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Both sides previous revision Previous revision 2012/02/06 14:52 dusek 2012/02/06 13:26 straka 2012/02/06 13:25 straka 2012/02/06 13:24 straka 2012/02/06 13:24 straka 2012/02/06 13:24 straka 2012/02/06 13:23 straka 2012/02/06 13:11 straka 2012/02/06 13:10 straka 2012/02/06 13:10 straka 2012/02/06 13:10 straka 2012/02/06 13:10 straka 2012/02/06 09:22 straka 2012/02/06 09:01 straka 2012/02/06 08:55 straka 2012/02/06 08:50 straka 2012/02/06 08:41 straka 2012/02/06 08:40 straka 2012/02/06 08:28 straka 2012/02/06 08:26 straka 2012/02/06 08:21 straka 2012/02/06 08:21 straka 2012/02/06 08:20 straka 2012/02/06 08:20 straka 2012/02/06 08:18 straka 2012/02/06 08:13 straka 2012/02/06 08:10 straka 2012/02/06 08:09 straka 2012/02/06 08:03 straka 2012/02/06 08:03 straka 2012/02/06 08:02 straka 2012/02/06 07:59 straka vytvořeno Go Next revision		Previous revision 2012/02/06 14:52 dusek 2012/02/06 13:26 straka 2012/02/06 13:25 straka 2012/02/06 13:24 straka 2012/02/06 13:24 straka 2012/02/06 13:24 straka 2012/02/06 13:23 straka 2012/02/06 13:11 straka 2012/02/06 13:10 straka 2012/02/06 13:10 straka 2012/02/06 13:10 straka 2012/02/06 13:10 straka 2012/02/06 09:22 straka 2012/02/06 09:01 straka 2012/02/06 08:55 straka 2012/02/06 08:50 straka 2012/02/06 08:41 straka 2012/02/06 08:40 straka 2012/02/06 08:28 straka 2012/02/06 08:26 straka 2012/02/06 08:21 straka 2012/02/06 08:21 straka 2012/02/06 08:20 straka 2012/02/06 08:20 straka 2012/02/06 08:18 straka 2012/02/06 08:13 straka 2012/02/06 08:10 straka 2012/02/06 08:09 straka 2012/02/06 08:03 straka 2012/02/06 08:03 straka 2012/02/06 08:02 straka 2012/02/06 07:59 straka vytvořeno Go
courses:mapreduce-tutorial:step-31 [2012/02/06 09:22] straka		courses:mapreduce-tutorial:step-31 [2012/02/06 14:52] (current) dusek
Line 35:		Line 35:
	===== Example =====		===== Example =====
-	This example reads the keys of ''/net/projects/hadoop/examples/inputs/numbers-small'', computes the sum of all the keys and print it:	+	This example reads the keys of ''/net/projects/hadoop/examples/inputs/numbers-small'', computes the sum of all the keys and prints it:
	<code java Sum.java>		<code java Sum.java>
		+	import java.io.IOException;
		+
		+	import org.apache.hadoop.conf.*;
		+	import org.apache.hadoop.fs.Path;
		+	import org.apache.hadoop.io.*;
	import org.apache.hadoop.mapreduce.*;		import org.apache.hadoop.mapreduce.*;
	import org.apache.hadoop.mapreduce.lib.allreduce.*;		import org.apache.hadoop.mapreduce.lib.allreduce.*;
Line 102:		Line 107:
	You can run the example locally using:		You can run the example locally using:
	wget --no-check-certificate 'https://wiki.ufal.ms.mff.cuni.cz/_export/code/courses:mapreduce-tutorial:step-31?codeblock=0' -O Sum.java		wget --no-check-certificate 'https://wiki.ufal.ms.mff.cuni.cz/_export/code/courses:mapreduce-tutorial:step-31?codeblock=0' -O Sum.java
-	make -f /net/projects/hadoop/java/Makefile Sum.java	+	make -f /net/projects/hadoop/java/Makefile Sum.jar
	rm -rf step-31-out; /net/projects/hadoop/bin/hadoop Sum.jar /net/projects/hadoop/examples/inputs/numbers-small step-31-out		rm -rf step-31-out; /net/projects/hadoop/bin/hadoop Sum.jar /net/projects/hadoop/examples/inputs/numbers-small step-31-out
	less step-31-out/part-*		less step-31-out/part-*
-	To run on a cluster with //C// machines using //C// mappers:	+	To run on a cluster using specified number of machines:
-	rm -rf step-31-out; /net/projects/hadoop/bin/hadoop Sum.jar -c C `/net/projects/hadoop/bin/compute-splitsize /net/projects/hadoop/examples/inputs/numbers-small C` /net/projects/hadoop/examples/inputs/numbers-small step-31-out	+	rm -rf step-31-out; M=#of_machines; INPUT=/net/projects/hadoop/examples/inputs/numbers-small; /net/projects/hadoop/bin/hadoop Sum.jar -c $M `/net/projects/hadoop/bin/compute-splitsize $INPUT $M` $INPUT step-31-out
	less step-31-out/part-*		less step-31-out/part-*
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	# NOW VIEW THE FILE		# NOW VIEW THE FILE
	# $EDITOR Statistics.java		# $EDITOR Statistics.java
