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Message-ID: <6a8ad9cf0807211455v55527f88t4647c50ab11a40cd@mail.gmail.com>
Date: Mon, 21 Jul 2008 22:55:14 +0100
From: "Daniel Yu" <d4nielfree@gmail.com>
To: core-user@hadoop.apache.org
Subject: question about Counters
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hi,
  i defined a counter of my own, and updated it in map method,

protected static enum MyCounter {
        INPUT_WORDS
    };
...
public void map(...) {
  ...
    reporter.incrCounter(MyCounter.INPUT_WORDS, 1);
}

and can i fetch the counts later? like in the  run() method after the job is
finished,
coz i want to store it as a parameter file for later MR jobs.

looks like the framework will use Counters.getCounter(enum key) to return a
certain count,
which can be seen when the JobClient tries to run a job, but in my
application(outside the
job running) how can i get the Counters object? my guess is its maintained
by the framework,
so user doesnt need to create Counters object in the application.

Thanks.

Daniel

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