Uses of Class
org.apache.hadoop.io.WritableComparator

Packages that use WritableComparator
org.apache.hadoop.io Generic i/o code for use when reading and writing data to the network, to databases, and to files. 
org.apache.hadoop.mapred A system for scalable, fault-tolerant, distributed computation over large data collections. 
 

Uses of WritableComparator in org.apache.hadoop.io
 

Subclasses of WritableComparator in org.apache.hadoop.io
static class BooleanWritable.Comparator
          A Comparator optimized for BooleanWritable.
static class BytesWritable.Comparator
          A Comparator optimized for BytesWritable.
static class FloatWritable.Comparator
          A Comparator optimized for FloatWritable.
static class IntWritable.Comparator
          A Comparator optimized for IntWritable.
static class LongWritable.Comparator
          A Comparator optimized for LongWritable.
static class LongWritable.DecreasingComparator
          A decreasing Comparator optimized for LongWritable.
static class MD5Hash.Comparator
          A WritableComparator optimized for MD5Hash keys.
static class UTF8.Comparator
          A WritableComparator optimized for UTF8 keys.
 

Methods in org.apache.hadoop.io that return WritableComparator
static WritableComparator WritableComparator.get(Class c)
          Get a comparator for a WritableComparable implementation.
 

Methods in org.apache.hadoop.io with parameters of type WritableComparator
static void WritableComparator.define(Class c, WritableComparator comparator)
          Register an optimized comparator for a WritableComparable implementation.
 

Constructors in org.apache.hadoop.io with parameters of type WritableComparator
MapFile.Reader(FileSystem fs, String dirName, WritableComparator comparator, Configuration conf)
          Construct a map reader for the named map using the named comparator.
MapFile.Writer(FileSystem fs, String dirName, WritableComparator comparator, Class valClass)
          Create the named map using the named key comparator.
MapFile.Writer(FileSystem fs, String dirName, WritableComparator comparator, Class valClass, boolean compress)
          Create the named map using the named key comparator.
SequenceFile.Sorter(FileSystem fs, WritableComparator comparator, Class valClass, Configuration conf)
          Sort and merge using an arbitrary WritableComparator.
SetFile.Reader(FileSystem fs, String dirName, WritableComparator comparator, Configuration conf)
          Construct a set reader for the named set using the named comparator.
SetFile.Writer(FileSystem fs, String dirName, WritableComparator comparator)
          Create the named set using the named key comparator.
 

Uses of WritableComparator in org.apache.hadoop.mapred
 

Methods in org.apache.hadoop.mapred that return WritableComparator
 WritableComparator JobConf.getOutputKeyComparator()
           
 



Copyright © 2006 The Apache Software Foundation