Improving Performance in Distributed Database Systems Using Speculative Transaction Processing

TL;DRAbstract

In distributed database systems (DDBSs), a transaction acquires the locks on the data objects during the execution and releases them only after the completion of commit processing. In DDBSs, it can be observed that, even though a transaction produces new data object values on completion of execution and these new data object values are not affected during commit processing, the locks are released only after completion of commit processing. In this paper, we propose speculative distributed transaction processing (SDTP) approach, which allows the transaction to release locks on the data objects on completion of its execution. On completion of transaction's execution, by accessing both original and updated values, the waiting transaction carries out speculative executions and then starts commit processing. Before the end of commit processing, the transaction that has carried out speculative executions retains appropriate execution based on the termination decisions of preceding t

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