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A reparable database management system has the ability to automatically undo the set of transactions that are corrupted by a human error or malicious attack. The key technical challenge to building repairable database management systems is how to accurately and efficiently keep track of inter-transaction dependencies due to data sharing through a database or through an application. With these advanced inter-transaction dependency tracking mechanisms, Blastema significantly improves the availability of modern DBMSs by facilitating and sometimes even automating the damage repair process after a human error or a malicious attack. Performance measurements on a fully operational Blastema prototype run under the TPC-C benchmark show that the average run-time throughput penalty of the proposed inter-transaction dependency tracking mechanisms is less than 18%.
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