- All Implemented Interfaces:
- Configurable, Tool
public class RandomWriter
- extends Configured
- implements Tool
This program uses map/reduce to just run a distributed job where there is
no interaction between the tasks and each task write a large unsorted
random binary sequence file of BytesWritable.
In order for this program to generate data for terasort with 10-byte keys
and 90-byte values, have the following config:
RandomWriter also supports all the above options
and ones supported by
GenericOptionsParser via the command-line.
This is the main routine for launching a distributed random write job.
|Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
public int run(String args)
- This is the main routine for launching a distributed random write job.
It runs 10 maps/node and each node writes 1 gig of data to a DFS file.
The reduce doesn't do anything.
- Specified by:
run in interface
args - command specific arguments.
- exit code.
public static void main(String args)
Copyright © 2009 The Apache Software Foundation