Yiqun Lin updated HDFS-10925:
    Attachment: HDFS-10925.004.patch

> Cache symlinkString in INodeSymlink
> -----------------------------------
>                 Key: HDFS-10925
>                 URL: https://issues.apache.org/jira/browse/HDFS-10925
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: hdfs
>            Reporter: Yiqun Lin
>            Assignee: Yiqun Lin
>            Priority: Minor
>         Attachments: HDFS-10925.001.patch, HDFS-10925.002.patch, 
> HDFS-10925.003.patch, HDFS-10925.004.patch
> In {{INodeSymlink}}'s construct method, it will transfer the input symlink 
> string to a byte array. If we want to invoke 
> {{INodeSymlink#getSymlinkString}}, it will transfer the byte array to the 
> string again. Since we don't cache symlinkString  here, it will do the 
> {{DFSUtil.bytes2String}} method every time. It seems not efficient.

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