Serviceguard Extension for RAC Version A.11.18 Release Notes, 2nd Edition, December 2007

Serviceguard Extension for RAC Version A.11.18 Release Notes
What’s in this Version
Chapter 116
Support for 8192 Oracle Server Processes for Oracle
9i RAC
The maximum number of Oracle server processes cmgmsd can handle is
8192. When there are more than 8192 server processes connected to
cmgmsd, it will start to reject new requests. Oracle foreground server
processes are needed to handle the requests of the Data Base (DB) client
connected to the DB instance.
Serviceguard Extension for RAC does not support
Mixed Clusters
For SGeRAC, the nodes in the cluster must be on the same architecture.
SGeRAC does not support clusters containing mixed architectural nodes,
which consist of HP 9000 and HP Integrity servers, or different
operating system releases.
About Device Special Files (DSFs)
HP-UX releases up to and including 11i v2 use a naming convention for
device files that encodes their hardware path. For example, a device file
named /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 pre-11i v3 device files, which as of 11i v3 are
referred to as legacy device files. Device files using the new
nomenclature are called persistent device files, When you upgrade to
HP-UX 11i v3, a set of new, persistent device files is created, but the
existing, legacy device files are left intact and by default will continue to
be used by HP-UX and Serviceguard.