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Posted to dev@mahout.apache.org by "Robin Anil (JIRA)" <ji...@apache.org> on 2010/02/07 19:58:27 UTC

[jira] Commented: (MAHOUT-277) Increase number of entries in memory per chunk of dictionary

    [ https://issues.apache.org/jira/browse/MAHOUT-277?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12830744#action_12830744 ] 

Robin Anil commented on MAHOUT-277:
-----------------------------------

Keeping it open for further improvements.

> Increase number of entries in memory per chunk of dictionary 
> -------------------------------------------------------------
>
>                 Key: MAHOUT-277
>                 URL: https://issues.apache.org/jira/browse/MAHOUT-277
>             Project: Mahout
>          Issue Type: Improvement
>    Affects Versions: 0.3
>            Reporter: Robin Anil
>            Assignee: Robin Anil
>             Fix For: 0.3
>
>         Attachments: MAHOUT-277.patch
>
>
> Java HashMap was having a huge overhead that was decreasing the number of entries per chunk hence increases number of passes over the data
> Dictionary was using Text,LongWritable key. Integer is enough to keep the feature ids.

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