Class CIM_SCSIMultipathConfigurationCapabilities
extends CIM_Capabilities

A class derived from CIM_Capabilities that models the capabilities of a multipath driver. Note that 'path' in this context refers to end-to-end device paths (for example, SCSI initiator/target) with no understanding of edge paths between interconnect elements such as switches. Load balancing only applies to symmetric multipath devices or to the ports in SCSITargetPortGroups in active access state. A driver may support different algorithms for load balancing. A few common algorithms are listed. Algorithms for specific device models and software vendor specific algorithms are also accommodated. An instance of this capabilities class MUST be instantiated whenever SCSIPathConfigurationService is instantiated and they MUST be assocaited one to one using ElementCapabilities. Multiple instances of the service/acapabilities pair MAY exist if multiple multipath drivers are installed. Each LogicalDevice subclass served by the underlying multipath driver is associated to the associated Service instance via ServiceAvailableToELement.

Table of Contents
Hierarchy
Direct Known Subclasses
Class Qualifiers
Class Properties
Class Methods


Class Hierarchy

CIM_ManagedElement
   |
   +--CIM_Capabilities
   |
   +--CIM_SCSIMultipathConfigurationCapabilities

Direct Known Subclasses

Class Qualifiers

NameData TypeValue
DescriptionstringA class derived from CIM_Capabilities that models the capabilities of a multipath driver. Note that 'path' in this context refers to end-to-end device paths (for example, SCSI initiator/target) with no understanding of edge paths between interconnect elements such as switches. Load balancing only applies to symmetric multipath devices or to the ports in SCSITargetPortGroups in active access state. A driver may support different algorithms for load balancing. A few common algorithms are listed. Algorithms for specific device models and software vendor specific algorithms are also accommodated. An instance of this capabilities class MUST be instantiated whenever SCSIPathConfigurationService is instantiated and they MUST be assocaited one to one using ElementCapabilities. Multiple instances of the service/acapabilities pair MAY exist if multiple multipath drivers are installed. Each LogicalDevice subclass served by the underlying multipath driver is associated to the associated Service instance via ServiceAvailableToELement.
UMLPackagePathstringCIM::Device::StorageDevices
Versionstring2.29.0

