In this chapter, we discussed clustering. We discussed clustering in general, as well as the different applications of clustering. We further discussed the different distance measuring techniques available. We then saw the different clustering techniques and algorithms available in Apache Mahout. We also saw how to install Mahout on the system and how to prepare a development environment to execute Mahout algorithms. We also discussed how to prepare data using Mahout's clustering algorithms.

Now, we will move on to the next chapter, where we will see one of the best known clustering algorithms—K-means. You will learn about the algorithm and understand how to use the Mahout implementation of this algorithm.