A Composable Architecture for Cloud Transactional DBMS

This paper introduces a composable architecture for cloud database systems, which is adaptable to heterogeneous workloads of real-world applications. Based on this architecture, a transactional database can be decomposed into a collection of building blocks, each of which can independently choose its implementation and its way to scale on the heterogeneous resources in the cloud. These building blocks include A concurrency control block enforcing serializable schedules of transactions, A log replication block ensuring the persistence of transactions and high availability, and A data storage block serving data accesses. Such an architecture would make implementing a cloud database more agile and significantly improve its flexibility and application range. Some preliminary experiments were conducted to demonstrate the practicality of the proposed composable architecture.