HP Hitachi Dynamic Link Manager Software Licenses - Manual (Page 88)

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It is necessary only when using Oracle RAC 10g 10.1.0.4.0.
Note
• When a host and an Oracle RAC 10g 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 10g, 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 10g voting disk, change the following settings according to
your version of Oracle RAC 10g:
¢
When using Oracle RAC 10g version 10.1.0.3.0 or later:
Change the value of MISSCOUNT according to the storage system type.
Specify a value that is equal to or greater than the value calculated by
using the formulas in the following table:
Table 3-11 Formula for Calculating MISSCOUNT
Storage system type
Formula for obtaining the value of
MISSCOUNT
• Lightning 9900V series
• Hitachi USP series
• Universal Storage
Platform V/VM series
• Virtual Storage Platform
series
• VSP G1000 series
• HUS VM
number-of-paths-connected-to-the-voting-disk
x 60 seconds
• Hitachi
AMS2000/AMS/WMS/SMS
series
• HUS100 series
• Thunder 9500V series
number-of-paths-connected-to-the-voting-disk
x 30 seconds
¢
When using Oracle RAC 10g version 10.2.0.2.0 or later:
Change the value of MISSCOUNT according to the storage system type.
Specify a value that is equal to or greater than the value calculated by
using the formulas in the table below.
When you are using Sun Cluster or Storage Foundation for Oracle
RAC, specify a value equal to or greater than either of the values
indicated below:
• Calculated value of MISSCOUNT
3-22
Creating an HDLM Environment
Hitachi Dynamic Link Manager (for Solaris) User Guide