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Posted to common-user@hadoop.apache.org by Saptarshi Guha <sa...@gmail.com> on 2010/10/26 08:35:23 UTC
MultipleOutputFormat and MultipleOutputs - which will last?
Hello,
I notice in 0.21 there is org.apache.hadoop.mapreduce.lib.output
MultipleOutputs and in
0.20.1 there is org.apache.hadoop.mapred.lib MultipleOutputFormat .
Going forward, will the latter be deprecated? Which is better to use?
I prefer the latter but
since it isn't in o.a.h.mapreduce i'm wary it might be discontinued.
Regard
Saptarshi
Re: MultipleOutputFormat and MultipleOutputs - which will last?
Posted by Saptarshi Guha <sa...@gmail.com>.
I prefer the latter(MultipleOutputFormat) as I would not have had to
change my code.
Everything would have stayed in the outputformat. And I hardly need
the extra features.
Oh well, got to keep with the times.
Cheers
Saptarshi
On Tue, Oct 26, 2010 at 2:44 AM, Rekha Joshi <re...@yahoo-inc.com> wrote:
> Hi Saptarshi,
>
> AFAIK, this is an intermediate stage where the old api is supported, while
> evolving the new api.
> In 0.21, the old api - MultipleOutputFormat is not deprecated.
> http://hadoop.apache.org/mapreduce/docs/r0.21.0/api/index.html.In future it
> might be.
>
> From usage perspective, what MultipleOutputs allows is not possible via
> MultipleOutputFormat.With MultipleOutputs in map one can have reduce phase,
> can have different formats of output..
> So what you need should be the deciding factor. And ofcourse, a wary user is
> a smart user!
>
> Thanks & Regards,
> /Rekha.
>
> On 10/26/10 12:05 PM, "Saptarshi Guha" <sa...@gmail.com> wrote:
>
> Hello,
>
> I notice in 0.21 there is org.apache.hadoop.mapreduce.lib.output
> MultipleOutputs and in
> 0.20.1 there is org.apache.hadoop.mapred.lib MultipleOutputFormat .
>
> Going forward, will the latter be deprecated? Which is better to use?
> I prefer the latter but
> since it isn't in o.a.h.mapreduce i'm wary it might be discontinued.
>
>
> Regard
> Saptarshi
>
>
Re: MultipleOutputFormat and MultipleOutputs - which will last?
Posted by Rekha Joshi <re...@yahoo-inc.com>.
Hi Saptarshi,
AFAIK, this is an intermediate stage where the old api is supported, while evolving the new api.
In 0.21, the old api - MultipleOutputFormat is not deprecated. http://hadoop.apache.org/mapreduce/docs/r0.21.0/api/index.html.In future it might be.
>From usage perspective, what MultipleOutputs allows is not possible via MultipleOutputFormat.With MultipleOutputs in map one can have reduce phase, can have different formats of output..
So what you need should be the deciding factor. And ofcourse, a wary user is a smart user!
Thanks & Regards,
/Rekha.
On 10/26/10 12:05 PM, "Saptarshi Guha" <sa...@gmail.com> wrote:
Hello,
I notice in 0.21 there is org.apache.hadoop.mapreduce.lib.output
MultipleOutputs and in
0.20.1 there is org.apache.hadoop.mapred.lib MultipleOutputFormat .
Going forward, will the latter be deprecated? Which is better to use?
I prefer the latter but
since it isn't in o.a.h.mapreduce i'm wary it might be discontinued.
Regard
Saptarshi