-	make -f /net/projects/hadoop/java/Makefile Statistics.java	+	make -f /net/projects/hadoop/java/Makefile Statistics.jar
-	rm -rf step-31-out; /net/projects/hadoop/bin/hadoop Statistics.jar -c C `/net/projects/hadoop/bin/compute-splitsize /net/projects/hadoop/examples/inputs/numbers-small C` /net/projects/hadoop/examples/inputs/numbers-small step-31-out	+	rm -rf step-31-out; M=#of_machines; INPUT=/net/projects/hadoop/examples/inputs/numbers-small; /net/projects/hadoop/bin/hadoop Statistics.jar -c $M `/net/projects/hadoop/bin/compute-splitsize $INPUT $M` $INPUT step-31-out
	less step-31-out/part-*		less step-31-out/part-*
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	# NOW VIEW THE FILE		# NOW VIEW THE FILE
	# $EDITOR Median.java		# $EDITOR Median.java
-	make -f /net/projects/hadoop/java/Makefile Median.java	+	make -f /net/projects/hadoop/java/Makefile Median.jar
-	rm -rf step-31-out; /net/projects/hadoop/bin/hadoop Median.jar -c C `/net/projects/hadoop/bin/compute-splitsize /net/projects/hadoop/examples/inputs/numbers-small C` /net/projects/hadoop/examples/inputs/numbers-small step-31-out	+	rm -rf step-31-out; M=#of_machines; INPUT=/net/projects/hadoop/examples/inputs/numbers-small; /net/projects/hadoop/bin/hadoop Median.jar -c $M `/net/projects/hadoop/bin/compute-splitsize $INPUT $M` $INPUT step-31-out
	less step-31-out/part-*		less step-31-out/part-*
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	# NOW VIEW THE FILE		# NOW VIEW THE FILE
	# $EDITOR KMeans.java		# $EDITOR KMeans.java
-	make -f /net/projects/hadoop/java/Makefile KMeans.java	+	make -f /net/projects/hadoop/java/Makefile KMeans.jar
	You can run it using specified number of machines on the following input data:		You can run it using specified number of machines on the following input data:
	* ''/net/projects/hadoop/examples/inputs/points-small'':		* ''/net/projects/hadoop/examples/inputs/points-small'':
-	<code>M=machines; K=50; INPUT=/net/projects/hadoop/examples/inputs/points-small/points.txt	+	<code>M=#of_machines; K=50; INPUT=/net/projects/hadoop/examples/inputs/points-small/points.txt
-	rm -rf step-31-out; /net/projects/hadoop/bin/hadoop KMeans.jar -Dclusters.num=$K -Dclusters.file=$INPUT [-jt jobtracker | -c $M] `/net/projects/hadoop/bin/compute-splitsize $INPUT $M` $INPUT step-31-out</code>	+	rm -rf step-31-out; /net/projects/hadoop/bin/hadoop KMeans.jar -Dclusters.num=$K -Dclusters.file=$INPUT -c $M `/net/projects/hadoop/bin/compute-splitsize $INPUT $M` $INPUT step-31-out</code>
	* ''/net/projects/hadoop/examples/inputs/points-medium'':		* ''/net/projects/hadoop/examples/inputs/points-medium'':
-	<code>M=machines; K=100; INPUT=/net/projects/hadoop/examples/inputs/points-medium/points.txt	+	<code>M=#of_machines; K=100; INPUT=/net/projects/hadoop/examples/inputs/points-medium/points.txt
-	rm -rf step-31-out; /net/projects/hadoop/bin/hadoop KMeans.jar -Dclusters.num=$K -Dclusters.file=$INPUT [-jt jobtracker | -c $M] `/net/projects/hadoop/bin/compute-splitsize $INPUT $M` $INPUT step-31-out</code>	+	rm -rf step-31-out; /net/projects/hadoop/bin/hadoop KMeans.jar -Dclusters.num=$K -Dclusters.file=$INPUT -c $M `/net/projects/hadoop/bin/compute-splitsize $INPUT $M` $INPUT step-31-out</code>
	* ''/net/projects/hadoop/examples/inputs/points-large'':		* ''/net/projects/hadoop/examples/inputs/points-large'':
-	<code>M=machines; K=200; INPUT=/net/projects/hadoop/examples/inputs/points-large/points.txt	+	<code>M=#of_machines; K=200; INPUT=/net/projects/hadoop/examples/inputs/points-large/points.txt
-	rm -rf step-31-out; /net/projects/hadoop/bin/hadoop KMeans.jar -Dclusters.num=$K -Dclusters.file=$INPUT [-jt jobtracker | -c $M] `/net/projects/hadoop/bin/compute-splitsize $INPUT $M` $INPUT step-31-out</code>	+	rm -rf step-31-out; /net/projects/hadoop/bin/hadoop KMeans.jar -Dclusters.num=$K -Dclusters.file=$INPUT -c $M `/net/projects/hadoop/bin/compute-splitsize $INPUT $M` $INPUT step-31-out</code>
	Solution: {{:courses:mapreduce-tutorial:step-31-solution3.txt|KMeans.java}}.		Solution: {{:courses:mapreduce-tutorial:step-31-solution3.txt|KMeans.java}}.

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