类 org.apache.hadoop.mapreduce.Counters
的使用

使用Counters的程序包

程序包	说明
org.apache.hadoop.mapreduce
org.apache.hadoop.tools.rumen	Rumen is a data extraction and analysis tool built for Apache Hadoop.

org.apache.hadoop.mapreduce中Counters的使用

返回Counters的org.apache.hadoop.mapreduce中的方法

限定符和类型	方法和说明
Counters	Job.getCounters() Gets the counters for this job.

参数类型为Counters的org.apache.hadoop.mapreduce中的方法

限定符和类型	方法和说明
void	Counters.incrAllCounters(Counters other) Increments multiple counters by their amounts in another Counters instance.

org.apache.hadoop.tools.rumen中Counters的使用

返回Counters的org.apache.hadoop.tools.rumen中的方法

限定符和类型	方法和说明
Counters	JobFinishedEvent.getMapCounters() Get the Map counters for the job
Counters	JobFinishedEvent.getReduceCounters() Get the reduce counters for the job
Counters	JobFinishedEvent.getTotalCounters() Get the counters for the job

参数类型为Counters的org.apache.hadoop.tools.rumen中的构造器

构造器和说明
JobFinishedEvent(JobID id, long finishTime, int finishedMaps, int finishedReduces, int failedMaps, int failedReduces, Counters mapCounters, Counters reduceCounters, Counters totalCounters) Create an event to record successful job completion
MapAttemptFinishedEvent(TaskAttemptID id, TaskType taskType, String taskStatus, long mapFinishTime, long finishTime, String hostname, String state, Counters counters) Create an event for successful completion of map attempts
ReduceAttemptFinishedEvent(TaskAttemptID id, TaskType taskType, String taskStatus, long shuffleFinishTime, long sortFinishTime, long finishTime, String hostname, String state, Counters counters) Create an event to record completion of a reduce attempt
TaskAttemptFinishedEvent(TaskAttemptID id, TaskType taskType, String taskStatus, long finishTime, String hostname, String state, Counters counters) Create an event to record successful finishes for setup and cleanup attempts
TaskFinishedEvent(TaskID id, long finishTime, TaskType taskType, String status, Counters counters) Create an event to record the successful completion of a task