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In a Pull data sharing model, the data is stored only on the Primary Node private store and not replicated over to other nodes private stores, when a Primary Node wants to share data with other nodes, he will can notify those nodes by utilizing the network layer broadcast pub-sub capability, when other nodes will require to read the private data, they will issue a request-response network call to the Primary Node in order to retrieve the private data.
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In a Push data sharing model, the data is stored on the Primary Node private store and also replicated on all of the nodes private store whom the Primary Node shared the data with, in this model the Primary Node will utilize the network layer broadcast pub-sub capability in order to push the data into the nodes he desire to share the data with, any change or update to the shared data will be pushed by the Primary Node to all nodes which the piece of data is shared with.
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