Data Object - HostCapability

Property of
HostSystem
Returned by
QueryTargetCapabilities
Extends
DynamicData
See also
HostCpuIdInfo

Data Object Description

Specifies the capabilities of the particular host. This set of capabilities is referenced in other parts of the API specification to indicate under what circumstances an API will throw a NotSupported fault.

Properties

Name Type Description
backgroundSnapshotsSupportedxsd:boolean

Flag indicating whether background snapshots are supported on this host.

Since VI API 2.5
cloneFromSnapshotSupportedxsd:boolean

Indicates whether or not cloning a virtual machine from a snapshot point is allowed.

This property must be true on the host where the virtual machine is currently residing. This property need not be true on the destination host for the clone.
See snapshot

Since vSphere API 4.0
cpuMemoryResourceConfigurationSupportedxsd:boolean

Flag indicating whether cpu and memory resource configuration is supported. If this is set to false, UpdateConfig, UpdateChildResourceConfiguration cannot be used for changing the cpu/memory resource configurations.

Since VI API 2.5
datastorePrincipalSupportedxsd:boolean

Flag indicating whether datastore principal user is supported on the host.
deltaDiskBackingsSupportedxsd:boolean

Flag indicating whether explicitly creating arbirary configurations of delta disk backings is supported.

A delta disk backing is a way to preserve a virtual disk backing at some point in time. A delta disk backing is a file backing which in turn points to the original virtual disk backing (the parent). After a delta disk backing is added, all writes go to the delta disk backing. All reads first try the delta disk backing and then try the parent backing if needed.

If this property is false, then delta disk backings can only be implicitly created through using snapshot operations and two virtual machines cannot safely share a parent disk backing.

If this property is true, then delta disk backings can be explicitly created and managed, and two virtual machines may safely share a parent disk backing.

In the context above, "safely" means that performing operations on one of the virtual machines will not affect the operation of the other virtual machine.


See parent
See parent
See parent
See parent
See parent
See PromoteDisks_Task
See diskMoveType
See diskMoveType

Since vSphere API 4.0
ftCompatibilityIssues*xsd:string[]

For a host which doesn't support Fault Tolerance, indicates all the reasons for the incompatibility. HostCapabilityFtUnsupportedReason lists the set of possible values.

Since vSphere API 4.1
ftSupportedxsd:boolean

Indicates whether this host supports Fault Tolerance There can be many reasons why a host does not support Fault Tolerance, which includes CPU compatibility, product compatibility as well as other host configuration settings. For specific reasons, look into replayCompatibilityIssues and ftCompatibilityIssues

Since vSphere API 4.0
highGuestMemSupportedxsd:boolean

Is high guest memory supported.
ipmiSupported*xsd:boolean

Flag indicating whether the host supports IPMI (Intelligent Platform Management Interface). XXX - Make ipmiSupported optional until there is a compatible hostagent.

Since vSphere API 4.0
iscsiSupportedxsd:boolean

Is access to iSCSI devices supported.
localSwapDatastoreSupportedxsd:boolean

Flag indicating whether the host supports selecting a datastore that that may be used to store virtual machine swapfiles.

Since VI API 2.5
loginBySSLThumbprintSupported*xsd:boolean

Flag indicating whether this host supports SSL thumbprint authentication

Since vSphere API 4.0
maintenanceModeSupportedxsd:boolean

Is maintenance mode supported
maxRunningVMs*xsd:int

The maximum number of virtual machines that can be running simultaneously on this host. If this capability is not set, the number of virtual machines running simultaneously is unlimited.
maxSupportedVcpus*xsd:int

The maximum number of virtual CPUs supported per virtual machine. If this capability is not set, the number is unlimited.
maxSupportedVMs*xsd:int

The maximum number of virtual machines that can exist on this host. If this capability is not set, the number of virtual machines is unlimited.
nfsSupportedxsd:boolean

Is access to NFS devices supported.
nicTeamingSupportedxsd:boolean

Is NIC teaming supported.
perVMNetworkTrafficShapingSupportedxsd:boolean

Indicates whether network traffic shaping on a per virtual machine basis is supported.

Since vSphere API 4.0
perVmSwapFilesxsd:boolean

Flag indicating whether virtual machine execution on this host involves a swapfile for each virtual machine. If true, the swapfile placement for a powered-on virtual machine is advertised in its FileLayout by the swapFile property.

Since VI API 2.5
preAssignedPCIUnitNumbersSupportedxsd:boolean

Flag to indicate whether the server returns unit numbers in a pre-assigned range for devices on the PCI bus. When the server supports this flag, the device unit number namespace is partitioned by device type. Different types of devices will sit in a specific range of unit numbers that may not correspond to physical slots in the pci bus but present a relative ordering of the devices with respect to other devices of the same type. Note that this does not mean that the user can set the relative ordering between device types, but only allows stable orderings between devices of the same type. The unit number will now clearly represent an ordering between devices of the same type. unitNumber This property is only available for devices on the pci controller.

Since VI API 2.5
rebootSupportedxsd:boolean

Flag indicating whether rebooting the host is supported.
recordReplaySupportedxsd:boolean

Indicates whether this host supports record and replay

Since vSphere API 4.0
recursiveResourcePoolsSupportedxsd:boolean


replayCompatibilityIssues*xsd:string[]

For a host which doesn't support replay, indicates all the reasons for the incompatibility. HostReplayUnsupportedReason lists the set of possible values.

