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Apache Spark est un framework originellement écrit en Scala permettant de réaliser des opérations de façon distribué selon le paradigme MapReduce. Son abstraction de base est le RDD pour Resilient Distributed Dataset sur lequel vont s'effectuer les différentes opérations de Map et de Reduce.
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We use an emerged open-source implementation named Spark , which is adapted to machine learning algorithms and supports applications with working sets while providing similar scalability and fault tolerance properties to MapReduce. The great Spark power is being able to put the RDD in RAM, the time saved is considerable on algorithms iteratively using the same data set.
   Exception encountered, of type "Error"
[c3643f65] /bigdata/index.php?diff=137&oldid=30&title=Apache_Spark Error from line 434 of /home/bigdata/includes/diff/DairikiDiff.php: Call to undefined function each()
Backtrace:
#0 /home/bigdata/includes/diff/DairikiDiff.php(544): DiffEngine->diag()
#1 /home/bigdata/includes/diff/DairikiDiff.php(344): DiffEngine->compareSeq()
#2 /home/bigdata/includes/diff/DairikiDiff.php(227): DiffEngine->diffLocal()
#3 /home/bigdata/includes/diff/DairikiDiff.php(721): DiffEngine->diff()
#4 /home/bigdata/includes/diff/DairikiDiff.php(859): Diff->__construct()
#5 /home/bigdata/includes/diff/DairikiDiff.php(980): MappedDiff->__construct()
#6 /home/bigdata/includes/diff/TableDiffFormatter.php(194): WordLevelDiff->__construct()
#7 /home/bigdata/includes/diff/DiffFormatter.php(140): TableDiffFormatter->changed()
#8 /home/bigdata/includes/diff/DiffFormatter.php(111): DiffFormatter->block()
#9 /home/bigdata/includes/diff/DifferenceEngine.php(881): DiffFormatter->format()
#10 /home/bigdata/includes/diff/DifferenceEngine.php(797): DifferenceEngine->generateTextDiffBody()
#11 /home/bigdata/includes/diff/DifferenceEngine.php(728): DifferenceEngine->generateContentDiffBody()
#12 /home/bigdata/includes/diff/DifferenceEngine.php(662): DifferenceEngine->getDiffBody()
#13 /home/bigdata/includes/diff/DifferenceEngine.php(632): DifferenceEngine->getDiff()
#14 /home/bigdata/includes/diff/DifferenceEngine.php(453): DifferenceEngine->showDiff()
#15 /home/bigdata/includes/page/Article.php(797): DifferenceEngine->showDiffPage()
#16 /home/bigdata/includes/page/Article.php(508): Article->showDiffPage()
#17 /home/bigdata/includes/actions/ViewAction.php(44): Article->view()
#18 /home/bigdata/includes/MediaWiki.php(490): ViewAction->show()
#19 /home/bigdata/includes/MediaWiki.php(287): MediaWiki->performAction()
#20 /home/bigdata/includes/MediaWiki.php(714): MediaWiki->performRequest()
#21 /home/bigdata/includes/MediaWiki.php(508): MediaWiki->main()
#22 /home/bigdata/index.php(41): MediaWiki->run()
#23 {main}