Filter
Top Products
Appendix B 501
Administration of MC/ServiceGuard
Introducing MC/ServiceGuard
Introducing MC/ServiceGuard
Multi-Computer/ServiceGuard is a powerful hardware and software
solution that can switch control from one ITO management server to
another if a management server fails. Critical information is stored on
shared disks that are also mirrored. Uninterruptible power supplies
(UPS) are also included to guarantee continuous operation if a power
failure occurs.
A highly-available computer system is one that provides access to your
data and applications if a system component fails, for example, a CPU or
network-interface card.
When your system includes MC/ServiceGuard, your applications can be
transferred automatically and quickly from a failed CPU to a functioning
CPU. To provide this extra level of confidence, you must have the
necessary system components. For example, two or more CPUs and two
or more independent disks allow a configuration that eliminates single
points of failure. In addition, MC/ServiceGuard also provides the
software support to control the transfer of your applications to another
CPU or network after a system failure. MC/ServiceGuard can also be
used to transfer the control of the running applications to another CPU
during maintenance of either management server.
The systems belonging to the MC/ServiceGuard installation make up a
ServiceGuard cluster.
Glossary of MC/ServiceGuard Terms
The following terms are used in this section:
Package An application together with associated programs,
resources, and files. Control of the package may be
transferred to another CPU in the event of failure of
the original CPU or network. Note that a package can
run only once in an SG cluster.
Service A process that is monitored by MC/ServiceGuard. A
service can be an application program, or the resources
needed by an application program. Services are started
by starting a package, and stopped by halting a