Serviceguard Extension for RAC Version A.11.17 Release Notes, February 2007

Serviceguard Extension for RAC Version A.11.17 Release Notes
What’s in this Version
Chapter 1 13
Multipathing, Veritas DMP and Related Features
The HP-UX 11i v3 I/O subsystem provides multipathing and load
balancing by default. This is often referred to as native multipathing. 4.1
and earlier versions of Veritas Volume Manager (VxVM) and Dynamic
Multipathing (DMP) from Symantec are supported on HP-UX 11i v3, but
do not provide multipathing and load balancing; DMP acts as a
pass-through driver, allowing multipathing and load balancing to be
controlled by the HP-UX I/O subsystem instead. When you upgrade to a
system to HP-UX 11i v3, the I/O subsystem will start performing load
balancing and multipathing for all multipath devices (whether or not
they are managed by VxVM/DMP); you do not have to take any
additional steps to make this happen.
For more information about multipathing in HP-UX 11i v3, see the white
paper HP-UX 11i v3 Native Multipathing for Mass Storage, and the
Logical Volume Management volume of the HP-UX System
Administrator’s Guide in the HP-UX 11i v3 Operating Environments
collection on http://docs.hp.com.
Additional Features and Restrictions
The following features and restrictions apply to the release of SGeRAC
version A.11.17 on HP-UX 11i v2 and A.11.17.01 on HP-UX 11i v3:
• Support for the SGeRAC Toolkit
• Support for 8192 Oracle Server Processes for Oracle 9i RAC.
• Serviceguard Extension for RAC does not support Mixed Clusters.
• Support Oracle 9.2 RAC and 10.2 RAC.
• Support for HP-UX 11i v2 and 11i v3 on HP 9000 and HP Integrity
servers.
• Starting with version A.11.17, all log messages from cmgmsd will log
to /var/adm/syslog/syslog.log by default.
• All nodes in the cluster must be either SGeRAC nodes or
Serviceguard nodes. Also, SGeRAC cluster must have SGeRAC
software installed on all nodes. SGeRAC version A.11.17 and
A.11.17.01 will enforce this homogeneity requirement at cluster
creation and formation.