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From "Jake Mannix (JIRA)" <j...@apache.org>
Subject [jira] Commented: (MAHOUT-205) Pull Writable (and anything else hadoop dependent) out of the matrix module
Date Wed, 06 Jan 2010 07:05:54 GMT

    [ https://issues.apache.org/jira/browse/MAHOUT-205?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12797016#action_12797016
] 

Jake Mannix commented on MAHOUT-205:
------------------------------------

It should be noted: the place the dependency went to is just mahout-core (where it was already).
 Serialization stuff seemed to belong in utils, but we have our dependencies running the other
way, so that's a no-go.

> Pull Writable (and anything else hadoop dependent) out of the matrix module
> ---------------------------------------------------------------------------
>
>                 Key: MAHOUT-205
>                 URL: https://issues.apache.org/jira/browse/MAHOUT-205
>             Project: Mahout
>          Issue Type: Improvement
>          Components: Math
>    Affects Versions: 0.1
>         Environment: all
>            Reporter: Jake Mannix
>            Assignee: Jake Mannix
>            Priority: Minor
>             Fix For: 0.3
>
>         Attachments: MAHOUT-205.patch, MAHOUT-205.patch
>
>
> Vector and Matrix extend Writable, and while that was merely poorly coupled before, it
will be an actual problem now that we have a separate submodule for matrix: this module should
not depend on hadoop at all, ideally.   Distributed matrix work, as well as simply Writable
wrappers can go somewhere else (where?  core?  yet another submodule which depends on matrix?),
but it would be really nice if we could produce an artifact which doesn't require Hadoop which
has our core linear primitives.

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