Two Stores

This second example of persistence illustrates the need for two stores. The following diagram depicts two separate networks of endpoints:

  • Network A (which is familiar from the previous example) consists of endpoints EP1 and EP2, connected by direct-path transport T1.
  • Network B consists of endpoints EP3 and EP4, connected by direct-path transport T2.
    Stores Isolate Separate Message Streams

Notice these features of the example in the preceding diagram:

  • Each network carries a separate message stream: the message stream of network A is separate and disjoint from the message stream of network B.
  • Store1 backs network A, while Store2 backs network B. Each store backs only one network. Each network includes only one store.
  • Each store collects only the message stream of the network that it backs. For example, messages from network B do not enter Store1, because we deliberately kept network A separate from network B.
Related concepts