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From "Runping Qi (JIRA)" <j...@apache.org>
Subject [jira] Created: (HADOOP-4394) DFSClient cpu overhead is too high
Date Sat, 11 Oct 2008 00:05:44 GMT
DFSClient cpu overhead is too high
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                 Key: HADOOP-4394
                 URL: https://issues.apache.org/jira/browse/HADOOP-4394
             Project: Hadoop Core
          Issue Type: Improvement
          Components: dfs
            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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