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On the Performance of Consistent WideArea Database Replication Yair Amir # Claudiu Danilov # Michal MiskinAmir + Jonathan Stanton #

Summary: On the Performance of Consistent Wide­Area Database Replication
Yair Amir # Claudiu Danilov # Michal Miskin­Amir + Jonathan Stanton #
Ciprian Tutu #
Technical Report
December 10th, 2003
In this paper we design a generic, consistent replication architecture that enables transparent
database replication and we present the optimizations and tradeo#s of the chosen design. We
demonstrate the practicality of our approach by building a prototype that replicates a Post­
greSQL database system. We provide experimental results for consistent wide­area database
replication. We claim that the use of an optimized synchronization engine is the key to building
a practical synchronous replication system for wide­area network settings.
1 Introduction
In many Internet applications, a large number of users that are geographically dispersed may
routinely query and update the same database. In this environment, a centralized database is
exposed to several significant risks:
. performance degradation due to high server load.
. data­loss risk due to server crashes.


Source: Amir, Yair - Department of Computer Science, Johns Hopkins University


Collections: Computer Technologies and Information Sciences