User's Manual

Chapter 3 Functions of NEC Storage PathManager
for dynamic load balancing must be set for each unit.
Second argument 0: do not execute dynamic load balancing (specified when load balancing will not be
executed or when static load balancing will be executed)
Second argument 1: execute dynamic load balancing (in the round robin method)
Note also that the settings for dynamic load balancing cannot be made if the program is working
with MSCS.
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The cluster liaison function enables the use of NEC Storage PathManager in a cluster environment. When
abnormalities occur in I/O, NEC Storage PathManager first attempts to switch paths. If this does not work,
then the cluster control program will switch nodes. NEC Storage PathManager can be used in
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XPRESSCLUSTER (CLUSTERPRO) and MSCS (Microsoft cluster system) environments.
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This function allows NEC Storage PathManager to work in liaison with EXPRESSCLUSTER
(CLUSTERPRO). No particular settings are necessary to use this function.
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This function allows NEC Storage PathManager to be used in an MSCS environment. Use the
-setmscsmode option of the spscmd to enable the MSCS liaison function. This function is disabled by
default. Use the -getmscsmode option to check the current settings.
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