NEC Storage Software PathManager Manuel d'utilisateur télécharger pdf (Page 53)

Chapter 4 Operating NEC Storage PathManager

take up to a minute longer for NEC Storage PathManager to recognize path failures due to execution of

failover. To avoid such situations, it is recommended that paths having priorities in numerical sequence do

not have common resources.

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NEC Storage

StoragePathSavior

Priority: 4 3 2 1

Storage PathManager

Figure 4-1 Setting priority (1)

In the next figure, path priorities are set to 4, 2, 3, and 1 from left to right. In this case, only one execution of

failover is necessary to determine which path is going to be used next in the case of failures in a FC switch or

failures in the NEC Storage controller.

This setting is effective when conducting dynamic load balancing. Since paths having priorities that are in

numerical sequence do not share any resources, performance decrement due to resource problems is not likely

to occur.

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NEC Storage Software PathManager Manuel d'utilisateur Page 53