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From "Owen O'Malley (JIRA)" <j...@apache.org>
Subject [jira] Resolved: (HADOOP-106) Data blocks should be record-oriented.
Date Tue, 23 Oct 2007 22:13:50 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-106?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Owen O'Malley resolved HADOOP-106.

    Resolution: Won't Fix

I agree with Eric. This is backwards. You want the sequence file to pad out to block boundaries.

> Data blocks should be record-oriented.
> --------------------------------------
>                 Key: HADOOP-106
>                 URL: https://issues.apache.org/jira/browse/HADOOP-106
>             Project: Hadoop
>          Issue Type: Wish
>          Components: dfs
>    Affects Versions: 0.2.0
>            Reporter: Andrzej Bialecki 
>            Assignee: Sameer Paranjpye
> If data blocks were starting and ending on data record boundaries, and not in random
places within a file, it would give some important advantages:
> * it would be possible to avoid "fishing" for the beginning of first record in a split
(see SequenceFile.Reader.sync()).
> * it would make recovering from DFS errors much more successful and easier - in most
cases missing blocks could be just skipped and the remaining parts combined together.

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