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WELCOM '01 Proceedings of the Second International Workshop on Electronic Commerce
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IDEAS '99 Proceedings of the 1999 International Symposium on Database Engineering & Applications
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ICSOC'05 Proceedings of the Third international conference on Service-Oriented Computing
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DSDT is a proposed method for creating durable scripts which contain short ACID transactions as components. Workflow scripts are an example. The context of the script is made durable by writing a log record whenever an event occurs which cannot be replayed. Log checkpoints are used to minimize recovery time. DSDT can be written in stand-alone mode communicating with DBMSs by transactional remote procedure calls and maintaining its own logging system or it can be made part of a DBMS by modifying the DBMS transaction manager source code. DSDT provides a panic button (signal-exit) and the ability to specify what action should be taken on restart after system failure. The programmer can also specify actions such as "compensation" transactions to be taken after another signal (signal-cancel) arrives. DSDT enables most extended transaction models to be expressed in scripts modulo the guarantees of compensation. Recovery after system failure is shown to be correct.