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https://issues.apache.org/jira/browse/MAHOUT-944?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13210384#comment-13210384
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Frank Scholten commented on MAHOUT-944:
---------------------------------------
Good feedback guys.
My current priority is an MapReduce implementation that works on a single
FileSystemDirectory (from Hadoop contrib/index).
Just added new code for this:
https://github.com/frankscholten/mahout/commit/595484c0661ad7e373bbf24519f8061b9051d58b
My previous commit had a bug, all Mappers worked on the entire input cause I
still used an IndexReader instead of SegmentReader. Added unit tests for this
and this works. However once I made the fix I had trouble starting a Hadoop /
Mahout cluster with Whirr so didn't run it on an actual cluster. Will try again
soon and report back.
When this all works I will fix the field / extraFields things, changing the
options parsing other things you mentioned.
Then I can look at multiple indexes or shards.
> LuceneIndexToSequenceFiles (lucene2seq) utility
> -----------------------------------------------
>
> Key: MAHOUT-944
> URL: https://issues.apache.org/jira/browse/MAHOUT-944
> Project: Mahout
> Issue Type: New Feature
> Components: Integration
> Affects Versions: 0.5
> Reporter: Frank Scholten
> Assignee: Grant Ingersoll
> Priority: Minor
> Fix For: 0.7
>
> Attachments: MAHOUT-944.patch, MAHOUT-944.patch, MAHOUT-944.patch,
> MAHOUT-944.patch
>
>
> Here is a lucene2seq tool I used in a project. It creates sequence files
> based on the stored fields of a lucene index.
> The output from this tool can be then fed into seq2sparse and from there you
> can do text clustering.
> Comes with Java bean configuration.
> Let me know what you think. Some CLI code can be added later on. I used this
> for a small-scale project +- 100.000 docs. Is a MR version useful or is that
> overkill?
> See https://github.com/frankscholten/mahout/tree/lucene2seq for commits and
> review comments from Simon Willnauer (Thanks Simon!)
> or the attached patch.
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