@leventov I wouldn't call those projects competitors. Those are in-memory data grids, which Atomix certainly is not. I think there's a lot more reason to invest in off-heap memory for a system that's designed to scale memory usage, but Atomix is not designed to scale horizontally right now. While its API design was influenced by Hazelcast, it's functionality is still very similar to ZooKeeper and Curator of Consul or any of the consensus based systems. That is, the focus is still on consistency and typically small data structures as opposed to scalability at the cost of consistency, just with a much simpler API. Scaling memory in Atomix would require a partitioning scheme. Off-heap memory would still be interesting, but the size of the map will still always be limited by the smallest machine.