Using Serviceguard Extension for RAC, 6th Edition, April 2008

/dev/dsk/c3t15d0 would indicate SCSI controller instance 3, SCSI target 15, and
SCSI LUN 0. HP-UX 11i v3 introduces a new nomenclature for device files, known as
agile addressing (sometimes also called persistent LUN binding). Under the agile
addressing convention, the hardware path name is no longer encoded in a storage
device’s name; instead, each device file name reflects a unique instance number, for
example /dev/[r]disk/disk3, that does not need to change when the hardware
path does. Agile addressing is the default on new 11i v3 installations, but the I/O
subsystem still recognizes the pre-11i v3 nomenclature. This means that you are not
required to migrate to agile addressing when you upgrade to 11i v3, though you should
seriously consider its advantages. It is possible, though not a best practice, to have
legacy DSFs on some nodes and agile addressing on others; this allows you to migrate
the names on different nodes at different times, if necessary.
Support for the SGeRAC Toolkit
The SGeRAC Toolkit provides documentation and scripts to simplify the integration
of SGeRAC and the Oracle 10g RAC stack. It also manages the dependency between
Oracle Clusterware and Oracle RAC instances with a full range of storage management
options supported in the Serviceguard/SGeRAC environment.The framework provided
by the SGeRAC toolkit is unique in the high level of multi-vendor (Oracle, Symantec,
HP) and multi-storage platform (CFS, CVM, SLVM, ASM over SLVM) integration it
offers (on HP-UX releases that support Veritas CFS and CVM; see “About Veritas CFS
and CVM from Symantec” (page 25)).
The SGeRAC Toolkit uses Serviceguard/SGeRAC version A.11.17 (or later) multi-node
packages and package dependency features to provide a uniform, intuitive, and
easy-to-manage method to co-ordinate between SGeRAC and Oracle Clusterware.
Additionally, the SGeRAC Toolkit helps to manage all the storage options supported
by SGeRAC; CFS, SLVM, CVM, ASM (over SLVM), and SGeRAC support ASM over
the raw device files on HP-UX 11i v3 only. For more information, refer to the Serviceguard
Extension for RAC Version A.11.18 Release Notes located at http://docs.hp.com ->
High Availability -> Serviceguard Extension for Real Application Clusters -> Release
Notes.
Configuration File Parameters
You need to code specific entries for all the storage groups that you want to use in an
Oracle RAC configuration. If you are using LVM, the OPS_VOLUME_GROUP parameter
is included in the cluster ASCII file. If you are using Veritas CVM, the STORAGE_GROUP
parameter is included in the package ASCII file. Details are as follows:
OPS_VOLUME_GROUP
The name of an LVM volume group whose disks are attached
to at least two nodes in the cluster; the disks will be accessed
by more than one node at a time using SLVM with
46 Serviceguard Configuration for Oracle 10g RAC