HP Hitachi Dynamic Link Manager Software - Manual (Page 106)

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