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Subject: Custom JoinRecordReader class
From: Chloe Guszo <chloe.guszo@gmail.com>
To: user@hadoop.apache.org
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Hi all,

I would like some help/direction on implementing a custom join class. I
believe this is the way to address my task at hand, which is given 2
matrices in SequenceFile format, I wish to run operations on all pairs of
rows between them. The rows may not be equal in number. The actual
operations will be taken care of in Mahout.

I wrote a custom class working off of InnerJoinRecordReader and
OuterJoinRecordReader but they of course always get fed and thus return
pairs of keys that match. How can I get a return of all key pairs? Or does
this go completely against the hadoop map-reduce framework?

Thanks in advance for any input.

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<div dir=3D"ltr">Hi all,<div><br></div><div>I would like some help/directio=
n on implementing a custom join class. I believe this is the way to address=
 my task at hand, which is given 2 matrices in SequenceFile format, I wish =
to run operations on all pairs of rows between them. The rows may not be eq=
ual in number. The actual operations will be taken care of in Mahout.=A0</d=
iv>
<div><br></div><div>I wrote a custom class working off of InnerJoinRecordRe=
ader and OuterJoinRecordReader but they of course always get fed and thus r=
eturn pairs of keys that match. How can I get a return of all key pairs? Or=
 does this go completely against the hadoop map-reduce framework?<br>
</div><div><br></div><div style>Thanks in advance for any input.</div></div=
>

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