Managing Serviceguard Extension for SAP, December 2007

SAP Supply Chain Management
SGeSAP Package Configuration
Chapter 4228
The LCMONITORINTERVAL variable specifies how often the monitoring
polling occurs (in sec.)
LC193 hot standby Installation Step:
The following additional parameters in sap.config have to be set for a hot
standby liveCache package:
Hot standby systems have a preferred default machine for the instance
with the master role. This should usually correspond to the hostname of
the primary node of the package. The hostname of the failover node
defines the default secondary role, i.e. the default standby and
alternative master machine. For a hot standby system to become
activated, the LC_PRIMARY_ROLE and the LC_SECONDARY_ROLE
need to be defined with physical hostnames. No virtual addresses can be
used here.
LC_PRIMARY_ROLE=<primary_node>
LC_SECONDARY_ROLE=<secondary_node>
A hot standby initialization during startup might require
hardware-based copy mechanisms of the underlying storage array.
Currently HP StorageWorks XP arrays with BCV volumes are
supported. The following parameter needs to be set:
LC_COPY_MECHANISM=BUSINESSCOPY
LC197 Optional hot standby Installation Step:
A hot standby initialization procedure can perform a plausibility check of
its storage configuration. Presaved world-wide IDs of LUNs are
compared with current world-wide IDs to prevent that outdated
configuration information is used for cloning. This adds to the robustness
of the initialization process, but for large implementations it
significantly slows down the standby startup. By setting:
AVOID_WWID_CHECK=1
in sap.config the check can be turned off.