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We sometimes get questions from users on how to ensure Master-Worker pattern within peer-to-peer (P2P) architecture in GridGain. When designing our API and our deployment model, we purposely went with P2P architecture because we wanted to have ultimate freedom on how a grid node is used. As a result, in GridGain a node can act as master or worker or both, depending on your configuration. Moreover, you don't even have to change a single line of code to get this to work.