Support of Oracle RAC ASM with SGeRAC, January 2008

HP Availability Clusters Solutions Lab 1/25/2008 Page 6
Oracle Clusterware maintains a resource dependency on the ASM instance running on a node from
every RAC database instance on that node that uses ASM services; this ensures that the RAC
database instances using the services of a failed ASM instance will be halted. The other ASM
instances in the cluster are responsible to address the issue of operations only partially completed by
the failed ASM instance and to preserve the integrity of the ASM disk group metadata.
SG/SGeRAC Support for ASM on HP-UX 11i v2
Overview
Support for ASM with SG/SGeRAC commences with SGeRAC A.11.17.
However, please note that it has been possible to set up Oracle databases using ASM on HP-UX from
the time Oracle 10g became available on HP-UX, using the following configurations that do not
require SG/SGeRAC:
• non-clustered single instance Oracle
• Oracle single instance and RAC databases running in a pure Oracle clusterware
environment
The following requirements/restrictions apply to SG/SGeRAC (A.11.17 or later) support of ASM (and
are summarized in Table 1):
Table 1. ASM support with SG/SGeRAC A.11.17 or later
SUPPORTED NOT SUPPORTED
Oracle RAC database Oracle single instance database, with
or without Oracle clusterware
SLVM Logical Volumes as ASM Disk
Group Members
Raw disks/LUs or CVM Logical
Volumes as ASM Disk Group Members
ASM configurations on SGeRAC
using SGeRAC A.11.17 or later, and
Oracle 10g R2 RAC
ASM configurations on SGeRAC using
SGeRAC 11.16, Oracle 10g R1 RAC
or HP-UX 11i v1
ASM configurations on SGeRAC
using SGeRAC A.11.17 or later, and
Oracle 11g R1
Single instance Oracle database with
ASM managed storage running in
Serviceguard cluster.
Maximum SGeRAC cluster size for
ASM configurations is 16
Single instance Oracle database with
ASM-managed storage in SGeRAC
configuration wherein SGeRAC
provides node membership to Oracle
Clusterware.
SGeRAC Toolkit
3
framework based
on Multi-Node Package (MNP)
/Simple Package Dependency to
manage ASM configurations on
SGeRAC up to a maximum cluster
3
See the whitepaper “Use of Serviceguard Extension for RAC Toolkit” at http://www.docs.hp.com