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[Beginning with Windows 8 and Windows Server 2012, the Virtual Disk Service COM interface is superseded by the Windows Storage Management API.]

Defines a set of valid load balance policies for a path. These policies correspond to the definitions in the DSM MOF.

Syntax

typedef enum _VDS_LOADBALANCE_POLICY_ENUM {
  VDS_LBP_UNKNOWN = 0,
  VDS_LBP_FAILOVER = 1,
  VDS_LBP_ROUND_ROBIN = 2,
  VDS_LBP_ROUND_ROBIN_WITH_SUBSET = 3,
  VDS_LBP_DYN_LEAST_QUEUE_DEPTH = 4,
  VDS_LBP_WEIGHTED_PATHS = 5,
  VDS_LBP_LEAST_BLOCKS = 6,
  VDS_LBP_VENDOR_SPECIFIC = 7
} VDS_LOADBALANCE_POLICY_ENUM;

Constants

 
VDS_LBP_UNKNOWN
Value: 0
The policy is unknown.
VDS_LBP_FAILOVER
Value: 1
The policy uses one primary path with other paths being backup paths.
VDS_LBP_ROUND_ROBIN
Value: 2
The policy uses all paths in round-robin fashion.
VDS_LBP_ROUND_ROBIN_WITH_SUBSET
Value: 3
The policy uses primary paths in round-robin fashion. The backup paths are used if all of the primary paths
fail.
VDS_LBP_DYN_LEAST_QUEUE_DEPTH
Value: 4
The policy uses the path with the least number of active requests.
VDS_LBP_WEIGHTED_PATHS
Value: 5
The policy uses the path with the least weight (each path is assigned a weight).
VDS_LBP_LEAST_BLOCKS
Value: 6
The policy uses the path with the least blocks.
VDS_LBP_VENDOR_SPECIFIC
Value: 7
The policy is a vendor-specific policy.

Remarks

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