Class Properties

Local Class Properties

NameData TypeDefault ValueQualifiers
NameData TypeValue
AutoFailbackEnabledboolean
DescriptionstringA Boolean indicating that autofailback is enabled to all logical units associated to the CIM_SCSIPathConfigurationService associated with this capabilities instance (unless overridden by CIM_SCSIMultipathSettings AutoFailbackEnabled.
MappingStringsstringMP_API.SNIA|MP_PLUGIN_PROPERTIES|autoFailbackEnabled
ModelCorrespondencestringCIM_SCSIMultipathConfigurationCapabilities.AutofailbackSupport, CIM_SCSIMultipathSettings.AutofailbackEnabled
AutofailbackSupportuint16
DescriptionstringSpecifies whether the implementation supports auto-failback (to re-enable paths that revert to a good state) at the plugin level, the multipath logical unit level, both levels or whether auto-failback is unsupported.
MappingStringsstringMP_API.SNIA|MP_PLUGIN_PROPERTIES|autofailbackSupport
ModelCorrespondencestringCIM_SCSIMultipathConfigurationCapabilities.AutofailbackEnabled, CIM_SCSIMultipathSettings.AutofailbackEnabled
ValueMapstring0, 2, 3, 4, 5
ValuesstringUnknown, No Autofailback support, Autofailback support service-wide, Autofailback support per logical unit, Autofailback support per service or logical unit
CanOverridePathsbooleanfalse
DescriptionstringThe capability of the driver to support the SetOverridePath and CancelOverridePaths methods. True if the implementation supports path overrides.
MappingStringsstringMP_API.SNIA|MP_PLUGIN_PROPERTIES|canOverridePaths
ModelCorrespondencestringCIM_SCSIPathConfigurationService.SetOverridePath
CanSetTPGAccessbooleanfalse
DescriptionstringThe capability of the driver to support the SetTPGAccess method. True if the implementation supports activating target port groups.
MappingStringsstringMP_API.SNIA|MP_PLUGIN_PROPERTIES|canSetTPGAccess
ModelCorrespondencestringCIM_SCSIPathConfigurationService.SetTPGAccess
CurrentPollingRateuint32
DescriptionstringThe current rate in seconds. Only valid when pollingRateMax is greater than 0 and canAutoFailback are true.
MappingStringsstringMP_API.SNIA|MP_PLUGIN_PROPERTIES|currentPollingRate
Writebooleantrue
DefaultLoadBalanceTypeuint16
DescriptionstringThe load balance types supported by the driver if not overridden by an administrative action.
MappingStringsstringMP_API.SNIA|MP_PLUGIN_PROPERTIES|defaultLoadBalanceType
ValueMapstring0, 1, 2, 3, 4, 5, 6
ValuesstringUnknown, Other, No Load Balancing, Round Robin, Least Blocks, Least IO, Product Specific
Writebooleantrue
DeviceNameFilespacestring
DescriptionstringA string representing the primary file names the driver uses for multipath logical units, if those filenames do not match the names in Logical Unit osDeviceName as documented in Appendix A of the SNIA MP API specification. The name is expressing in the following format: '*' represents one or more alphanumeric characters '#' represents a string of consecutive digits '%' represents a string of hexadecimal digits backslash is an escape character for literal presentation of *, #, or %. Any other character is interpreted literally. For example, '/dev/vx/dmp/*'. If the multipath driver creates multipath logical unit device file names in the same namespace as the OS then this property should be left null.
MappingStringsstringMP_API.SNIA|MP_PLUGIN_PROPERTIES|deviceNameFilespace
MaxLenuint32256
ExposesPathDeviceFilesboolean
DescriptionstringFalse if the MP drivers assure only a single device file name (e.g. /dev/dsk/...) exists for each MP device. True if the implementation exposes (or leaves exposed) device files for the individual paths encapsulated by the multipath device file. This is typically true for MP drivers that sit near the top of the driver stack and false for transport drivers at the bottom of the stack.
MappingStringsstringMP_API.SNIA|Plugin Properties|exposesPathDeviceFiles
MaximumWeightuint32
DescriptionstringDescribes the range of administer settable path weights supported by the driver. A driver with no path preference capabilities should set this property to zero. A driver with the ability to enable/disable paths should set this property to 1. Drivers with more weight settings can set the property appropriately.
MappingStringsstringMP_API.SNIA|MP_PLUGIN_PROPERTIES|maximumWeight
OnlySupportsSpecifiedProductsbooleanfalse
DescriptionstringTrue if the only supported device types are those described in aggregated CIM_Product instances as described in the description of SupportedLoadBalanceTypes.
MappingStringsstringMP_API.SNIA|MP_PLUGIN_PROPERTIES|deviceNameFilespace
ModelCorrespondencestringCIM_SCSIMultipathConfigurationCapabilities.SupportedLoadBalanceTypes
PollingRateMaxuint32
DescriptionstringThe maximum polling rate (in seconds) supported by the driver. A value of zero indicates the driver/plugin does not support polling. This maximum applies to both BadPathPollingRate and InactivePathPollingRate.
MappingStringsstringMP_API.SNIA|MP_PLUGIN_PROPERTIES|pollingRateMax
OtherSupportedLoadBalanceAlgorithmNamesstring[]
ArrayTypestringIndexed
DescriptionstringWhen the corresponding array entry in SupportedLoadBalanceTypes[] is 'Other', this entry provides a string describing the load balancing algorithm. When the corresponding array entry in SupportedLoadBalanceTypes[] is 'Product Specific', this entry provides a string specifying the SCSI vendor/product/revision and must be formatted as exactly 28 ASCII characters - 8 for vendor, 16 for product, and 4 for revision (see SCSI SPC Inquiry response)
MappingStringsstringSPC.INCITS-T10 |Standard Inquiry Response, MP_API.SNIA|MP_LOAD_BALANCE_TYPE, MP_API.SNIA|MP_DEVICE_PRODUCT_PROPERTIES
ModelCorrespondencestringCIM_SCSIMultipathConfigurationCapabilities.SupportedLoadBalanceTypes, CIM_SCSIMultipathConfigurationCapabilities.OtherSupportedLoadBalanceVendorNames
OtherSupportedLoadBalanceVendorNamesstring[]
ArrayTypestringIndexed
DescriptionstringWhen the corresponding array entry in SupportedLoadBalanceTypes[] is 'Other', this entry provides a string describing the vendor associated with the load balancing algorithm.
MappingStringsstringMP_API.SNIA|MP_LOAD_BALANCE_TYPE
ModelCorrespondencestringCIM_SCSIMultipathConfigurationCapabilities.SupportedLoadBalanceTypes, CIM_SCSIMultipathConfigurationCapabilities.OtherSupportedLoadBalanceAlgorithmNames
SupportedLoadBalanceTypesuint16[]
ArrayTypestringIndexed
DescriptionstringThe load balance types supported by the driver for all logical units on a target device. If 'Product Specified' is included, one or more instances of CIM_Product must be aggregated to the capabilities instance via ConcreteComponent. Each Product instance provides the SCSI Vendor, Product, and Revision ID of a supported product.
MappingStringsstringMP_API.SNIA|MP_LOAD_BALANCE_TYPE
ModelCorrespondencestringCIM_SCSIMultipathConfigurationCapabilities.OtherSupportedLoadBalanceAlgorithmNames, CIM_SCSIMultipathConfigurationCapabilities.OtherSupportedLoadBalanceVendorNames
ValueMapstring0, 1, 2, 3, 4, 5, 6, 7
ValuesstringUnknown, Other, No Load Balancing, Round Robin, Least Blocks, Least IO, LBA Region, Product Specific

Inherited Properties

NameData TypeClass Origin
CaptionstringCIM_ManagedElement
DescriptionstringCIM_ManagedElement
ElementNamestringCIM_Capabilities
Generationuint64CIM_ManagedElement
InstanceIDstringCIM_Capabilities

Class Methods

Inherited Class Methods

NameReturn TypeClass Origin
CreateGoalSettingsuint16CIM_Capabilities