OSI/MHS Configuration and Management Manual

Introduction to OSI/MHS
OSI/MHS Configuration and Management Manual—424827-003
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Message Relay (MR) Group
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Receives and responds to commands sent by management applications that
exchange Subsystem Programmatic Interface (SPI) messages with the SCP
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Receives and responds to commands from the SCF product module (through the
SCP)
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Maintains the configuration database
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Provides online configuration ability
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Maintains the states of objects under its control
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Uses the Transaction Management Facility (TMF) for database configuration
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Reports significant events to the Event Management Service (EMS)
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Reports accounting information as events to EMS
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Responds to statistics and status information
The process name for the MHS manager starts with a dollar sign ($), followed by one
alphabetic and up to three alphanumeric characters: for example, $ZMHS.
Message Relay (MR) Group
The message relay (MR) group transfers messages and supports the P1 protocol. It
receives and transfers messages to and from adjacent MTAs, message stores, or
gateways. The MR group makes copies of each message (if it is a multirecipient
message) and transfers copies to all the destinations for which it is responsible:
adjacent MTAs, MS groups, general user gateways, or Transfer X400 gateways. The
MR group also generates delivery and nondelivery reports.
The MR group provides an interface to OSI addresses for incoming and outgoing
associations. It provides checkpoint and recovery services in the event of a connection
failure so that a message transfer can be recovered from the point where the network
failure occurred. Figure 1-8 shows the MR group.