dimalabs / scalable-datamining-class Goto Github PK

Hi,

Following the slides /course/slides/exercises/SetupforAssignmentsandProject.pdf the URL to the Stratosphere documentation, provided in the last slide, reach an error 404 page.

http://www.stratosphere.eu/projects/Stratosphere/wiki/GettingStarted

Hi,

I am trying to implement the secondary sort for the last exercise, but in the mapper I get only book tuples, not the authors. From what I understood, I should get both of them, like in the basic exercise, but emit them in a specific way using the available classes. Did I misunderstood something?

Hi,

Following the readme and after having cloned the repo, running the Maven command to compile the project fail because of 2 dependencies:

• eu.stratosphere:pact-common:jar:0.1.2
• eu.stratosphere:pact-clients:jar:0.1.2

I tried to add them manually by downloading stratosphere, compiling it (everything went well) and using the jars built there (v0.4) but it did not work (wrong version?).

How to fix it?

Hi,

I was looking for information about how to "emit" the (key,value) in the map/reduce functions to implement. Looking at the context object, I found the write method, but still it seems to work in the map function (the reduce function get what I have written in map) the test case still get a null value instead of the sum I have identified. Is the write function not the one to use in reduce? I did not see any doc about these details, so I do not know how to go further.