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HP Hitachi Dynamic Link Manager Software User Manual

Page 106

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3. Creating an HDLM Environment

84

#

You must apply MP3 or later.

Note

„

When a host and an Oracle RAC 11g voting disk are connected by multiple paths,

HDLM performs failover processing for those paths (in the same way as for

normal paths) when an I/O timeout occurs for one of the paths.
Note that, depending on the settings of Oracle RAC 11g, Oracle RAC 10g might

determine that a node error has occurred before the failover processing performed

by HDLM is completed, and then re-configure the cluster.
Therefore, when HDLM manages the paths that are connected to an Oracle RAC

11g voting disk, change settings as described below.

When Sun Cluster is not used:

Change the value of

MISSCOUNT

to the following value or greater:

(number-of-paths-connected-to-the-voting-disk

x

60 seconds).

If four or more paths are connected to a voting disk, change

DISKTIMEOUT

,

which is the I/O timeout threshold value for a voting disk, to the following

value or greater: (number-of-paths-connected-to-the-voting-disk

x

60

seconds).

When Sun Cluster is used:

Change the value of

MISSCOUNT

to match the type of storage system. To do

so, use the following table to obtain the value to be specified, and then

change the current value to a value equal to or greater than the value you have

obtained.

Volume Manager

VxVM 5.0 cluster functionality

#

Allocates memory areas, shared

among nodes, such as Oracle

database files, SPFILE, REDO log
files, Oracle Cluster Registry, and

voting disks, to the VxVM 5.0

cluster functionality volumes. For
details on how to allocate memory

areas, refer to the documentation for

Oracle RAC 11g.

Configurati

on

Program

Remarks