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Package org.apache.hadoop.mapred

Removed Classes and Interfaces
CompletedJobStatusStore Persists and retrieves the Job info of a job into/from DFS.
JobSubmissionProtocol Protocol that a JobClient and the central JobTracker use to communicate.
MapTaskStatus  
ReduceTaskStatus  
TaskLog.Reader  
 

Added Classes
ID A general identifier, which internally stores the id as an integer.
JobID JobID represents the immutable and unique identifier for the job.
SequenceFileAsBinaryOutputFormat An OutputFormat that writes keys, values to SequenceFiles in binary(raw) format
SequenceFileAsBinaryOutputFormat.
WritableValueBytes
Inner class used for appendRaw
TaskAttemptID TaskAttemptID represents the immutable and unique identifier for a task attempt.
TaskID TaskID represents the immutable and unique identifier for a Map or Reduce Task.
 

Changed Classes and Interfaces
Counters A set of named counters.
Counters.Counter A counter record, comprising its name and value.
Counters.Group Group of counters, comprising of counters from a particular counter Enum class.
FileInputFormat A base class for file-based InputFormat.
FileOutputFormat A base class for OutputFormat.
InputFormat InputFormat describes the input-specification for a Map-Reduce job.
JobClient JobClient is the primary interface for the user-job to interact with the JobTracker.
JobConf A map/reduce job configuration.
JobHistory Provides methods for writing to and reading from job history.
JobHistory.JobInfo Helper class for logging or reading back events related to job start, finish or failure.
JobHistory.MapAttempt Helper class for logging or reading back events related to start, finish or failure of a Map Attempt on a node.
JobHistory.ReduceAttempt Helper class for logging or reading back events related to start, finish or failure of a Map Attempt on a node.
JobHistory.Task Helper class for logging or reading back events related to Task's start, finish or failure.
JobProfile A JobProfile is a MapReduce primitive.
JobShell Provide command line parsing for JobSubmission job submission looks like hadoop jar -libjars -archives -files inputjar args
JobStatus Describes the current status of a job.
JobTracker JobTracker is the central location for submitting and tracking MR jobs in a network environment.
LineRecordReader Treats keys as offset in file and value as line.
LineRecordReader.LineReader A class that provides a line reader from an input stream.
Reporter A facility for Map-Reduce applications to report progress and update counters, status information etc.
RunningJob RunningJob is the user-interface to query for details on a running Map-Reduce job.
SequenceFileInputFilter.
Filter
filter interface
SequenceFileInputFilter.
MD5Filter
This class returns a set of records by examing the MD5 digest of its key against a filtering frequency f.
SequenceFileInputFilter.
PercentFilter
This class returns a percentage of records The percentage is determined by a filtering frequency f using the criteria record# % f == 0.
SequenceFileInputFilter.
RegexFilter
Records filter by matching key to regex
SequenceFileOutputFormat An OutputFormat that writes SequenceFiles.
SequenceFileRecordReader An RecordReader for SequenceFiles.
TaskCompletionEvent This is used to track task completion events on job tracker.
TaskLog A simple logger to handle the task-specific user logs.
TaskReport A report on the state of a task.
TaskTracker TaskTracker is a process that starts and tracks MR Tasks in a networked environment.
TextOutputFormat.LineRecordWriter