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https://issues.apache.org/jira/browse/HDFS-375?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tsz Wo (Nicholas), SZE resolved HDFS-375.
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    Resolution: Not A Problem

I believe this issue went stale.  Closing.

> DFSClient cpu overhead is too high
> ----------------------------------
>
>                 Key: HDFS-375
>                 URL: https://issues.apache.org/jira/browse/HDFS-375
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>            Reporter: Runping Qi
>
> When we do dfs throughput test using hadoop dfs -cat, we have observed that 
> the client side cpu usage is very high, 3 to five times that of a data node 
> serving the file.
> Before 0.18, the data node cpu usage was equally high, and this problem is 
> fixed since 0.18. However, the client side problem still exists.

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