1) In-memory execution engine - It uses Redis as the core execution engine and decouples it from the durability layer. 2) Transaction log - It forms the backbo

1) In-memory execution engine - It uses Redis as the core execution engine and decouples it from the durability layer. 2) Transaction log - It forms the backbone of the durability layer. It handles data replication, leader election, and data recovery. 3) Off-box recovery - It offloads recovery of failed nodes to ephemeral clusters and S3 for performance improvements.