HP Serviceguard Version A.11.20 Release Notes, February 2014

concurrent_vgchange_operations, controls how many volume groups the package can
activate simultaneously.
IMPORTANT: Make sure you read the configuration file comments for both
concurrent_vgchange_operations and enable_threaded_vgchange before configuring
these options, as well as the vgchange (1m) manpage.
About the Alternate Quorum Server Subnet
Serviceguard A.11.20 allows you to configure an alternate subnet for communication between
the cluster nodes and the Quorum Server. You can do this from the command line or in Serviceguard
Manager. For details and instructions, see the HP Serviceguard Quorum Server Version A.04.00
Release Notes at http://www.hp.com/go/hpux-serviceguard-docs —> HP Serviceguard
Quorum Server Software.
IMPORTANT: This capability requires Quorum Server Version A.04.00. (It was also provided in
a patch to Serviceguard A.11.18 with Quorum Server Version A.03.00, but Quorum Server Version
A.03.00 does not support an alternate subnet with Serviceguard A.11.20 or A.11.19.) See
“Quorum Server Upgrade Required if You Are Using an Alternate Address” (page 9).
About LVM 2.x
Logical Volume Manager (LVM) 2.x 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 A.11.19 or later. (This support was first
introduced in a patch to Serviceguard A.11.18.)
NOTE: You are not required to move to LVM 2.x volume groups and everything will work as
before if you do nothing.
If you do use LVM 2.x 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 2.0 Volume Groups in HP-UX 11i v3 at http://
www.hp.com/go/hpux-core-docs. For information about all other aspects of LVM on HP-UX 11i
v3, see the Logical Volume Management volume (volume 3) of the HP-UX System Administrator’s
Guide, at the same address.
About cmappmgr
cmappmgr is an utility that allows you launch and monitor processes on HP Virtual Machine (HPVM)
guest nodes. For information about HPVM, See “Support for HP Integrity Virtual Machines (HPVM)”
(page 33).
cmappmgr is operating-system-independent, supporting HP-UX, Linux, and Windows VMs.
cmappmgr on the host communicates via SSL connections with a lightweight module on the VM
guest, cmappserver. cmappmgr exits when the process that is being monitored does. It can be
run as a service in a Serviceguard package, or invoked from an external script in a modular
package or from a run and halt script in a legacy package. (See Chapter 6 of Managing
Serviceguard for information about modular and legacy packages.)
cmappmgr is packaged as a Serviceguard command. cmappserver is packaged as a depot,
rpm, or exe (for HP-UX, Linux, or Windows respectively) which can be copied from the host to a
VM guest and installed there.
For more information see the white paper Designing High Availability Solutions with HP Serviceguard
and HP Integrity Virtual Machines, which you can find at the address given under “Documents for
This Version” (page 34).
Features Introduced Before A.11.20 31