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From "Sean Owen (JIRA)" <>
Subject [jira] [Commented] (MAHOUT-537) Bring DistributedRowMatrix into compliance with Hadoop 0.20.2
Date Sat, 21 May 2011 09:52:47 GMT


Sean Owen commented on MAHOUT-537:

I could, though honestly, I think the better solution at this point is to move to Hadoop 0.21
as part of the next release. It is the current release and nearly superseded by 0.22. It has
some features we need to move forward. It is closer to what many are using in CDH3/4. The
only drawback I see is that Amazon EMR is on 0.20.2. However we're releasing 0.5 now for 0.20.2.
And it is 6 months until we would put out a release needing 0.21, after which time I imagine
0.22 is out and EMR makes available 0.21 -- or if it doesn't, we have to leave behind support.

So let me open an item for that, and I suggest you can proceed using 0.21 features here.
(That is what I am doing for personal projects and it really simplified things. I'm on 0.22
now myself.)

> Bring DistributedRowMatrix into compliance with Hadoop 0.20.2
> -------------------------------------------------------------
>                 Key: MAHOUT-537
>                 URL:
>             Project: Mahout
>          Issue Type: Improvement
>          Components: Math
>    Affects Versions: 0.4, 0.5
>            Reporter: Shannon Quinn
>            Assignee: Shannon Quinn
>             Fix For: 0.6
>         Attachments: MAHOUT-537.patch, MAHOUT-537.patch, MAHOUT-537.patch, MAHOUT-537.patch
> Convert the current DistributedRowMatrix to use the newer Hadoop 0.20.2 API, in particular
eliminate dependence on the deprecated JobConf, using instead the separate Job and Configuration

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