spark-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Shixiong Zhu (JIRA)" <>
Subject [jira] [Commented] (SPARK-4644) Implement skewed join
Date Mon, 01 Dec 2014 02:49:12 GMT


Shixiong Zhu commented on SPARK-4644:

User 'zsxwing' has created a pull request for this issue:

Sorry that I created a wrong title name for another PR.

> Implement skewed join
> ---------------------
>                 Key: SPARK-4644
>                 URL:
>             Project: Spark
>          Issue Type: Improvement
>          Components: Spark Core
>            Reporter: Shixiong Zhu
>         Attachments: Skewed Join Design Doc.pdf
> Skewed data is not rare. For example, a book recommendation site may have several books
which are liked by most of the users. Running ALS on such skewed data will raise a OutOfMemory
error, if some book has too many users which cannot be fit into memory. To solve it, we propose
a skewed join implementation.

This message was sent by Atlassian JIRA

To unsubscribe, e-mail:
For additional commands, e-mail:

View raw message