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Lecture Cloud- and Web-Technologies



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Map/Reduce - Information about Mr. Magic Sets in an optimized way

In this exercise you should optimize the solution of the previous exercise by only using one job for all - processing of the triple patterns and joining their results. This is a good example to show that many steps can be integrated in one job, but this may need careful design of the mapreduce program.


The following data of the file data.csv is given:


Please use the following editor for your exercise. You can run the content of the editor by clicking on the tab 'Run'...

Output of Editor Content

The result of running the editor content is as follows:

Output of the Solution

The output of the solution is as follows:


Please have a look at the solution only after you have finished working on your own solution. Otherwise the learn effect is much less.