You are likely going to get more help from talking to the Mahout mailing list.
https://cwiki.apache.org/confluence/display/MAHOUT/Mailing+Lists,+IRC+and+Archives --Bobby Evans On 4/28/12 7:45 AM, "Lukáš Kryške" <lu...@hotmail.cz> wrote: Hello, I am successfully running K-Means clustering sample from the 'Mahout In Action' book (example in Chapter 7.3) in my Hadoop environment.Now I need to extend the program to take the vectors from a file located in my HDFS. I need to process clustering of millions or billions of vectors which are represented by comma-separated values in a .txt file in HDFS. Data are stored in this pattern: x1,y1x2,y2....xn,yn As I understood from the book, I need to transform my .txt file with vectors into Hadoop's SequenceFile first - how to do it most efficiently? And how to tell to the KMeansDriver that the input path contains SequenceFile with vectors? Thanks for help. _________________Best Regards,Lukas Kryske