[jira] [Commented] (CHUKWA-648) Make Chukwa Reduce Type to support hierarchy format

["Ari Rabkin (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/CHUKWA-648?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13415673#comment-13415673 ] 

Ari Rabkin commented on CHUKWA-648:
-----------------------------------

Overall approach looks solid. 

A few quibbles about the patch.

HierarchyDataType shouldn't have an empty main() method. 

HierarchyDataType SHOULD have a top-level Javadoc comment saying a bit about what it's for and where it's used.
                
> Make Chukwa Reduce Type to support hierarchy format
> ---------------------------------------------------
>
>                 Key: CHUKWA-648
>                 URL: https://issues.apache.org/jira/browse/CHUKWA-648
>             Project: Chukwa
>          Issue Type: New Feature
>          Components: Data Processors
>    Affects Versions: 0.4.0, 0.6.0
>            Reporter: Jie Huang
>         Attachments: Chukwa-648-0_4.patch
>
>
> Currently the Reduce Type decides the final directory-structure of the processed data over HDFS. And it doesn't support a hierarchy format like 
> {noformat}
> hdfs/namenode
> hdfs/datanode
> ...
> {noformat}
> A hierarchy structure makes it easy to do the HDFS File Filter versus to the flat storage structure while doing the analysis job.  

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