We have developed log-based recovery for middleware servers that access back-end transaction systems (DBMSs). Transaction functionality is supported for both in-memory state stored in middleware servers and persistent state stored in back-end transaction systems. A new logging method called results logging is exploited to ensure coordinated recovery of in-memory state with persistent database state. Results logging incurs low logging overhead for middleware servers and requires little or no modification to existing back-end transaction systems. We implemented a prototype with this technique using a commercial Web services infrastructure. Our performance measurements show that results logging preserves the high performance of our prior techniques, which were developed for in-memory state recover of middleware servers in isolations from back-end transaction systems.

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In: SIGMOD Conference

Publisher: Association for Computing Machinery, Inc.
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