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https://issues.apache.org/jira/browse/HDFS-13693?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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zhouyingchao updated HDFS-13693:
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Attachment: HDFS-13693-001.patch
Status: Patch Available (was: Open)
Run all hdfs related unit tests and does not introduce new failures.
> Remove unnecessary search in INodeDirectory.addChild during image loading
> -------------------------------------------------------------------------
>
> Key: HDFS-13693
> URL: https://issues.apache.org/jira/browse/HDFS-13693
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: namenode
> Reporter: zhouyingchao
> Priority: Major
> Attachments: HDFS-13693-001.patch
>
>
> In FSImageFormatPBINode.loadINodeDirectorySection, all child INodes are added
> to their parent INode's map one by one. The adding procedure will search a
> position in the parent's map and then insert the child to the position.
> However, during image loading, the search is unnecessary since the insert
> position should always be at the end of the map given the sequence they are
> serialized on disk.
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