Serviceguard Extension for RAC Version A.11.19 Release Notes (May 2010)

• Support for a maximum of four nodes over distances up to 100 kilometers in an extended-distance

cluster with CFS/CVM 5.0 or 5.0.1 and LVM 2.1.

The previous maximum in this configuration was two nodes.

• Hostnames for SGeRAC cluster nodes can be up to 39 characters (bytes) long. (The former limit

was 31 characters).

NOTE:

The SLVM subsystem on HP-UX 11i v2 only supports hostnames up to 31 characters long in an

SGeRAC configuration. The cluster node name associated with a SLVM volume group will be

shown in the vgdisplay output as the first 30 characters plus an asterisk (*) if the hostname is

longer than 31 characters.

• Starting with version A.11.17, all log messages from cmgmsd log to /var/adm/syslog/sys-

log.log by default

Support for Logical Volume Manager Version 2.0 and later

Logical Volume Manager (LVM) 2.0 volume groups, which remove some of the limitations imposed

by LVM 1.0 volume groups, can be used on systems running HP-UX 11i v3 0803 Fusion or later with

LVM version B.11.31.0809 and Serviceguard and SGeRAC A.11.19. (This support was first introduced

in a patch to Serviceguard A.11.18.)

NOTE:

You are not required to move to LVM 2.0 volume groups and everything will work as before if you

do nothing.

If you

use LVM 2.0 volume groups, you can still manage them with the same commands as before,

although you may have to make minor changes to any scripts you use that parse the output of

lvdisplay, vgdisplay, pvdisplay or vgscan, as the output of these commands has changed

slightly. In addition, new options are available for some commands.

For more information, see the white paper LVM Version 2.0 Volume Groups in HP-UX 11i v3 at

http://www.hp.com/go/hpux-core-docs —> HP-UX 11i v3 —> white papers. For

information about all other aspects of LVM on HP-UX 11i v3, see the HP-UX System Administrator's

Guide: Logical Volume Management HP-UX 11i Version 3 at http://www.hp.com/go/

hpux-core-docs —> HP-UX 11i v3 —> User guide.

Support for Multi-Node Online Configuration (MORE) —LVM Version 2.1 Volume

Groups Only

Multi Node Online Reconfiguration (MORE), introduced in the HP-UX 11i v3 September 2009 release,

allows you to change the configuration of LVM Version 2.1 volume groups while the volume groups

are activated in shared mode on any number of cluster nodes. Applications can continue to use these

volume groups without interruption while the volume groups are being reconfigured.

For more information, see the white paper SLVM Online Volume Reconfiguration at http://

www.hp.com/go/hpux-core-docs —> HP-UX 11i v3 —> white papers.