Virtual time synchronization in distributed database systems using a cluster of workstations

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Virtual Time is the fundamental concept in optimistic synchronization schemes. In this paper, we investigate the efficiency of a distributed database management system. synchronized by virtual time using a LAN connected collection of SPARCS. To the best of our knowledge, there is little data reporting VT performance in DDBMS. The experimental results are compared with a multiversion timestamp ordering (MVTO) concurrency control method, a widely used technique in distributed databases, and approximately 25–30% reduction in the response time is observed when using the VT synchronization scheme. Our results demonstrate that the VT synchronization approach is a viable alternative concurrency control method for distributed database systems and outpforms MVTO one.