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From "Owen O'Malley (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-1381) The distance between sync blocks in SequenceFiles should be configurable rather than hard coded to 2000 bytes
Date Fri, 18 May 2007 17:28:16 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-1381?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12496968
] 

Owen O'Malley commented on HADOOP-1381:
---------------------------------------

The current setup forces all non-block compressed sequence files to accept a 1% overhead for
sync bytes. That is a fair amount of overhead on 100tb... Block compressed sequence files
do just fine with 1mb between sync blocks.

> The distance between sync blocks in SequenceFiles should be configurable rather than
hard coded to 2000 bytes
> -------------------------------------------------------------------------------------------------------------
>
>                 Key: HADOOP-1381
>                 URL: https://issues.apache.org/jira/browse/HADOOP-1381
>             Project: Hadoop
>          Issue Type: Improvement
>          Components: io
>            Reporter: Owen O'Malley
>             Fix For: 0.14.0
>
>
> Currently SequenceFiles put in sync blocks every 2000 bytes. It would be much better
if it was configurable with a much higher default (1mb or so?).

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