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Specify Global Configuration Items in mapred-site.xml
The following provides the configuration items of APIs in the mapred-site.xml file.
setMapperClass(Class <extends Mapper> cls) -> "mapreduce.job.map.class"
setReducerClass(Class<extends Reducer> cls) -> "mapreduce.job.reduce.class"
setCombinerClass(Class<extends Reducer> cls) -> "mapreduce.job.combine.class"
setInputFormatClass(Class<extends InputFormat> cls) -> "mapreduce.job.inputformat.class"
setJar(String jar) -> "mapreduce.job.jar"
setOutputFormat(Class< extends OutputFormat> theClass) -> "mapred.output.format.class"
setOutputKeyClass(Class<> theClass) -> "mapreduce.job.output.key.class"
setOutputValueClass(Class<> theClass) -> "mapreduce.job.output.value.class"
setPartitionerClass(Class<extends Partitioner> theClass) -> "mapred.partitioner.class"
setMapOutputCompressorClass(Class<extends CompressionCodec> codecClass)
-> "mapreduce.map.output.compress" & "mapreduce.map.output.compress.codec"
setJobPriority(JobPriority prio) -> "mapreduce.job.priority"
setQueueName(String queueName) -> "mapreduce.job.queuename"
setNumMapTasks(int n) -> "mapreduce.job.maps"
setNumReduceTasks(int n) -> "mapreduce.job.reduces"
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