Managing Serviceguard Extension for SAP, December 2007

Understanding Serviceguard Extension for SAP
Combining SGeSAP with Complementary Solutions
Chapter 142
Combining SGeSAP with Complementary
Solutions
There is a vast range of additional software solutions that can improve
the experience with SGeSAP clusters. Most of the products available
from HP can be integrated and used in combination with SGeSAP. This
is particularly true for the Serviceguard Extension for RAC (SGeRAC).
The operation of a combined SGeRAC and SGeSAP cluster gets covered
in this document as part of the descriptions that deal with Oracle RAC
database layouts. A couple of other solutions also have a high relevance
and get introduced here:
• Cluster Consistency Monitor
• Metropolitan Clusters
• Workload Manager SAP Toolkit
HP Cluster Consistency Monitor
HP Cluster Consistency Monitor is a complementary service offering to
SGeSAP available from HP Services. The basic function of the Cluster
Consistency Monitor is to compare resource configurations of nodes.
Each node that is monitored runs a program which reads a configuration
profile about named resources and creates a resource database. These
resource databases are then compared by another program and possible
error conditions are presented in an ASCII or HTML report which can be
used for troubleshooting.
Clusters exist to maintain the operation of an application even in case a
hardware resource failure. The SAP WAS environment is very complex,
depending on a number of resources on multiple servers. Some of these
resources run on the nodes in the cluster, while others are on non-cluster
nodes.
Because of this complexity, the precise definition of resources on each
server in and out of the cluster must be managed carefully. The Cluster
Consistency Monitor is a tool that assists in maintaining consistent
relationships among all component servers.