| 摘要 |
A publisher node in a network determines how many subscriber nodes in the network have subscribed to receive notification messages about data that is maintained by the publisher node. The publisher node also determines how many available connections the publisher node is configured to support. If the number of available connections exceeds the number of subscribers, the publisher node sends the notification messages to the subscriber nodes via a connection-based protocol. If the number of subscriber nodes exceeds the number of available connections, the publisher node sends the notification messages to the subscriber nodes via multicast. If the publisher node sends the notification messages to the subscriber nodes via multicast, the publisher node may receive one or more connection requests from subscribers that may be depending on reliably receiving the notification messages from the publisher.
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