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Date: Mon, 09 Jan 2012 23:33:41 +0100
From: Christopher Dorner <christopher.dorner@gmail.com>
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Subject: Re: information, whether a GET Request inside Map-Task is data local
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Thank you for the reply.
Though that sounds a bit like some dirty hacking, it seems to be doable. 
I think i will give it a try.
I can report back when i get some usable results. Maybe some more people 
are interested in that.

Christopher


Am 09.01.2012 23:15, schrieb Jean-Daniel Cryans:
> Short answer: no.
>
> Painful way to get around the problem:
>
> You *could* by looking up the machines hostname when the job starts
> and then from the HConnection that HTables can give you through
> getConnection() do getRegionLocation for the row you are going to Get
> and then get the hostname by getServerAddress().getHostname()
>
> J-D
>
> On Mon, Jan 9, 2012 at 1:19 PM, Christopher Dorner
> <christopher.dorner@gmail.com>  wrote:
>> Hi,
>>
>> i am using the input of a mapper as a rowkey to make a GET Request to a
>> table.
>>
>> Is it somehow possible to retrieve information about how much data had to be
>> transferred over network or how many of the requests were data local
>> (namenodes are also regionservers) or where the request was not on the same
>> node?
>>
>> That would be some really cool and useful statistics for us :)
>>
>> Thank you,
>>
>> Christopher Dorner