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14 cluster support – HP Hitachi Dynamic Link Manager Software User Manual

Page 75

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2. HDLM Functions

53

2.14 Cluster Support

HDLM can also be used in cluster configurations.
For details on cluster software supported by HDLM, the supported Solaris version, and

usable volume management software, see 3.1.5 Combinations of Cluster Software

and Volume Managers Supported by HDLM.
HDLM uses a path of the active host to access an LU.
Paths are switched in units of physical paths. Therefore, if an error occurs in a path, all

the other paths that run through the same physical path are switched. The switching
destination is a physical path of the active host. The details of host switching depend

on the application.
Note

When you use HDLM in a cluster configuration, you must install the same version

of HDLM on all the nodes that comprise the cluster. If different versions of

HDLM are installed, the cluster system might not operate correctly. If the

HDLM

Version

and

Service

Pack

Version

, which are displayed by executing the

following command, are the same, the versions of HDLM are the same:

# /opt/DynamicLinkManager/bin/dlnkmgr view -sys