Using Serviceguard Extension for RAC, 7th Edition, September 2008

• Cluster Lock device/Quorum Server/Lock Lun must be configured in the cluster.

• CLUSTER_INTERCONNECT_SUBNET can be used to monitor only IPv4 subnets.

• To change default Serviceguard cluster configuration parameter NODE_TIMEOUT,

HEARTBEAT_INTERVAL or Oracle Clusterware configuration parameter CSS misscount, set

Oracle misscount to the higher of:

— 195 seconds

— 40*SG_NODE_TIMEOUT + 25 * SG_HB_INTERVAL + 120 seconds

Creating a Storage Infrastructure with LVM

In addition to configuring the cluster, you create the appropriate logical volume infrastructure

to provide access to data from different nodes. This is done with Logical Volume Manager (LVM),

Veritas Cluster Volume Manager (CVM), or Veritas Volume Manager (VxVM). LVM and VxVM

configuration are done before cluster configuration, and CVM configuration is done after cluster

configuration.

This section describes how to create LVM volume groups for use with Oracle data. Before

configuring the cluster, you create the appropriate logical volume infrastructure to provide access

to data from different nodes. This is done with Logical Volume Manager. Separate procedures

are given for the following:

• Building Volume Groups for RAC on Mirrored Disks

• Building Mirrored Logical Volumes for RAC with LVM Commands

• Creating RAC Volume Groups on Disk Arrays

• Creating Logical Volumes for RAC on Disk Arrays

The Event Monitoring Service HA Disk Monitor provides the capability to monitor the health

of LVM disks. If you intend to use this monitor for your mirrored disks, you should configure

them in physical volume groups. For more information, refer to the manual Using HA Monitors.

NOTE: When using LVM version 2.x, the volume groups are supported with Serviceguard.

The steps shown in the following section are for configuring the volume groups in Serviceguard

clusters LVM version 1.0.

For more information on using and configuring LVM version 2.x, see the HP-UX 11i Version 3:

HP-UX System Administrator's Guide: Logical Volume Management located at:

http://docs.hp.com -> Core HP-UX 11iv3 -> LVM Volume Manager

For LVM version 2.x compatibility requirements see the Serviceguard/SGeRAC/SMS/Serviceguard

Mgr Plug-in Compatibility and Feature Matrix at http://docs.hp.com -> High Availability ->

Serviceguard -> Support Matrixes

NOTE: For more information, see the Serviceguard Version A.11.18 Release Notes at

http://docs.hp.com -> High Availability -> Serviceguard

Building Volume Groups for RAC on Mirrored Disks

The procedure described in this section uses physical volume groups for mirroring of individual

disks to ensure that each logical volume is mirrored to a disk on a different I/O bus. This kind

of arrangement is known as PVG-strict mirroring. It is assumed that your disk hardware is

already configured so that the disk can be used as a mirror copy, which is connected to each

node on a different bus other than the bus that is used for the other (primary) copy.

Creating a Storage Infrastructure with LVM 43