HP Serviceguard Extension for RAC (SGeRAC) manual Listener

The file /var/opt/oracle/oravg.conf must not be present so Oracle Cluster Software will not activate or deactivate any shared storage.

Multipathing

Multipathing is automatically configured in HP-UX 11i v3 (this is often called native multipathing). Multipathing 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. For information on Multipathing and HP-UX 11i v3, see “About Multipathing” (page 33).

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.

Mirroring and Resilvering

On node and cluster wide failures, when SLVM mirroring is used and Oracle resilvering is available, the recommendation for the logical volume mirror recovery policy is set to either full mirror resynchronization (NOMWC) or fast resynchronization (MWC) for control and redo files and no mirror resynchronization (NONE) for the datafiles since Oracle would perform resilvering on the datafiles based on the redo log.

NOTE: If Oracle resilvering is not available, the mirror recovery policy should be set to either full mirror resynchronization (NOMWC) or fast resynchronization (MWC) of all control, redo, and datafiles.

Contact Oracle to determine if your version of Oracle RAC allows “resilvering” and to appropriately configure the mirror consistency recovery policy for your logical volumes.

For more information on using NOMWC and MWC, refer to the HP-UX System Administrator's Guide: Logical Volume Management HP-UX 11i Version 3 at www.hp.com/go/hpux-core-docs —> HP-UX 11i V3.

Shared Storage Activation

Depending on your version of Oracle Cluster Software, the default configuration for activation of the shared storage for Oracle Cluster Software may be controlled by the /var/opt/oracle/ oravg.conf file. For the default configuration where the shared storage is activated by SGeRAC before starting Oracle Cluster Software or RAC instance, the oravg.conf file should not be present.

Listener

Automated Startup and Shutdown

CRS can be configured to automatically start, monitor, restart, and halt listeners.

If CRS is not configured to start the listener automatically at Oracle Cluster Software startup, the listener startup can be automated with supported commands, such as srvctl and lsnrctl, through scripts or SGeRAC packages. If the SGeRAC package is configured to start the listener, the SGeRAC package would contain the virtual IP address required by the listener.

Interface Areas 27