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Online aggregation and continuous query support in MapReduce

Published: 06 June 2010 Publication History

Abstract

MapReduce is a popular framework for data-intensive distributed computing of batch jobs. To simplify fault tolerance, the output of each MapReduce task and job is materialized to disk before it is consumed. In this demonstration, we describe a modified MapReduce architecture that allows data to be pipelined between operators. This extends the MapReduce programming model beyond batch processing, and can reduce completion times and improve system utilization for batch jobs as well. We demonstrate a modified version of the Hadoop MapReduce framework that supports online aggregation, which allows users to see "early returns" from a job as it is being computed. Our Hadoop Online Prototype (HOP) also supports continuous queries, which enable MapReduce programs to be written for applications such as event monitoring and stream processing. HOP retains the fault tolerance properties of Hadoop, and can run unmodified user-defined MapReduce programs.

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cover image ACM Conferences
SIGMOD '10: Proceedings of the 2010 ACM SIGMOD International Conference on Management of data
June 2010
1286 pages
ISBN:9781450300322
DOI:10.1145/1807167
Permission to make digital or hard copies of all or part of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage and that copies bear this notice and the full citation on the first page. Copyrights for components of this work owned by others than ACM must be honored. Abstracting with credit is permitted. To copy otherwise, or republish, to post on servers or to redistribute to lists, requires prior specific permission and/or a fee. Request permissions from [email protected]

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Association for Computing Machinery

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Publication History

Published: 06 June 2010

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  1. mapreduce

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  • Demonstration

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SIGMOD/PODS '10
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SIGMOD/PODS '10: International Conference on Management of Data
June 6 - 10, 2010
Indiana, Indianapolis, USA

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