Actually it's easier to use dynamic counters...
Sent from a remote device. Please excuse any typos...
Mike Segel
On Apr 20, 2012, at 11:36 AM, Amith D K <amit...@huawei.com> wrote:
> Yes U can use user defined counter as Jagat suggeted.
>
> Counter can be enum as Jagat described or any string which are called dynamic
> counters.
>
> It is easier to use Enum counter than dynamic counters, finally it depends on
> your use case :)
>
> Amith
> ________________________________________
> From: Jagat [jagatsi...@gmail.com]
> Sent: Saturday, April 21, 2012 12:25 AM
> To: common-user@hadoop.apache.org
> Subject: Re: Accessing global Counters
>
> Hi
>
> You can create your own counters like
>
> enum CountFruits {
> Apple,
> Mango,
> Banana
> }
>
>
> And in your mapper class when you see condition to increment , you can use
> Reporter incrCounter method to do the same.
>
> http://hadoop.apache.org/common/docs/current/api/org/apache/hadoop/mapred/Reporter.html#incrCounter(java.lang.Enum,%20long)
>
> e.g
> // I saw Apple increment it by one
> reporter.incrCounter(CountFruits.Apple,1);
>
> Now you can access them using job.getCounters
>
> http://hadoop.apache.org/common/docs/current/api/org/apache/hadoop/mapreduce/Job.html#getCounters()
>
> Hope this helps
>
> Regards,
>
> Jagat Singh
>
>
> On Fri, Apr 20, 2012 at 9:43 PM, Gayatri Rao <rgayat...@gmail.com> wrote:
>
>> Hi All,
>>
>> Is there a way for me to set global counters in Mapper and access them from
>> reducer?
>> Could you suggest how I can acheve this?
>>
>> Thanks
>> Gayatri
>>
>
