About: Distributed Evaluation of XPath Axes Queries over Large XML Documents Stored in MapReduce Clusters

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Attributes	Values
rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
rdfs:seeAlso	http://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=6974858
Description	The MR (MapReduce) framework, a programming model for parallel computation over data stored in a cluster of commodity computers, established itself as one of the leading solutions for Big Data processing. This framework is also being used like a query language in many database systems, because it can process data stored in various unstructured, semi-structured, and structured formats. Nevertheless, the MR framework can be used for XML data processing too, it does not allow to write queries in a declarative manner, like XPath or XQuery. To overcome this problem, we propose a system that enables to query XML data with XPath, but it evaluates the queries in parallel using the MR framework. First, we introduce a persistent storage that maps XML data into a wide-column store. The proposed mapping enables efficient and distributed data processing. Secondly, we describe a query processor translating an XPath language subset to MR jobs. Finally, we present tests and their results showing the scalability of our system. The MR (MapReduce) framework, a programming model for parallel computation over data stored in a cluster of commodity computers, established itself as one of the leading solutions for Big Data processing. This framework is also being used like a query language in many database systems, because it can process data stored in various unstructured, semi-structured, and structured formats. Nevertheless, the MR framework can be used for XML data processing too, it does not allow to write queries in a declarative manner, like XPath or XQuery. To overcome this problem, we propose a system that enables to query XML data with XPath, but it evaluates the queries in parallel using the MR framework. First, we introduce a persistent storage that maps XML data into a wide-column store. The proposed mapping enables efficient and distributed data processing. Secondly, we describe a query processor translating an XPath language subset to MR jobs. Finally, we present tests and their results showing the scalability of our system. (en)
Title	Distributed Evaluation of XPath Axes Queries over Large XML Documents Stored in MapReduce Clusters Distributed Evaluation of XPath Axes Queries over Large XML Documents Stored in MapReduce Clusters (en)
skos:prefLabel	Distributed Evaluation of XPath Axes Queries over Large XML Documents Stored in MapReduce Clusters Distributed Evaluation of XPath Axes Queries over Large XML Documents Stored in MapReduce Clusters (en)
skos:notation	RIV/68407700:21240/14:00224323!RIV15-MSM-21240___
http://linked.open...avai/riv/aktivita	S
http://linked.open...avai/riv/aktivity	S
http://linked.open...vai/riv/dodaniDat	2015
http://linked.open...aciTvurceVysledku	Šenk, Adam
http://linked.open.../riv/druhVysledku	D - Článek ve sborníku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	České vysoké učení technické v Praze / Fakulta informačních technologií
http://linked.open...dnocenehoVysledku	11827
http://linked.open...ai/riv/idVysledku	RIV/68407700:21240/14:00224323
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	XML; MapReduce; XPath; Hadoop; HBase; Parallel databases; Distributed databases; Dewey Index; Scalability (en)
http://linked.open.../riv/klicoveSlovo	Dewey Index Parallel databases MapReduce XPath XML HBase Hadoop Distributed databases Scalability
http://linked.open...ontrolniKodProRIV	[316BBFF51AA2]
http://linked.open...v/mistoKonaniAkce	Munich
http://linked.open...i/riv/mistoVydani	Los Alamitos, CA
http://linked.open...i/riv/nazevZdroje	Database and Expert Systems Applications (DEXA), 2014 25th International Workshop on
http://linked.open...in/vavai/riv/obor	IN
http://linked.open...ichTvurcuVysledku	1 (xsd:int)
http://linked.open...cetTvurcuVysledku	3 (xsd:int)
http://linked.open...UplatneniVysledku	2014
http://linked.open...iv/tvurceVysledku	Valenta, Michal Šenk, Adam Benn, W.
http://linked.open...vavai/riv/typAkce	WRD - Světová
http://linked.open.../riv/zahajeniAkce	2014-09-01 (xsd:date)
issn	1529-4188
number of pages	5 (xsd:int)
http://bibframe.org/vocab/doi	10.1109/DEXA.2014.59
http://purl.org/ne...btex#hasPublisher	IEEE Computer Soc.
https://schema.org/isbn	978-1-4799-5722-4
http://localhost/t...ganizacniJednotka	21240

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