Abstract
Real-time Main Memory DataBase systems (RTMMDB) have been recently studied to meet stringent timing and reliability constraints that exist in application areas such as telecommunications, automated control of medical patient monitoring, and computer integrated manufacturing. In these applications, transactions may be aborted if they missed their deadlines, and temporal data may become invalid before being used. Due to the volatility of main memory, the database may be lost upon a system failure caused by software errors, hardware errors, or power outage. Logging is one of the activities an RTMMDB must perform during normal operation to guarantee its recoverability from a system or transaction failure.
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