Specifications

LCM
LCM
The LifeKeeper Communications Manager (LCM) provides reliable communication between
processes on one or more LifeKeeper servers. This process can use redundant communication paths
between systems so that failure of a single communication path does not cause failure of LifeKeeper
or its protected resources. The LCM supports a variety of communication alternatives including RS-
232 (TTY) and TCP/IP connections.
The LCM provides the following:
l LifeKeeper Heartbeat. Periodic communication with other connected LifeKeeper systemsto
determine if the other systems are still functioning. LifeKeeper can detect any total system
failurethat is not detected by another meansby recognizing the absence of the heartbeat
signal.
l Administration Services. The administration functions of LifeKeeper use the LCM facilities
to perform remote administration. This facility is used for single-point administration,
configuration verificationand sanity checking of administrative actions.
l Configuration and Status Communication. The LifeKeeper configuration database (LCD)
tracks resource status, availabilityand configuration through the LCM facilities. These
facilities allow the LCD to maintain consistent resource information between the primary and
secondary systems.
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