated storage element from all associated StoragePools. If asserted, then the assumption is that the storage element can grow, (for instance an element representing the storage for a delta replica).If SpaceLimit is greater than zero, the space consumed by the storage element shall not exceed the value of SpaceLimit.If SpaceLimit = 0 (the default) then no limits are asserted on the amount of space consumed.
SpaceLimitWarningThreshold uint16
If the associated storage element may dynamically consume an increasing amount of space and a space limit is enforced on the element, then a non-zero warning threshold percentage indicates when a warning indication should be generated based on the total amount of space consumed being>= (SpaceLimit*SpaceLimitWarningThreshold)/100.
Read Write
DataRedundancyGoal uint16
DataRedundancyGoal describes the desired number of complete copies of data to be maintained. Examples would be RAID 5 where 1 copy is maintained and RAID 1 where 2 or more copies are maintained. Possible values are 1 to n. The bounds (max and min) for redundancy are defined using the properties, DataRedundancyMax and DataRedundancyMin.
DataRedundancyMax uint16
DataRedundancyMax describes the maximum number of complete copies of data to be maintained. Examples would be RAID 5 where 1 copy is maintained and RAID 1 where 2 or more copies are maintained. Possible values are 1 to n. The desired redundancy is specified using DataRedundancyGoal, while the minimum is defined by DataRedundancyMin.
DataRedundancyMin uint16
DataRedundancyMin describes the minimum number of complete copies of data to be maintained. Examples would be RAID 5 where 1 copy is maintained and RAID 1 where 2 or more copies are maintained. Possible values are 1 to n. The desired redundancy is specified using DataRedundancyGoal, while the maximum is defined by DataRedundancyMax.
DeltaReservationGoal uint8
DeltaReservationGoal is a number between 1 (1%) and a 100 (100%) which specifies the desired amount of space that should be reserved in a replica for caching changes. For a complete copy this would be 100%. The bounds (max and min) for the reservation are defined using the properties, DeltaReservationMax and DeltaReservationMin.
DeltaReservationMax uint8
DeltaReservationMax is a number between 1 (1%) and a 100 (100%) which specifies the maximum amount of space that should be reserved in a replica for caching changes. For a complete copy this would be 100%. The desired reservation is specified using DeltaReservationGoal, while the minimum is defined by DeltaReservationMin.
DeltaReservationMin uint8
DeltaReservationMin is a number between 1 (1%) and a 100 (100%) which specifies the minimum amount of space that should be reserved in a replica for caching changes. For a complete copy this would be 100%. The desired reservation is specified using DeltaReservationGoal, while the maximum is defined by DeltaReservationMax.
ExtentStripeLength uint16
ExtentStripeLength describes the number of underlying StorageExtents across which data is striped in the common striping-based storage organizations. This is also known as the number of'members'or'columns'. When used in a goal setting instance, ExtentStripeLength is the optimal desired value. The bounds (max and min) for Stripe Length are defined using the properties ExtentStripeLengthMax and ExtentStripeLengthMin. ExtentStripeLength MUST be set to NULL if the scoping StorageCapablities indicates that it is not supported in this context. ExtentStripeLength can be used in conjunction with CreateOrModifyElementFromELements to explicitly configure storage. An example would be RAID 0+1 with mirroring two stripe sets, each set being three wide. In this case CreateOrModifyElementFromElements would be passed a goal setting with DataRedundancy = 2 and ExtentStripeLength = 3. The size of the InElements array would be 6 and would contain the StorageExtents to be used to construct the StorageElement as a RAID 0+1. ExtentStripeLengthMin and ExtentStripeLengthMax are meaningless and wouldbe set to NULL. If the property is supported, and is part of StorageSettingWithHints it MAY be set to NULL. If used it will constrain the effects of Hint selections. When used in a Setting instance associated to a Volume, this property indicates the specific value that the Volume was created with, and ExtentStripeLengthMin and ExtentStripeLengthMax will be set to the same specific value.
ExtentStripeLengthMax uint16
