alt Hacker NewsZero-sharing message passing is known. But what about shared state? Given the majority of systems manage shared access to arbitrarily constrained shared state or shared resources, I'd be interested to see how this should be handled without just saying "database". Maybe another article?
One process is made the logical goto for all operations on that data. The process identity is logically the identity of the shared state.
In other words, it is exactly a database, albeit an in-memory one.