Using Serviceguard Extension for RAC, 3rd Edition, May 2006

Serviceguard Configuration for Oracle 10g RAC
Interface Areas
Chapter 236
Automated Oracle Cluster Software Startup and Shutdown
The preferred mechanism that allows Serviceguard to notify Oracle
Cluster Software to start and to request Oracle Cluster Software to
shutdown is the use of Serviceguard packages.
Monitoring
Oracle Cluster Software daemon monitoring is performed through
programs initiated by the HP-UX init process. SGeRAC monitors Oracle
Cluster Software to the extent that CSS is a NMAPI2 group membership
client and group member. SGeRAC provides group membership
notification to the remaining group members when CSS enters and
leaves the group membership.
Shared Storage
SGeRAC supports shared storage using HP Shared Logical Volume
Manager (SLVM), Veritas Cluster File System (CFS) and Veritas Cluster
Volume Manager (CVM). The file /var/opt/oracle/oravg.conf must
not be present so Oracle Cluster Software will not activate or deactivate
any shared storage.
Multipath
Multipath is supported through either SLVM pvlinks or CVM Dynamic
Multipath (DMP). In some configurations, SLVM or CVM does not need
to be configured for multipath as the multipath is provided by the
storage array. Since Oracle Cluster Software checks availability of the
shared device for the vote disk through periodic monitoring, the
multipath detection and failover time must be less than CRS's timeout
specified by the Cluster Synchronization Service (CSS) MISSCOUNT. On
SGeRAC configurations, the CSS MISSCOUNT value is set to 600 seconds.
Multipath failover time is typically between 30 to 120 seconds.
OCR and Vote Device
Shared storage for the OCR and Vote device should be on supported
shared storage volume managers with multipath configured and with
either the correct multipath failover time or CSS timeout.