org.apache.accumulo.examples.simple.mapreduce

Class TeraSortIngest

java.lang.Object

org.apache.hadoop.conf.Configured

org.apache.accumulo.examples.simple.mapreduce.TeraSortIngest

All Implemented Interfaces:

org.apache.hadoop.conf.Configurable, org.apache.hadoop.util.Tool

public class TeraSortIngest
extends org.apache.hadoop.conf.Configured
implements org.apache.hadoop.util.Tool

Generate the *almost* official terasort input data set. (See below) The user specifies the number of rows and the output directory and this class runs a map/reduce program to generate the data. The format of the data is:

• (10 bytes key) (10 bytes rowid) (78 bytes filler) \r \n
• The keys are random characters from the set ' ' .. '~'.
• The rowid is the right justified row id as a int.
• The filler consists of 7 runs of 10 characters from 'A' to 'Z'.

This TeraSort is slightly modified to allow for variable length key sizes and value sizes. The row length isn't variable. To generate a terabyte of data in the same way TeraSort does use 10000000000 rows and 10/10 byte key length and 78/78 byte value length. Along with the 10 byte row id and \r\n this gives you 100 byte row * 10000000000 rows = 1tb. Min/Max ranges for key and value parameters are inclusive/inclusive respectively.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	TeraSortIngest.SortGenMapper The Mapper class that given a row number, will generate the appropriate output line.

Constructor Summary

Constructors

Constructor and Description
TeraSortIngest()

Method Summary

Methods

Modifier and Type	Method and Description
static void	main(String[] args)
int	run(String[] args)

Methods inherited from class org.apache.hadoop.conf.Configured

getConf, setConf

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.apache.hadoop.conf.Configurable

getConf, setConf

Constructor Detail

TeraSortIngest

public TeraSortIngest()

Method Detail

main

public static void main(String[] args)
                 throws Exception

Throws:

Exception

run

public int run(String[] args)
        throws Exception

Specified by:

run in interface org.apache.hadoop.util.Tool

Throws:

Exception