HP Serviceguard A.11.20.10 for Linux Release Notes, December 2012

Features not supported in this version
• Red Hat Enterprise Linux GFS and reiserfs file systems on SUSE Linux Enterprise Server
• Xen
• Hardware support X86 (32 bit)
• CLX is not supported with Serviceguard A.11.20.xx or later. Metrocluster for Linux products
replace CLX functionality.
For more information about Metrocluster for Linux products, see http://www.hp.com/info/
sglx.
About the new features
The subsections that follow discuss the major new capabilities introduced in the A.11.20.10 release.
For more information about using these capabilities, see Managing HP Serviceguard A.11.20.10
for Linux manual at http://www.hp.com/go/linux-serviceguard-docs.
Support for forceful halt
When halting modular failover packages, Serviceguard ignores any failures and forcefully halts
all the modules of the package. This causes the package to halt ungracefully. Consequently, the
restart of the same package can take more time owing to file system recovery or other reasons.
This enhancement provides a means by which you can use the cmhaltpkg command to safely
halt a package and thus avoid any startup time penalty during the restart of the package.
When you use the cmhaltpkg command, Serviceguard aborts the package halt when a
non-Serviceguard module reports failure. You can manually fix the failure or re-run the cmhaltpkg
command to gracefully halt the package.
You can forcefully halt the package using the cmhaltpkg -f option.
For more information about foreceful halt, see:
• cmhaltpkg(1m) manpages.
• Managing HP Serviceguard A.11.20.10 for Linux manual.
Support for WBEM providers on SUSE
Web-Based Enterprise Management (WBEM) is a set of management and Internet standard
technologies developed to unify the management of distributed computing environments, facilitating
the exchange of data across disparate technologies and platforms.
Serviceguard WBEM provider allows you to get the basic Serviceguard cluster information via the
Common Information Model Object Manager (CIMOM) technology. It also sends notification
(WBEM Indications) of Serviceguard cluster events to Serviceguard WBEM Indication subscribers
that have registered a subscription with the SFCB (for SUSE Linux Enterprise Server) or cimserver
(for Red Hat Enterprise Linux Server).
For more information, see Serviceguard WBEM Provider section in the Managing HP Serviceguard
A.11.20.10 for Linux manual.
Enhancement to XDC environment of Serviceguard
An extended distance cluster (also known as extended campus cluster) is a normal Serviceguard
cluster that has alternate nodes located in different data centers separated by some distance, with
a third location supporting the quorum service. Extended distance clusters are connected using a
high speed cable that guarantees network access between the nodes as long as all the guidelines
for disaster recovery architecture are followed. XDC employs software RAID mirroring to replicate
data. Using Linux MD, Serviceguard-xdc ensures high availability of data.
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