[SPARK-4303] [MLLIB] Use "Long" IDs instead of "Int" in ALS.Rating class

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Duplicate
• Component/s: MLlib
• Assignee: Unassigned
• Reporter: Jia Xu
• Created: 07/Nov/14 21:32
• Updated: 08/Nov/14 02:21
• Resolved: 07/Nov/14 23:14

Description

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)

Issue Links

• duplicates: SPARK-2465 Use long as user / item ID for ALS