I am new to MapReduce. I have a doubt. Does the setup & cleanup methods are executed after each map & reduce task.
Setup & cleanup methods are executed after each task, as task are executed on separate machines. If a method throws an exception, it will be skipped for that particular task.
A Zero reducer as the name suggests ...READ MORE
Differences are as follows:
Hadoop's MR can be ...READ MORE
Doc on Hadoop Streaming : http://hadoop.apache.org/docs/r1.2.1/streaming.html
Hadoop streaming is ...READ MORE
Writable in an interface in Hadoop and types ...READ MORE
Firstly you need to understand the concept ...READ MORE
You can create one directory in HDFS ...READ MORE
In your case there is no difference ...READ MORE
The distributed copy command, distcp, is a ...READ MORE
mr-jobhistory-daemon. sh start historyserver READ MORE
HDFS is a distributed file system whereas ...READ MORE
Already have an account? Sign in.