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From Rajappa Iyer <...@mayin.org>
Subject Re: Job without Output files
Date Mon, 08 Nov 2010 15:29:26 GMT
Inserting multiple times is indeed OK.  Each new version of the cell will
get a new timestamp.

On Mon, Nov 8, 2010 at 4:47 AM, Jeff Zhang <zjffdu@gmail.com> wrote:

> 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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