HP XP20000/XP24000 HP StorageWorks MPX200 Multifunction Router User Guide (569 - Page 97
Microsoft MPIO for iSCSI load-balancing policies, Load Balance Policy, Failover Only, Round-robin
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7. Select the desired options on the Load Balance Policy menu. Figure 68 iSCSI Initiator MPIO properties . Microsoft MPIO for iSCSI load-balancing policies The Microsoft MPIO for iSCSI load-balancing policies are as follows: • Failover Only. No load balancing is performed. There is a single active path; the remaining paths are standby paths. The active path sends all I/O. If the active path fails, a standby path is used. When the formerly active path is reconnected, it becomes active and the activated standby path returns to standby. • Round-robin. All paths are active paths and are used to send I/O in a round-robin fashion. • Round-robin with a subset of paths. One set of paths is configured as active and another set of paths is configured as standby. I/O is sent in a round-robin fashion over the active paths. If all active paths fail, a standby path is used. When a formerly active path is reconnected, it becomes active and the activated standby path returns to standby. • Weighted Path. Each path is assigned a weight and I/O is sent on the path with the lowest weight. If the path with the lowest weight fails, the path with the next lowest weight is used. • Least Queue Depth. This is not supported by MPIO. NOTE: For raw disk access, the MPIO load-balancing policy must be Failover Only. For file system disk access, all MPIO load-balancing policies are supported. Failover policies are set on a LUN-by-LUN basis. MPIO does not support global failover settings. MPX200 Multifunction Router User Guide 97
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