Since vSphere API 4.1
replayUnsupportedReason*xsd:stringDeprecated. As of vSphere API 4.1, use replayCompatibilityIssues.

For a host whose CPU doesn't support replay, indicates the reason for the incompatibility. HostReplayUnsupportedReason represents the set of possible values.

Since vSphere API 4.0
restrictedSnapshotRelocateSupportedxsd:boolean

Indicates whether this host supports relocation of virtual machines with snapshots. Must be true on the source and destination hosts for the relocation to work. Even if this is true, the following conditions must hold: 1) All the the vm's files are in one directory prior to the relocate. 2) All of the vm's files will be in one directory after the relocate. 3) The source and destination hosts are the same product version.

Since VI API 2.5
sanSupportedxsd:boolean

Flag indicating whether access to SAN devices is supported.
scaledScreenshotSupportedxsd:boolean

Indicates whether scaling is supported for screenshots retrieved over https. If true, screenshot retrieval supports the additional optional parameters 'width' and 'height'. After cropping, the returned image will be scaled to these dimensions. If only one of these parameters is specified, default behavior is to return an image roughly proportional to the source image.

Since VI API 2.5
screenshotSupportedxsd:boolean

Indicates whether the screenshot retrival over https is supported for this host's virtual machines. If true, a screenshot can be retrieved at the HTTPS relative path /screen?id=<managed object ID of virtual machine or snapshot>. If any of the optional parameters 'top', 'left', 'bottom', and 'right' is specified, the returned image will be cropped from the rectangle with upper left corner (left, top) and bottom right corner (right - 1, bottom - 1). These values default to the top, left, bottom and right edges of the image. The client must use an authenticated session with privilege VirtualMachine.Interact.ConsoleInteract on the requested virtual machine or, in the case of a snapshot, the virtual machine associated with that snapshot.

Since VI API 2.5
shutdownSupportedxsd:boolean

Flag indicating whether the host can be powered off
standbySupportedxsd:boolean

Flag indicating whether you can put the host in a power down state, from which it can be powered up automatically.

Since VI API 2.5
storageIORMSupportedxsd:boolean

Indicates whether the host supports storage I/O resource management.

Since vSphere API 4.1
storageVMotionSupportedxsd:boolean

Indicates whether the storage of a powered-on virtual machine may be relocated.

Since vSphere API 4.0
supportedCpuFeature*HostCpuIdInfo[]

CPU feature set that is supported by the virtualization platform. This feature set may reflect characteristics of the product capabilities and licensing. For any feature marked '-', reference the cpuFeature array of the host's HardwareInfo to determine the correct value.

Since vSphere API 4.0
suspendedRelocateSupportedxsd:boolean

Indicates whether this host supports relocation of suspended virtual machines. Must be true on the source and destination hosts for the relocation to work.
tpmSupportedxsd:boolean

Flag indicating whether this host supports the integrity measurement using a TPM device.

Since vSphere API 4.0
unsharedSwapVMotionSupportedxsd:boolean

Flag indicating whether the host supports participating in a VMotion where the virtual machine swapfile is not visible to the destination.

Since VI API 2.5
virtualExecUsageSupportedxsd:boolean

Indicates whether the host supports configuring hardware virtualization (HV) support for virtual machines.

Since vSphere API 4.0
vlanTaggingSupportedxsd:boolean

Is VLAN Tagging supported.
vmDirectPathGen2Supportedxsd:boolean

Indicates whether the host supports network passthrough using VMDirectPath Gen 2. Note that this is a general capability for the host and is independent of support by a given physical NIC. If false, the reason(s) for lack of support will be provided in vmDirectPathGen2UnsupportedReason and/or in vmDirectPathGen2UnsupportedReasonExtended.
See vmDirectPathGen2Supported

Since vSphere API 4.1
vmDirectPathGen2UnsupportedReason*xsd:string[]

If vmDirectPathGen2Supported is false, this array will be populated with reasons for the lack of support (chosen from VmDirectPathGen2UnsupportedReason). If there is a reason for the lack of support that cannot be described by the available constants, vmDirectPathGen2UnsupportedReasonExtended will be populated with an additional explanation provided by the platform.

Note that this list of reasons is not guaranteed to be exhaustive.

If the reason "hostNptIncompatibleProduct" is provided, then that will be the only provided reason, as the host software is incapable of providing additional information.

Since vSphere API 4.1
vmDirectPathGen2UnsupportedReasonExtended*xsd:string

If vmDirectPathGen2Supported is false, this property may contain an explanation provided by the platform, beyond the reasons (if any) enumerated in vmDirectPathGen2UnsupportedReason.

Since vSphere API 4.1
vmotionSupportedxsd:boolean

Flag indicating whether you can perform VMotion.
vmotionWithStorageVMotionSupportedxsd:boolean

Indicates whether the storage of a powered-on virtual machine may be relocated while simultaneously changing the execution host of the virtual machine.

Since vSphere API 4.0
vStorageCapablexsd:boolean

Indicates whether the host supports vStorage Hardware acceleration.

Since vSphere API 4.1
Properties inherited from DynamicData
dynamicProperty, dynamicType
*Need not be set
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