HP Serviceguard Version A.11.17 on HP-UX 11i v3 Release Notes, February 2007

Serviceguard Version A.11.17 on HP-UX 11i v3 Release Notes
Announcements
Chapter 110
Online Replacement of LAN Cards Requires Patch
Before you can replace a LAN card online (without bringing down the
cluster) as described under “Replacing LAN or Fibre Channel Cards” in
chapter 8 of Managing Serviceguard, you must apply patch PHNE_35894.
See “Patches and Fixes in this Version” on page 46 and “JAGag27186
(SR8606472298): OLR of a LAN Card in SG cluster fails” on page 55.
For more information about replacing interface cards online, see the
Interface Card OL* Support Guide for HP-UX 11i v3, at
http://docs.hp.com -> High Availability -> System
Administration.
Optimizing Performance when Activating LVM
Volume Groups
If a package activates a large number of volume groups, you can improve
the package’s start-up and shutdown performance by carefully tuning
the CONCURRENT_VGCHANGE_OPERATIONS parameter in the package
control script.
Tune performance by increasing this parameter a little at a time and
monitoring the effect on performance at each step; stop increasing it, or
reset it to a lower level, as soon as performance starts to level off or
decline.
Factors you need to take into account include the number of CPUs, the
amount of available memory, the HP-UX kernel settings for nfile and
nproc, and the number and characteristics of other packages that will be
running on the node.
NOTE Remember to do this exercise not only on the node on which the package
will normally run, but also on the node with the least resources in the
cluster, as a failover or other unexpected circumstances could result in
that node running the package.
For more information, see the section “Optimizing for Large Numbers of
Storage Units” in chapter 6 of the latest edition of Managing
Serviceguard (in the High Availability collection on docs.hp.com) and
the comments in the package control script template file.