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https://issues.apache.org/jira/browse/HADOOP-2705?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12562336#action_12562336
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Chris Douglas commented on HADOOP-2705:
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My mistake: the difference on a single node is very slight, typically around 5%
on reads for most cases. Lzo doesn't distinguish itself as was suspected
(following the write tests, the first read test is significantly slower; I'm
not sure why).
If this is worthwhile, it won't be clear from the results I have. My apologies.
> io.file.buffer.size should default to a value larger than 4k
> ------------------------------------------------------------
>
> Key: HADOOP-2705
> URL: https://issues.apache.org/jira/browse/HADOOP-2705
> Project: Hadoop Core
> Issue Type: Improvement
> Components: conf
> Reporter: Chris Douglas
> Priority: Minor
> Fix For: 0.16.0
>
> Attachments: 2705-0.patch
>
>
> Tests using HADOOP-2406 suggest that increasing this to 32k from 4k improves
> read times for block, lzo compressed SequenceFiles by over 40%; 32k is a
> relatively conservative bump.
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