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Posted to issues@spark.apache.org by "Sean Owen (JIRA)" <ji...@apache.org> on 2014/11/08 00:15:33 UTC
[jira] [Resolved] (SPARK-4303) [MLLIB] Use "Long" IDs instead of
"Int" in ALS.Rating class
[ https://issues.apache.org/jira/browse/SPARK-4303?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Sean Owen resolved SPARK-4303.
------------------------------
Resolution: Duplicate
I think this is an exact duplicate of https://issues.apache.org/jira/browse/SPARK-2465. See the discussion about why this won't be committed in the foreseeable future. I agree there are some arguments for long but fair enough there are downsides too.
> [MLLIB] Use "Long" IDs instead of "Int" in ALS.Rating class
> -----------------------------------------------------------
>
> Key: SPARK-4303
> URL: https://issues.apache.org/jira/browse/SPARK-4303
> Project: Spark
> Issue Type: Improvement
> Components: MLlib
> Reporter: Jia Xu
>
> In many big data recommendation applications, the IDs used for "users" and "products" are usually Long type instead of Integer.
> So a Rating class based on Long IDs should be more useful for these applications.
> i.e. case class Rating(val user: Long, val product: Long, val rating: Double)
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