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From "Ryan Brush (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (CRUNCH-246) HFileSource
Date Fri, 09 Aug 2013 14:16:48 GMT

     [ https://issues.apache.org/jira/browse/CRUNCH-246?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Ryan Brush updated CRUNCH-246:
------------------------------

    Attachment: HFileInputFormat.java

Attaching a simple HFileInputFormat we've used as a reference for this issue. This was an
implementation detail of a larger system for us, and unfortunately lacks focused unit tests
on this class alone.  However, it could be refactored to help meet this need, or at least
as an example of plugging into HFiles.

We can effectively consider the attached code as Apache licensed, and can be used in part
or full as part of this JIRA.

I should disclaim this is something I wrote some time ago and HBase has evolved since then,
but it does work as advertised.
                
> HFileSource
> -----------
>
>                 Key: CRUNCH-246
>                 URL: https://issues.apache.org/jira/browse/CRUNCH-246
>             Project: Crunch
>          Issue Type: Improvement
>          Components: IO
>            Reporter: Chao Shi
>            Assignee: Chao Shi
>         Attachments: HFileInputFormat.java
>
>
> I found this useful when directly perform MR on HFiles. I used it yesterday when copying
a bunch of HFiles to another cluster (where the region layout is different).
> There is no HFileInputFormat provided by HBase, but I found the following from google:
> https://gist.github.com/leifwickland/1120311
> http://blog.csdn.net/kirayuan/article/details/7794402 (Java version of the above. The
webpage is in chinese, but you can see the code)
> I'm not sure if we copy their code directly (copyright issue?). Anyone knows?

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