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Research of the Performances of Multiversional Two-Phase Locking Concurrency Control Protocols

Xiang Lei

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Abstract

In parallel realtime database systems, concurrency control protocols must not only maintain the consistency constraints, but also meet time constraints. The article presents a multiversional twophase locking concurrency control protocol. It can effectively reduce the number of transactions that miss their deadlines. We compare the protocol presented with the HP2PL protocol and the OCCTIWAIT50 protocol under the shareddisk architecture by simulation. The experimental results show that the protocol performs better than the other two.

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What this paper is about

In parallel realtime database systems, concurrency control protocols must not only maintain the consistency constraints, but also meet time constraints. The article presents a multiversional twophase locking concurrency control protocol. It can effectively reduce the number of transactions that miss their deadlines. We compare the protocol presented with the HP2PL protocol and the OCCTIWAIT50 protocol under the shareddisk architecture by simulation. The experimental results show that the protocol performs better than the other two.

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Available abstract

In parallel realtime database systems, concurrency control protocols must not only maintain the consistency constraints, but also meet time constraints. The article presents a multiversional twophase locking concurrency control protocol. It can effectively reduce the number of transactions that miss their deadlines. We compare the protocol presented with the HP2PL protocol and the OCCTIWAIT50 protocol under the shareddisk architecture by simulation. The experimental results show that the protocol performs better than the other two.

Key concepts: Computer science, Concurrency control, Multiversion concurrency control, Timestamp-based concurrency control, Optimistic concurrency control, Non-lock concurrency control, Protocol (science), Two-phase locking

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