Implement getContentSummary(..) in HftpFileSystem
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Key: HDFS-786
URL: https://issues.apache.org/jira/browse/HDFS-786
Project: Hadoop HDFS
Issue Type: Improvement
Reporter: Tsz Wo (Nicholas), SZE
Assignee: Tsz Wo (Nicholas), SZE
HftpFileSystem does not override getContentSummary(..). As a result, it uses
FileSystem's default implementation, which computes content summary on the
client side by calling listStatus(..) recursively. In contrast,
DistributedFileSystem has overridden getContentSummary(..) and does the
computation on the NameNode.
As a result, running "fs -dus" on hftp is much slower than running it on hdfs.
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