crunch-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Josh Wills (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CRUNCH-246) HFileSource
Date Thu, 15 Aug 2013 17:54:04 GMT

    [ https://issues.apache.org/jira/browse/CRUNCH-246?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13741267#comment-13741267
] 

Josh Wills commented on CRUNCH-246:
-----------------------------------

Hey Chao-- this attempt looks good to me. My one suggestion would be to have the HFileSource
implement TableSource (instead of vanilla Source) so that we can incorporate both the key
(ImmutableBytesWritable) and the KeyValue in the input. TableSources return PTable<K, V>
instead of PCollection<V>.
                
> 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: crunch-246.patch, 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?

--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see: http://www.atlassian.com/software/jira

Mime
View raw message