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Class org.apache.hadoop.mapred.JobConf

Added Methods
boolean getCombineOnceOnly()  
void setCombineOnceOnly(boolean) If true, ensures the combiner is run once and only once on output from the map.
 

Changed Methods
CompressionType getMapOutputCompressionType() Now deprecated.
{@link CompressionType} is no longer valid for intermediate map-outputs.
Path getSystemDir() Now deprecated.
Use {@link JobClient#getSystemDir()} instead.
void setMapOutputCompressionType(CompressionType) Now deprecated.
{@link CompressionType} is no longer valid for intermediate map-outputs.