Apr. 2, 2001 to Apr. 6, 2001
Roger S. Barga , Microsoft Corporation
David B. Lomet , Microsoft Corporation
Abstract: High availability for both data and applications is rapidly becoming a business requirement. While database systems support recovery, providing high database availability, applications may still lose work because of server outages. When a server crashes, volatile state associated with the application's database session is lost and the application may require operator-assisted restart. This exposes server failures end-users and always degrades application availability. Our Phoenix/ODBC system supports persistent database sessions that can survive a database crash without the application being aware of the outage, except for possible timing considerations. This improves application availability and eliminates application programming needed to cope with database crashes. Phoenix/ODBC requires no changes to database system, data access routines, or applications. Hence, it can be deployed any application that uses ODBC to access a database. Further, our generic approach can be exploited for a variety of data access protocols. In this paper, we describe the design Phoenix/ODBC and introduce an extension to optimize response time and reduce overhead for OLTP workloads. We present performance evaluation using TPC-C and TPC-H benchmarks that demonstrate Phoenix/ODBC's extra overhead is modest.
Roger S. Barga, David B. Lomet, "Measuring and Optimizing a System for Persistent Database Sessions", ICDE, 2001, 2013 IEEE 29th International Conference on Data Engineering (ICDE), 2013 IEEE 29th International Conference on Data Engineering (ICDE) 2001, pp. 0021, doi:10.1109/ICDE.2001.914810