A Proposal of New Dependable Database Middleware with Consistency and Concurrency Control

We propose a new dependable database middleware that can synchronize off-the-shelf database servers for consistency and execute write queries concurrently for high throughput. Our proposal also helps to realize low cost system since both existing servers and client applications can be used without modification. We implemented a prototype using PostgreSQL without modification. Our experimental result reveals that our approach outperforms the conservative proposals.