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With the default configuration, in the same host, the shared memory transport will be used. An alternative is using UDP multicast, as explained in this section of the documentation |
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In a scenario with one publisher and four subscribers (all on the same host listening to the same topic), the publisher sends data separately to each subscriber, leading to N transmissions for N subscribers.
The publisher iterates through the destination locators and transmits data individually to each. At the transport layer, each subscriber is treated as a distinct endpoint, with the port number (representing the subscriber) embedded in the send buffer for each transmission.
Is there any ways to send data to all subscribers listening to same topic in a single transmission instead of multiple individual transmissions ?
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