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Both sides previous revision Previous revision 2012/01/31 09:39 straka Change Perl commandline syntax.2012/01/30 16:45 dusek 2012/01/30 10:30 majlis 2012/01/30 10:30 majlis 2012/01/28 23:04 majlis Added links to previous and next chapter.2012/01/28 23:01 majlis Fixed typos2012/01/28 22:53 majlis Commands for execution were added.2012/01/28 22:34 majlis 2012/01/28 22:31 majlis 2012/01/28 12:32 majlis 2012/01/28 12:24 majlis 2012/01/25 22:14 straka 2012/01/25 21:10 straka 2012/01/25 21:09 straka 2012/01/25 21:08 straka 2012/01/25 21:06 straka 2012/01/25 20:58 straka 2012/01/25 20:57 straka 2012/01/25 20:55 straka 2012/01/25 20:54 straka 2012/01/25 20:53 straka 2012/01/25 20:44 straka 2012/01/25 19:38 straka 2012/01/25 19:38 straka 2012/01/25 19:37 straka 2012/01/25 19:33 straka 2012/01/25 19:09 straka 2012/01/25 15:46 straka vytvořeno Go		2012/01/31 09:39 straka Change Perl commandline syntax.2012/01/30 16:45 dusek 2012/01/30 10:30 majlis 2012/01/30 10:30 majlis 2012/01/28 23:04 majlis Added links to previous and next chapter.2012/01/28 23:01 majlis Fixed typos2012/01/28 22:53 majlis Commands for execution were added.2012/01/28 22:34 majlis 2012/01/28 22:31 majlis 2012/01/28 12:32 majlis 2012/01/28 12:24 majlis 2012/01/25 22:14 straka 2012/01/25 21:10 straka 2012/01/25 21:09 straka 2012/01/25 21:08 straka 2012/01/25 21:06 straka 2012/01/25 20:58 straka 2012/01/25 20:57 straka 2012/01/25 20:55 straka 2012/01/25 20:54 straka 2012/01/25 20:53 straka 2012/01/25 20:44 straka 2012/01/25 19:38 straka 2012/01/25 19:38 straka 2012/01/25 19:37 straka 2012/01/25 19:33 straka 2012/01/25 19:09 straka 2012/01/25 15:46 straka vytvořeno Go Next revision Both sides next revision
courses:mapreduce-tutorial:step-11 [2012/01/28 12:32] majlis		courses:mapreduce-tutorial:step-11 [2012/01/28 22:31] majlis
Line 15:		Line 15:
	===== Exercise =====		===== Exercise =====
-	Improve the {{:courses:mapreduce-tutorial:TODOstep-5-solution1.txt|TODOwc-without-combiner.pl}} script by manually combining the results in the Mapper -- create a hash of word occurrences, populate it during the ''map'' calls without outputting results and finally output all (key, value) pairs in the ''cleanup'' method.	+	Improve the {{:courses:mapreduce-tutorial:step-5-solution1.txt|wc-without-combiner.pl}} script by manually combining the results in the Mapper -- create a hash of word occurrences, populate it during the ''map'' calls without outputting results and finally output all (key, value) pairs in the ''cleanup'' method.
	Measure the improvement.		Measure the improvement.
-	{{:courses:mapreduce-tutorial:step-11-solution.txt|Solution.pl}}	+
	===== Combiners and Perl API performance =====		===== Combiners and Perl API performance =====
Line 27:		Line 27:
	This is even more obvious with larger input data:		This is even more obvious with larger input data:
	^ Script ^ Time to complete on ''/home/straka/wiki/cs-text'' ^		^ Script ^ Time to complete on ''/home/straka/wiki/cs-text'' ^
-	| {{:courses:mapreduce-tutorial:TODOstep-5-solution1.txt|TODOwc-without-combiner.pl}} | 5mins, 4sec |	+	| {{:courses:mapreduce-tutorial:step-5-solution1.txt|wc-without-combiner.pl}} | 5mins, 4sec |
	| {{:courses:mapreduce-tutorial:step-10.txt|wc-with-combiner.pl}} | 5mins, 33sec |		| {{:courses:mapreduce-tutorial:step-10.txt|wc-with-combiner.pl}} | 5mins, 33sec |
	| {{:courses:mapreduce-tutorial:step-11-solution.txt|wc-with-perl-hash.pl}} | 2mins, 24sec |		| {{:courses:mapreduce-tutorial:step-11-solution.txt|wc-with-perl-hash.pl}} | 2mins, 24sec |
		+
	For comparison, here are times of Java solutions:		For comparison, here are times of Java solutions:

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