Uses of Package
org.apache.hadoop.mapred
Packages that use org.apache.hadoop.mapred
Package
Description
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Classes in org.apache.hadoop.mapred used by org.apache.hadoop.mapredClassDescriptionStatus information on the current state of the Map-Reduce cluster.Class which encapsulates information about a blacklisted tasktracker.A set of named counters.A counter record, comprising its name and value.
Groupof counters, comprising of counters from a particular counterEnumclass.Used when target file already exists for any operation and is not configured to be overwritten.A base class for file-basedInputFormat.Deprecated.A base class forOutputFormat.Deprecated.A section of an input file.A general identifier, which internally stores the id as an integer.InputFormatdescribes the input-specification for a Map-Reduce job.InputSplitrepresents the data to be processed by an individualMapper.This exception is thrown when jobconf misses some mendatory attributes or value of some attributes is invalid.A map/reduce job configuration.That what may be configured.JobID represents the immutable and unique identifier for the job.Deprecated.Provided for compatibility.Used to describe the priority of the running job.Class that contains the information regarding the Job Queues which are maintained by the Hadoop Map/Reduce framework.Describes the current status of a job.Stateis no longer used since M/R 2.x.Maps input key/value pairs to a set of intermediate key/value pairs.Expert: Generic interface forMappers.OutputCommitterdescribes the commit of task output for a Map-Reduce job.OutputFormatdescribes the output-specification for a Map-Reduce job.Partitions the key space.RecordReaderreads <key, value> pairs from anInputSplit.RecordWriterwrites the output <key, value> pairs to an output file.Reduces a set of intermediate values which share a key to a smaller set of values.A facility for Map-Reduce applications to report progress and update counters, status information etc.RunningJobis the user-interface to query for details on a running Map-Reduce job.AnInputFormatforSequenceFiles.AnOutputFormatthat writesSequenceFiles.Deprecated.Provided for compatibility.TaskAttemptID represents the immutable and unique identifier for a task attempt.This is used to track task completion events on job tracker.TaskID represents the immutable and unique identifier for a Map or Reduce Task.A report on the state of a task. -
Classes in org.apache.hadoop.mapred used by org.apache.hadoop.mapred.jobcontrol
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Classes in org.apache.hadoop.mapred used by org.apache.hadoop.mapred.joinClassDescription
InputFormatdescribes the input-specification for a Map-Reduce job.InputSplitrepresents the data to be processed by an individualMapper.A map/reduce job configuration.RecordReaderreads <key, value> pairs from anInputSplit.A facility for Map-Reduce applications to report progress and update counters, status information etc. -
Classes in org.apache.hadoop.mapred used by org.apache.hadoop.mapred.libClassDescriptionA base class for file-based
InputFormat.A base class forOutputFormat.A section of an input file.InputFormatdescribes the input-specification for a Map-Reduce job.InputSplitrepresents the data to be processed by an individualMapper.A map/reduce job configuration.That what may be configured.Maps input key/value pairs to a set of intermediate key/value pairs.Expert: Generic interface forMappers.OutputFormatdescribes the output-specification for a Map-Reduce job.Partitions the key space.RecordReaderreads <key, value> pairs from anInputSplit.RecordWriterwrites the output <key, value> pairs to an output file.Reduces a set of intermediate values which share a key to a smaller set of values.A facility for Map-Reduce applications to report progress and update counters, status information etc. -
Classes in org.apache.hadoop.mapred used by org.apache.hadoop.mapred.lib.aggregateClassDescriptionA map/reduce job configuration.That what may be configured.Maps input key/value pairs to a set of intermediate key/value pairs.Reduces a set of intermediate values which share a key to a smaller set of values.A facility for Map-Reduce applications to report progress and update counters, status information etc.
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Classes in org.apache.hadoop.mapred used by org.apache.hadoop.mapred.lib.dbClassDescription
InputFormatdescribes the input-specification for a Map-Reduce job.InputSplitrepresents the data to be processed by an individualMapper.A map/reduce job configuration.That what may be configured.OutputFormatdescribes the output-specification for a Map-Reduce job.RecordReaderreads <key, value> pairs from anInputSplit.RecordWriterwrites the output <key, value> pairs to an output file.A facility for Map-Reduce applications to report progress and update counters, status information etc. -
Classes in org.apache.hadoop.mapred used by org.apache.hadoop.mapred.nativetask
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Classes in org.apache.hadoop.mapred used by org.apache.hadoop.mapred.pipesClassDescriptionA map/reduce job configuration.
RunningJobis the user-interface to query for details on a running Map-Reduce job. -
Classes in org.apache.hadoop.mapred used by org.apache.hadoop.mapreduceClassDescriptionA general identifier, which internally stores the id as an integer.This is used to track task completion events on job tracker.
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Classes in org.apache.hadoop.mapred used by org.apache.hadoop.mapreduce.lib.input
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Classes in org.apache.hadoop.mapred used by org.apache.hadoop.mapreduce.lib.outputClassDescriptionUsed when target file already exists for any operation and is not configured to be overwritten.
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Classes in org.apache.hadoop.mapred used by org.apache.hadoop.mapreduce.security