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Removed Classes and Interfaces | |
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Persists and retrieves the Job info of a job into/from DFS. |
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Protocol that a JobClient and the central JobTracker use to communicate. |
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Added Classes | |
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A general identifier, which internally stores the id as an integer. |
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JobID represents the immutable and unique identifier for the job. |
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An OutputFormat that writes keys, values to SequenceFiles in binary(raw) format |
WritableValueBytes |
Inner class used for appendRaw |
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TaskAttemptID represents the immutable and unique identifier for a task attempt. |
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TaskID represents the immutable and unique identifier for a Map or Reduce Task. |
Changed Classes and Interfaces | |
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A set of named counters. |
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A counter record, comprising its name and value. |
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Group of counters, comprising of counters from a particular
counter Enum class. |
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A base class for file-based InputFormat. |
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A base class for OutputFormat. |
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InputFormat describes the input-specification for a
Map-Reduce job. |
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JobClient is the primary interface for the user-job to interact
with the JobTracker. |
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A map/reduce job configuration. |
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Provides methods for writing to and reading from job history. |
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Helper class for logging or reading back events related to job start, finish or failure. |
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Helper class for logging or reading back events related to start, finish or failure of a Map Attempt on a node. |
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Helper class for logging or reading back events related to start, finish or failure of a Map Attempt on a node. |
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Helper class for logging or reading back events related to Task's start, finish or failure. |
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A JobProfile is a MapReduce primitive. |
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Provide command line parsing for JobSubmission
job submission looks like
hadoop jar -libjars |
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Describes the current status of a job. |
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JobTracker is the central location for submitting and tracking MR jobs in a network environment. |
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Treats keys as offset in file and value as line. |
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A class that provides a line reader from an input stream. |
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A facility for Map-Reduce applications to report progress and update counters, status information etc. |
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RunningJob is the user-interface to query for details on a
running Map-Reduce job. |
Filter |
filter interface |
MD5Filter |
This class returns a set of records by examing the MD5 digest of its key against a filtering frequency f. |
PercentFilter |
This class returns a percentage of records The percentage is determined by a filtering frequency f using the criteria record# % f == 0. |
RegexFilter |
Records filter by matching key to regex |
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An OutputFormat that writes SequenceFiles. |
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An RecordReader for SequenceFiles. |
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This is used to track task completion events on job tracker. |
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A simple logger to handle the task-specific user logs. |
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A report on the state of a task. |
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TaskTracker is a process that starts and tracks MR Tasks in a networked environment. |
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