MQTT CLIENT PUBLISHER EDGE A EDGE B SUB 1 SUB 2 SUB 3 CORE 1 RAFT OLRIC REDIS PRIMARY CORE 2 RAFT OLRIC REDIS REPLICA CORE 3 RAFT OLRIC REDIS REPLICA Claim Session ✓ gRPC ZERO PAYLOAD REPLICATION Cache Miss AP DISTRIBUTED ROUTING Leader Election AUTOMATIC REDIS FAILOVER Strongly Consistent Control Plane AP Distributed Routing Zero Payload Replication Automatic Redis Failover Horizontally Scalable Edge