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From "stack (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-3315) New binary file format
Date Tue, 23 Sep 2008 19:17:44 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-3315?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12633852#action_12633852
] 

stack commented on HADOOP-3315:
-------------------------------

hbase depends on the MapFile#getClosest (and MapFile#getClosestBefore): i.e. "Finds the record
that is the closest match to the specified key." returning either an exact match as TFile#locate
does or the next key (before or after dependent on provided parameters).  TFile does not expose
its index so this facility would be hard to build on TFile even in a subclass.

> New binary file format
> ----------------------
>
>                 Key: HADOOP-3315
>                 URL: https://issues.apache.org/jira/browse/HADOOP-3315
>             Project: Hadoop Core
>          Issue Type: New Feature
>          Components: io
>            Reporter: Owen O'Malley
>            Assignee: Amir Youssefi
>         Attachments: HADOOP-3315_20080908_TFILE_PREVIEW_WITH_LZO_TESTS.patch, HADOOP-3315_20080915_TFILE.patch,
TFile Specification Final.pdf
>
>
> SequenceFile's block compression format is too complex and requires 4 codecs to compress
or decompress. It would be good to have a file format that only needs 

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