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Posted to issues@tez.apache.org by "Hitesh Shah (JIRA)" <ji...@apache.org> on 2014/10/14 00:26:34 UTC
[jira] [Updated] (TEZ-1608) TopK example
[ https://issues.apache.org/jira/browse/TEZ-1608?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Hitesh Shah updated TEZ-1608:
-----------------------------
Assignee: Krisztian Horvath
> TopK example
> ------------
>
> Key: TEZ-1608
> URL: https://issues.apache.org/jira/browse/TEZ-1608
> Project: Apache Tez
> Issue Type: Sub-task
> Affects Versions: 0.5.0
> Reporter: Janos Matyas
> Assignee: Krisztian Horvath
> Attachments: TEZ-1608-1.patch, TEZ-1608-2.patch
>
>
> The goal of this sample is to find the topK elements of a dataset, while guiding through the basics of Tez (DAG creation, tokenizers, custom comparators and parallelism).
> An example use case for top K:
> Given a large data set in CSV format of user comments on a site listed as: userid,postid,commentid,comment,timestamp and we are looking for the top K commenter or the posts with the most comment.
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