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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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Lisheng Sun updated HDFS-13693:
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Description:
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.
Test this patch against
was: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.
> 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
> Assignee: Lisheng Sun
> 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.
>
> Test this patch against
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