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2013/02/08 14:33 popel Milan improved our Hadoop2012/02/05 21:24 straka 2012/02/05 21:21 straka 2012/02/05 21:21 straka 2012/02/05 21:19 straka 2012/02/05 21:16 straka 2012/02/05 21:15 straka 2012/02/05 21:15 straka 2012/02/05 21:15 straka 2012/02/05 21:14 straka 2012/02/05 21:06 straka 2012/02/05 21:05 straka 2012/02/05 21:04 straka 2012/02/05 20:00 straka 2012/02/05 19:37 straka vytvořeno Go Next revision		Previous revision 2013/02/08 14:33 popel Milan improved our Hadoop2012/02/05 21:24 straka 2012/02/05 21:21 straka 2012/02/05 21:21 straka 2012/02/05 21:19 straka 2012/02/05 21:16 straka 2012/02/05 21:15 straka 2012/02/05 21:15 straka 2012/02/05 21:15 straka 2012/02/05 21:14 straka 2012/02/05 21:06 straka 2012/02/05 21:05 straka 2012/02/05 21:04 straka 2012/02/05 20:00 straka 2012/02/05 19:37 straka vytvořeno Go Next revision Both sides next revision
courses:mapreduce-tutorial:running-jobs [2012/02/05 19:37] straka vytvořeno		courses:mapreduce-tutorial:running-jobs [2012/02/05 21:15] straka
Line 1:		Line 1:
-	====== MapReduce Tutorial : ======	+	====== MapReduce Tutorial : Running jobs ======
		+
		+	The input of a Hadoop job is either a file, or a directory. In latter case all files in the directory are processed.
		+
		+	The output of a Hadoop job must be a directory, which does not exist.
		+
		+	===== Run Perl jobs =====
		+	Choosing mode of operation:
		+	| ^ Command ^
		+	^ Run locally | ''perl script.pl input output'' |
		+	^ Run using specified jobtracker | ''perl script.pl -jt jobtracker:port input output'' |
		+	^ Run job in dedicated cluster | ''perl script.pl -c number_of_machines input output'' |
		+	^ Run job in dedicated cluster and after it finishes, \\ wait for //W// seconds before stopping the cluster | ''perl script.pl -c number_of_machines -w W_seconds input output'' |
		+
		+	Specifying number of mappers and reducers:
		+	| ^ Command ^
		+	^ Run using //R// reducers \\ (//R//>1 not working when running locally)| ''perl -r R script.pl input output'' |
		+	^ Run using //M// mappers | ''perl script.pl `/net/projects/hadoop/bin/compute-splitsize input M` input output'' |
		+
		+	===== Run Java jobs =====
		+	Choosing mode of operation:
		+	| ^ Command ^
		+	^ Run locally | ''/net/projects/hadoop/bin/hadoop job.jar input output'' |
		+	^ Run using specified jobtracker | ''/net/projects/hadoop/bin/hadoop job.jar -jt jobtracker:port input output'' |
		+	^ Run job in dedicated cluster | ''/net/projects/hadoop/bin/hadoop job.jar -c number_of_machines input output'' |
		+	^ Run job in dedicated cluster and after it finishes, \\ wait for //W// seconds before stopping the cluster | ''/net/projects/hadoop/bin/hadoop job.jar -c number_of_machines -w W_seconds input output'' |
		+
		+	Specifying number of mappers and reducers:
		+	| ^ Command ^
		+	^ Run using //R// reducers \\ (//R//>1 not working when running locally)| ''perl -r R script.pl input output'' |
		+	^ Run using //M// mappers | ''/net/projects/hadoop/bin/hadoop job.jar `/net/projects/hadoop/bin/compute-splitsize input M` input output'' |

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