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From Jeff Zhang <zjf...@gmail.com>
Subject Re: Job without Output files
Date Mon, 08 Nov 2010 12:47:28 GMT
My guess is that HBase has version on cells, so inserting
multiple-times is OK, not sure my guessing is correct


On Mon, Nov 8, 2010 at 8:32 PM, Harsh J <qwertymaniac@gmail.com> wrote:
> Hi Jeff,
>
> On Mon, Nov 8, 2010 at 3:17 PM, Jeff Zhang <zjffdu@gmail.com> wrote:
>> Hi Harsh,
>>
>> you point is interesting, then how hbase (TableOutputFormat) handle
>> speculative execution ? which part of code doing this ?
>>
>
> I was under the impression that they do something to avoid speculative
> execution induced issues. Guess they don't, and probably suggest
> turning off speculative features off. I might be wrong, but I don't
> see them utilizing the ${mapred.output.dir} directory for any writes,
> so they don't at all handle this?
>
> --
> Harsh J
> www.harshj.com
>



-- 
Best Regards

Jeff Zhang

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