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Relaxed Currency Serializability for
Middle-Tier Caching and Replication
(extended version).
April 1, 2006

Download PDF

BibTex
Authors

Philip A. Bernstein

Alan Fekete

Hongfei Guo

Raghu Ramakrishnan

Pradeep Tamma

Phil Bernstein
Publication Type
TechReport
Pages
18
Number
MSR-TR-2006-34

Abstract

Related Info
Abstract
Many applications, such as e-commerce, rou¬tinely use copies of data that are not in sync with
the database due to heuristic caching strategies used to enhance perform¬ance. We study
concurrency control for a transactional model that allows update transactions to read out-of-date
copies. Each read operation carries a “fresh¬ness constraint― that specifies how fresh a
copy must be in order to be read. We offer a defini¬tion of correctness for this model and
present algorithms to ensure several of the most interesting fresh¬ness constraints. We outline
a serializability-theoretic correctness proof and present the results of a detailed performance
study. This is an extended version of a paper with the same title that appeared in SIGMOD 2006.
Related Info
Related Files
 tr-2006-34.doc
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 Microsoft Research Lab - Redmond
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