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VDS_PROVIDER_LBSUPPORT_FLAG enumeration (vdshwprv.h)

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[Beginning with Windows 8 and Windows Server 2012, the Virtual Disk Service COM interface is superseded by the Windows Storage Management API.]

Specifies the set of valid flags for indicating which load balance policies a hardware provider supports.

Syntax

typedef enum _VDS_PROVIDER_LBSUPPORT_FLAG {
  VDS_LBF_FAILOVER = 0x1,
  VDS_LBF_ROUND_ROBIN = 0x2,
  VDS_LBF_ROUND_ROBIN_WITH_SUBSET = 0x4,
  VDS_LBF_DYN_LEAST_QUEUE_DEPTH = 0x8,
  VDS_LBF_WEIGHTED_PATHS = 0x10,
  VDS_LBF_LEAST_BLOCKS = 0x20,
  VDS_LBF_VENDOR_SPECIFIC = 0x40
} VDS_PROVIDER_LBSUPPORT_FLAG;

Constants

 
VDS_LBF_FAILOVER
Value: 0x1
The provider supports using one primary path with the other paths being backup paths.
VDS_LBF_ROUND_ROBIN
Value: 0x2
The provider supports using all paths in round robin fashion.
VDS_LBF_ROUND_ROBIN_WITH_SUBSET
Value: 0x4
The provider supports using primary paths in round robin fashion. The backup paths are used if all of the
primary paths fail.
VDS_LBF_DYN_LEAST_QUEUE_DEPTH
Value: 0x8
The provider supports using the path with the least number of active requests.
VDS_LBF_WEIGHTED_PATHS
Value: 0x10
The provider supports using the path with the least weight (each path is assigned a weight).
VDS_LBF_LEAST_BLOCKS
Value: 0x20
The provider supports using the path with the least blocks.
VDS_LBF_VENDOR_SPECIFIC
Value: 0x40
The provider supports a vendor-specific policy.

Remarks

Note  Additional constants might be added to the VDS_PROVIDER_LBSUPPORT_FLAG enumeration in future Windows versions. For this reason, your application must be designed to gracefully handle an unrecognized VDS_PROVIDER_LBSUPPORT_FLAG enumeration constant.
 

Requirements

Requirement Value
Minimum supported client Windows Vista [desktop apps only]
Minimum supported server Windows Server 2003 R2 [desktop apps only]
Header vdshwprv.h

See also

VDS Enumerations