一种基于工作流的长事务恢复方法的研究

H.Garcia-Molina等人提出了用于解决长事务问题的Sagas模型,但Sagas模型的事务补偿过程会撤销整个长事务,另外每个子事务都必须具有补偿子事务,这两个缺陷大大影响了Sagas模型的执行效率和适用性.文中提出了一种基于执行历史的层次式的失效恢复算法.该算法动态确定补偿终止点,可有效减小补偿域. 性能分析表明其性能通常优于非层次的失效恢复算法.

Research on the long transaction recovery based on the workflow

H.Garcia-Molina raised the Sagas model to solve long transaction problem,but the Sagas transaction model compensating process will compensate the whole long transaction.In addition,in the model every sub-transaction must have a compensate sub-transaction,these two deficiencies greatly affected Sagas model of efficiency and applicability.This paper proposed a failure recovery algorithm based on executed history.The algorithm determines the end compensation point dynamically,so the compensation sphere is conf...