How would you tackle calculating the number of unique visitors for each hour by mining a huge apache log? You can use post processing on the output of the mapreduce job.
385If reducers do not start before all mappers finish then why does the progress on mapreduce job shows something like map(50%) reduce(10%)? Why reducers progress percentage is displayed when mapper is not finished yet?
456How will you submit extra files or data ( like jars, static files, etc. ) For a mapreduce job during runtime?
425
What MapReduce framework consists of?
Can we submit the mapreduce job from slave node?
What is a IdentityMapper and IdentityReducer in MapReduce ?
Explain Working of MapReduce?
Write a Mapreduce Program for Character Count ?
how to proceed to write your first mapreducer program?
Developing a MapReduce Application?
Different ways of debugging a job in MapReduce?
What are combiners? When should I use a combiner in my MapReduce Job?
How does MapReduce framework view its input internally?
What are the steps involved in MapReduce framework?
What is the Job interface in MapReduce framework?
How to overwrite an existing output file during execution of mapreduce jobs?
What is the core of the job in MapReduce framework?
How Pig differs from MapReduce?