NDLI: Extending Speculation-Based Protocols for Processing Read-Only Transactions in Distributed Database Systems

Content Provider	IEEE Xplore Digital Library
Author	Goyal, M. Ragunathan, T. Reddy, P.K.
Copyright Year	2010
Abstract	The main issues in processing read-only transactions (ROTs) are correctness, data currency and performance. The popular two-phase locking (2PL) protocol processes the transactions correctly according to serializability criteria, but its performance deteriorates with data contention. To improve the performance, snapshot isolation (SI)-based approaches have been proposed. Even though SI-based approaches improve performance, however they compromise both correctness and data currency aspects. In the literature, an effort has been made to propose improved approaches to process ROTs based on the notion of speculation. The speculation-based approaches improve performance without compromising both correctness and data currency aspects. In this paper, we have extended the speculation-based protocols for processing ROTs in a distributed database systems. It has been identified that an ROT under speculation-based protocols in distributed database systems require a commit phase. In addition, additional messages are required for making speculative versions available to ROTs during the execution phase of an update transaction. In spite of these overheads, the proposed protocols reduce the waiting time of ROTs significantly by increasing the parallelism without violating both correctness and data currency aspects. The simulation experiments show that the proposed protocols significantly improve the performance over 2PL and SI-based protocols.
Starting Page	527
Ending Page	532
File Size	242430
Page Count	6
File Format	PDF
ISBN	9781424483358
DOI	10.1109/HPCC.2010.69
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-09-01
Publisher Place	Australia
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Decision support systems speculation transaction-processing high-performance Protocols concurrency control distributed databases Throughput Database systems Silicon Servers read-only transactions
Content Type	Text
Resource Type	Article

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