ExtentStripeLength describes the number of underlying StorageExtents across which data is striped in the common striping-based storage organizations. This is also known as the number of'members'or'columns'. When used in a goal setting instance, ExtentStripeLengthMax is the maximum acceptable value. The desired Stripe Length is specified using ExtentStripeLength, while the minimum is defined by ExtentStripeLengthMin. ExtentStripeLengthMax MUST be set to NULL if the scoping StorageCapablities indicates that it is not supported in this context. If the property is supported, and is part of StorageSettingWithHints it MAY be set to NULL. If used it will constrain the effects of Hint selections. When used in a Setting instance associated to a Volume, this property is set to the specific value of ExtentStripeLength.
ExtentStripeLengthMin uint16
ExtentStripeLength describes the number of underlying StorageExtents across which data is striped in the common striping-based storage organizations. This is also known as the number of'members'or'columns'. When used in a goal setting instance, ExtentStripeLengthMin is the minimum acceptable value. The desired Stripe Length is specified using ExtentStripeLength, while the maximum is defined by ExtentStripeLengthMax. ExtentStripeLengthMin MUST be set to NULL if the scoping StorageCapablities indicates that it is not supported in this context. If the property is supported, and is part of StorageSettingWithHints it MAY be set to NULL. If used it will constrain the effects of Hint selections. When used in a Setting instance associated to a Volume, this property is set to the specific value of ExtentStripeLength.
InitialSynchronization uint16
Not Applicable0
Not Managed1
Start2
Do Not Start3
DMTF Reserved..
Vendor Specific0x8000..
Not Applicable indicates that this property is not applicable to the associated storage element. Other values indicate whether or not a source element should be fully copied to a target element at the time the replication is initiated. The provider does not have to comply with the client request. These other values are defined as:-"Not Managed": to start or not at initiation is up to the implementation.-"Start": start replication on initiation.-"Do Not Start": do not start replication on initiation.
IntendedUsage uint16
Not Specialized0
Delta Pool2
Delta Pool Component3
Remote Mirror4
Local Mirror5
Full Snapshot6
Delta Snapshot7
Replication Buffer8
DMTF Reserved..
Vendor Specific0x8000..
Describes the use of the storage elements associated with this SettingData instance. Values:Not specialized. (default)Special pool for delta replica elementsComponent extent for delta replica poolCreating remote mirror target elementCreating local mirror target elementCreating full snapshot target elementCreating delta snapshot target elementCreating remote replication buffer element
NoSinglePointOfFailure boolean
Indicates the desired value for No Single Point of Failure. Possible values are false = single point of failure, and true = no single point of failure.
PackageRedundancyGoal uint16
PackageRedundancyGoal describes the desired number of redundant packages to be used. For example, in the storage domain, package redundancy describes how many disk spindles can fail without data loss including, at most, one spare. An example would be RAID5 with a spare disk which would have a PackageRedundancy of 2. Possible values are 0 to n. The bounds (max and min) for redundancy are defined using the properties, PackageRedundancyMax and PackageRedundancyMin.
PackageRedundancyMax uint16
PackageRedundancyMax describes the maximum number of redundant packages to be used. For example, in the storage domain, package redundancy describes how many disk spindles can fail without data loss including, at most, one spare. An example would be RAID5 with a spare disk which would have a PackageRedundancy of 2. Possible values are 0 to n. The desired redundancy is specified using PackageRedundancyGoal, while the minimum is defined by PackageRedundancyMin.
PackageRedundancyMin uint16
PackageRedundancyMin describes the minimum number of redundant packages to be used. For example, in the storage domain, package redundancy describes how many disk spindles can fail without data loss including, at most, one spare. An example would be RAID5 with a spare disk which would have a PackageRedundancy of 2. Possible values are 0 to n. The desired redundancy is specified using PackageRedundancyGoal, while the maximum is defined by PackageRedundancyMax.
ParityLayout uint16
Non-rotated Parity1
Rotated Parity2
