Mailing-List: contact user-help@hadoop.apache.org; run by ezmlm
Precedence: bulk
Reply-To: user@hadoop.apache.org
Received-SPF: pass (athena.apache.org: domain of yuri.rwx@gmail.com designates
 209.85.216.176 as permitted sender)
MIME-Version: 1.0
In-Reply-To: 
 <CAMVC6RPW8pY_1Ck=bRn-Kxqbpq2T=G4CZzwA4nVn1m+u4zJg4w@mail.gmail.com>
References: 
 <CACH8ih_Ztn3Z1zskg9gEvOnzOt9_sZHnv_6r-J2c13=nmWBRdA@mail.gmail.com>
	<CAMVC6RPW8pY_1Ck=bRn-Kxqbpq2T=G4CZzwA4nVn1m+u4zJg4w@mail.gmail.com>
Date: Mon, 3 Sep 2012 17:08:06 +0200
Message-ID: 
 <CACH8ih-+eW31uwrK6w9w_xcAEWSgOTvbgVg0qAzNL8=-R0Uz6Q@mail.gmail.com>
Subject: Re: reading a binary file
From: Francesco Silvestri <yuri.rwx@gmail.com>
To: user@hadoop.apache.org
Content-Type: multipart/alternative; boundary=00248c7691464f27d104c8cd82c2

--00248c7691464f27d104c8cd82c2
Content-Type: text/plain; charset=ISO-8859-1

Hi Mohammad,

SequenceFileInputFormat<http://hadoop.apache.org/mapreduce/docs/r0.21.0/api/org/apache/hadoop/mapreduce/lib/input/SequenceFileInputFormat.html>
requires
the file to be a sequence of key/value stored in binary (i.e., the key is
stored in the file). In my case, the key is implicitly given by the
position of the value within the file.

Thank you,
Francesco


On Mon, Sep 3, 2012 at 5:01 PM, Mohammad Tariq <dontariq@gmail.com> wrote:

> Hello Francesco,
>
>         Have a look at SequenceFileInputFormat :
> http://hadoop.apache.org/mapreduce/docs/r0.21.0/api/org/apache/hadoop/mapreduce/lib/input/SequenceFileInputFormat.html
>
> Regards,
>     Mohammad Tariq
>
>
>
> On Mon, Sep 3, 2012 at 8:26 PM, Francesco Silvestri <yuri.rwx@gmail.com>wrote:
>
>> Hello,
>>
>> I have a binary file of integers and I would like an input format that
>> generates pairs <key,value>, where value is an integer in the file and key
>> the position of the integer in the file. Which class should I use? (i.e.
>> I'm looking for a kind of TextinputFormat for binary files)
>>
>> Thank you for your consideration,
>>
>> Francesco
>>
>
>

--00248c7691464f27d104c8cd82c2
Content-Type: text/html; charset=ISO-8859-1
Content-Transfer-Encoding: quoted-printable

Hi=A0<span style=3D"color:rgb(34,34,34);font-size:12.499999046325684px;font=
-family:arial,sans-serif">Mohammad,</span><div><font color=3D"#222222" face=
=3D"arial, sans-serif"><span style=3D"font-size:12.499999046325684px"><br><=
/span></font></div>
<div><a href=3D"http://hadoop.apache.org/mapreduce/docs/r0.21.0/api/org/apa=
che/hadoop/mapreduce/lib/input/SequenceFileInputFormat.html" target=3D"_bla=
nk">SequenceFileInputFormat</a>=A0requires the file to be a sequence of key=
/value stored in binary (i.e., the key is stored in the file). In my case, =
the key is implicitly given by the position of the value within the file.</=
div>
<div><br></div><div>Thank you,</div><div>Francesco</div><div><div><font col=
or=3D"#222222" face=3D"arial, sans-serif"><span style=3D"font-size:12.49999=
9046325684px"><br>
</span></font></div><div><font color=3D"#222222" face=3D"arial, sans-serif"=
><span style=3D"font-size:12.499999046325684px"><br></span></font><br><div =
class=3D"gmail_quote">On Mon, Sep 3, 2012 at 5:01 PM, Mohammad Tariq <span =
dir=3D"ltr">&lt;<a href=3D"mailto:dontariq@gmail.com" target=3D"_blank">don=
tariq@gmail.com</a>&gt;</span> wrote:<br>

<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex">Hello=A0Francesco,<div><br><div>=A0 =A0 =A0 =
=A0 Have a look at SequenceFileInputFormat :=A0<a href=3D"http://hadoop.apa=
che.org/mapreduce/docs/r0.21.0/api/org/apache/hadoop/mapreduce/lib/input/Se=
quenceFileInputFormat.html" target=3D"_blank">http://hadoop.apache.org/mapr=
educe/docs/r0.21.0/api/org/apache/hadoop/mapreduce/lib/input/SequenceFileIn=
putFormat.html</a></div>


<div><br></div><div>Regards,<div>=A0=A0 =A0Mohammad Tariq</div><div><div><b=
r>
<br><br><div class=3D"gmail_quote">On Mon, Sep 3, 2012 at 8:26 PM, Francesc=
o Silvestri <span dir=3D"ltr">&lt;<a href=3D"mailto:yuri.rwx@gmail.com" tar=
get=3D"_blank">yuri.rwx@gmail.com</a>&gt;</span> wrote:<br><blockquote clas=
s=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;pad=
ding-left:1ex">


Hello,<div><br></div><div>I have a binary file of integers and I would like=
 an input format that generates pairs &lt;key,value&gt;, where value is an =
integer in the file and key the position of the integer in the file. Which =
class should I use? (i.e. I&#39;m looking for a kind of TextinputFormat for=
 binary files)</div>


<div><br></div><div>Thank you for your consideration,</div><div><br></div><=
div>Francesco</div>
</blockquote></div><br></div></div></div></div>
</blockquote></div><br></div>
</div>

--00248c7691464f27d104c8cd82c2--