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Theoretically? An infinite number of nodes can publish to the same topic.

Practically? Until you run out of CPU, memory or network bandwidth. But even then there is no real limit, things will just get really, really, really slow and unreliable.

Theoretically? An infinite number of nodes nodes publishers can publish to the same topic.

Practically? Until you run out of CPU, memory or network bandwidth. But even then there is no real limit, things will just get really, really, really slow and unreliable.