ParityLayout specifies whether a parity-based storage organization is using rotated or non-rotated parity. When used in a goal setting instance, ParityLayout is the desired value. It MUST be set to NULL if the scoping StorageCapablities indicates that it is not supported in this context. If the property is supported, and is part of StorageSettingWithHints it MAY be set to NULL. If used it will constrain the effects of Hint selections. When used in a Setting instance associated to a Volume, this property indicates the specific value that the Volume was created with.
ReplicationPriority uint16
Not Applicable0
Not Managed1
Low2
Same3
High4
DMTF Reserved..
Vendor Specific0x8000..
Not Applicable indicates that this property is not applicable to the associated storage element. Other values indicate the relative priority of background Replication I/O operations relative to host I/O operations. These other values are:-"Low": Replication engine I/O lower priority than host I/O.-"Same": Replication engine I/O has the same priority as host I/O.-"High": Replication engine I/O has higher priority than host I/O.
UserDataStripeDepth uint64
UserDataStripeDepth describes the number of bytes forming a strip in common striping-based storage organizations. The strip is defined as the size of the portion of a stripe that lies on one extent. Thus, ExtentStripeLength * UserDataStripeDepth will yield the size of one stripe of user data. When used in a goal setting instance, UserDataStripeDepth is the optimal desired value. The bounds (max and min) for Stripe Depth are defined using the properties UserDataStripeDepthMax and UserDataStripeDepthMin. UserDataStripeDepth MUST be set to NULL if the scoping StorageCapablities indicates that it is not supported in this context. If the property is supported, and is part of StorageSettingWithHints it MAY be set to NULL. If used it will constrain the effects of Hint selections. When used in a Setting instance associated to a Volume, this property indicates the specific value that the Volume was created with, and UserDataStripeDepthMin and UserDataStripeDepthMax will be set to the same specific value.
UserDataStripeDepthMax uint64
UserDataStripeDepth describes the number of bytes forming a strip in common striping-based storage organizations. The strip is defined as the size of the portion of a stripe that lies on one extent. Thus, ExtentStripeLength * UserDataStripeDepth will yield the size of one stripe of userdata. When used in a goal setting instance, UserDataStripeDepthMax is the maximum acceptable value. The desired Stripe Depth is specified using UserDataStripeDepthGoal, while the minimum is defined by UserDataStripeDepthMin. UserDataStripeDepthMax MUST be set to NULL if the scoping StorageCapablities indicates that it is not supported in this context. If the property is supported, and is part of StorageSettingwWithHints it MAY be set to NULL. If used it will constrain the effects of Hint selections. When used in a Setting instance associated to a Volume, this property is set to the specific value of UserDataStripeDepth.
UserDataStripeDepthMin uint64
UserDataStripeDepth describes the number of bytes forming a strip in common striping-based storage organizations. The strip is defined as the size of the portion of a stripe that lies on one extent. Thus, ExtentStripeLength * UserDataStripeDepth will yield the size of one stripe of user data. When used in a goal setting instance, UserDataStripeDepthMin is the minimum acceptable value. The desired Stripe Depth is specified using UserDataStripeDepth, while the maximum is defined by UserDataStripeDepthMax. UserDataStripeDepthMin MUST be set to NULL if the scoping StorageCapablities indicates that it is not supported in this context. If the property is supported, and is part of StorageSettingWithHints it MAY be set to NULL. If used it will constrain the effects of Hint selections. When used in a Setting instance associated to a Volume, this property is set to the specific value of UserDataStripeDepth.
UseReplicationBuffer uint16
Not Applicable0
Not Managed1
Use Buffer2
Do Not Use Buffer3
DMTF Reserved..
Vendor Specific0x8000..
"Not Applicable"indicates that this property is not applicable to the associated storage element. Other values indicate whether or not remote mirror pair created with SynchronizationType"Async"is allowed to use a write buffer for asynchronous buffering. These other values are defined as:-"Not Managed": use or not of the buffer is up to the implementation.-"Use Buffer": use of a buffer for logging is required.-"Do Not Use Buffer": a buffer for logging shall not be used.
 
Inherited from class CIM_ManagedElement
Caption, Description, ElementName
 
Inherited from class CIM_SettingData
ElementName
 

Method Summary

NameDescription
 

Method Detail