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From Niels Basjes <Ni...@basjes.nl>
Subject Re: Gzip progress during map phase.
Date Tue, 27 Dec 2011 11:42:08 GMT
Yes, this is what i was looking for.
Thanks

-- 
Met vriendelijke groet,
Niels Basjes
(Verstuurd vanaf mobiel )
Op 27 dec. 2011 12:08 schreef "Koji Noguchi" <knoguchi@yahoo-inc.com> het
volgende:

> Assuming you're using TextInputFormat, it sounds like
> https://issues.apache.org/jira/browse/MAPREDUCE-773
> In 0.21.  Don't know about CDH.
>
> Koji
>
>
> On 12/27/11 2:00 AM, "Niels Basjes" <Niels@basjes.nl> wrote:
>
> > I would not expect this. I would expect behaviour that is independent of
> > the way the splits are created.
> >
> > --
> > Met vriendelijke groet,
> > Niels Basjes
> > (Verstuurd vanaf mobiel )
> > Op 26 dec. 2011 07:57 schreef "Anthony Urso" <anthonyu@cs.ucla.edu> het
> > volgende:
> >
> >> Gzip files (unlike uncompressed files) are not splittable, which may be
> >> causing the behavior that you described.
> >> On Dec 24, 2011 6:24 AM, "Niels Basjes" <Niels@basjes.nl> wrote:
> >>
> >>> Hi,
> >>>
> >>> I noticed that the mapper progress indication in the hadoop cdh3
> >>> distribution jumps from 0% to 100% for each gzipped input file. So when
> >>> running with big gzipped input files the job appears to be stuck.
> >>>
> >>> I was unable to find a jira issue that describes this effect.
> >>> Before I dive into this I have a few questions to you guys:
> >>> 1) is this a known effect for the 0.20 version? If so what is the jira
> >>> issue?
> >>> 2) is this specific to gzip?
> >>> 3) is this effect still present in the MRv2/yarn version of Hadoop?
> >>>
> >>> Thanks.
> >>> --
> >>> Met vriendelijke groet,
> >>> Niels Basjes
> >>> (Verstuurd vanaf mobiel )
> >>>
> >>
>
>

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