Orleans can automatically migrate frequently communicating grains to the same hosts, reducing network calls. Here's an app running on a real cluster showing grains (small circles) being migrated between hosts to eliminate network calls (red lines).

A new feature in Orleans enables it to seamlessly balance already-active grains across your cluster as it scales or rolls. In this demo, 100K grains are activated on a single node. The cluster is scaled to 10 nodes and the grains are gradually spread across them until everything is balanced.