Oracle Video server, Manual

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Components of Oracle Video Server and Oracle Media Net
System Architecture 2-27
The address server is responsible for invalidating addresses of failed processes.
When a process on the OVS system is idle, it periodically sends a heartbeat, a
message announcing its existence, to the address server. If the address server does
not detect a message from a process for a period of minutes, the address server
assumes a failure and invalidates the process’ address.
Oracle Media Net Event Logging Daemon
The Oracle Media Net event logging daemon writes error and warning messages
for the OVS system components to a logfile. The event logging daemon is
configurable:
■
You can configure the event logging daemon to log either all messages or only
those above a severity threshold.
■
You can use message logging filters to configure the event logging daemon to
log specific information about components.
■
You can configure the maximum size of a log file. After filling a log file, the
event logging daemon automatically begins writing to a new one.
Oracle Media Net Event Log Reader
The Oracle Media Net event log reader interprets and displays information written
to the logfile by the Oracle Media Net event logging daemon to make this
information easier to interpret.
Oracle Media Net CORBA Event Service
An event is data that indicates a change in an object. The Oracle Media Net CORBA
event service provides for the notification of clients when an event occurs. When
something of note occurs in an object, an event may be generated to notify clients
of the occurrence so each client can react. For example, when a client device
requests a video content file, the stream service prepares to play the file and notifies
the CORBA event service. A billing application may note this event to bill the client
application for playing the video.
An OVS system can run only one CORBA event service.