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https://issues.apache.org/jira/browse/HADOOP-3461?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12644465#action_12644465
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Konstantin Shvachko commented on HADOOP-3461:
---------------------------------------------
We have a time/space tradeoff here. Using Strings eliminates conversions
to/from StringBytesWritable, but it also increases the size of
INodeFileUnderConstruction since String uses 2 bytes per character instead of 1.
I think it is right to resolve it in favor of time because the number of files
under construction is small relative to the total number of files.
+1
> Remove dfs.StringBytesWritbale
> ------------------------------
>
> Key: HADOOP-3461
> URL: https://issues.apache.org/jira/browse/HADOOP-3461
> Project: Hadoop Core
> Issue Type: Improvement
> Components: dfs
> Reporter: Tsz Wo (Nicholas), SZE
> Assignee: Tsz Wo (Nicholas), SZE
> Attachments: 3461_20081030.patch
>
>
> In dfs, some classes, such as INodeFileUnderConstruction use,
> StringBytesWritbale as member type. The values are converted from String to
> StringBytesWritbale in setter and converted back to String in getter. These
> overhead is unnecessary.
> StringBytesWritbale is not used in RPC nor dfs image. No version change will
> be introduced.
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