HP-UX 11i June 2003 Release Notes

HP-UX 11i Version 1.0 Operating Environment Applications
HP-UX 11i Mission Critical Operating Environment (MCOE)
Chapter 6
132
MC/ServiceGuard
Multi-Computer/ServiceGuard (MC/ServiceGuard) is a specialized facility for protecting
mission critical applications from a wide variety of hardware and software failures.
MC/ServiceGuard is used to create high-availability clusters of HP servers. Computer
systems with high-availability clusters allow applications to continue in spite of a
hardware or software failure. Such systems protect users from software failures as well
as from failure of a system processing unit (SPU) or local area network (LAN)
component. In the event that one component fails, the redundant component takes over
and MC/ServiceGuard coordinates the transfer between components.
ServiceGuard Manager, the graphical user interface (GUI) for ServiceGuard, is available
from http://software.hp.com or from the ServiceGuard Distributed Components CD.
ServiceGuard Manager installs on HP-UX, Linux, and Windows.
The Distributed Components CD also includes Quorum Server, which is supported as a
type of cluster lock mechanism different from the lock disk.
NOTE When you purchase the Mission Critical OE, it is assumed that you want
MC/ServiceGuard, not ServiceGuard Extension for RAC (replacing ServiceGuard OPS
Edition). MC/ServiceGuard and ServiceGuard Extension for RAC cannot coexist on the
same system. Users of ServiceGuard Extension for RAC are encouraged to purchase and
install the Enterprise OE and then install ServiceGuard Extension for RAC. For more
information, see Managing MC/ServiceGuard and Using ServiceGuard Extension for
Real Application Cluster (RAC), both available at http:docs.hp.com.
updated for June
2003
MC/ServiceGuard has been updated to version 11.15 with the following changes:
• Support for IPv6, with some restrictions which are listed in the product Release
Notes.
• The cmrunnode and cmruncl commands now do a validation check of networks by
default. ServiceGuard probes the existing network setup to be sure it matches the
information in its configuration files. The check is recommended, but can be skipped
with an option.
• ServiceGuard configuration commands cmcheckconf and cmapplyconf have a new
option that enables these commands to respond faster on systems with large storage
networks, such as a SAN. With the -K option, ServiceGuard will check connectivity
for only the cluster lock volume groups, and will skip all other LVM volume groups.
• The user's manual Managing MC/ServiceGuard (B3936-90065) has been revised
and corrected for this release.
• MC/ServiceGuard no longer supports the use of FibreChannel networking for the
heartbeat or data LAN, except on releases prior to A.11.12
• MC/ServiceGuard A.11.15 supports up to 200 relocatable package IP addresses per
cluster. This can be a combination of IPv4 and IPv6 addresses
• On Ethernet networks, MC/ServiceGuard supports local failover between network
interfaces configured with “Ethernet protocol” or between network interfaces
configured with “SNAP encapsulation within IEEE 802.3 protocol.” You cannot use
both protocols on the same interface, nor can you have a local failover between
interfaces that are using different protocols.