Hp EVA Array iSCSI Connectivity Option Manual do Utilizador descarregar pdf (Página 106)

Figure 5

5 iSCSI Initiator properties

Load balancing features of Microsoft MPIO for iSCSI

The features of MS MPIO for iS CSI include:

• Failover Only—No load balancing is performed. There is a single active path and the rest of the

paths are standby paths. The active path is used for sending all I/O. If the active path fails, then

one of the standby paths is used. When the formally active path is reconnected, it becomes active

and the activated standb y path r eturns to standby.

• Round Robin—All paths are active paths; they are used for sending I/O in a round robin fashion.

• Round Robin with a subset of paths—A set of paths is conﬁguredasactiveandasetofpathsis

conﬁgured as standby. I/O is sent in a round robin fashion over the active paths. If all of the

active paths fail, one of the standby paths is used. If any of the formerly active paths become

available again, then the formerly active paths are used. The activated standby path becomes a

standby path a gain.

• 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, then the path with the next lowest weight is used.

• Least Queue Depth—ThisisnotsupportedbyMPIO.

NOTE:

Failover policies are set on a LUN-by-LUN basis. MPIO support does not have global initiator for

failover settings.

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Setting up the iSCSI Initiator for multipathing

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