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From "Runping Qi (JIRA)" <j...@apache.org>
Subject [jira] Created: (HADOOP-4450) The local bytes read of Mapper tasks are too high than bytes written
Date Fri, 17 Oct 2008 22:44:44 GMT
The local bytes read of Mapper tasks are too high than bytes written
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                 Key: HADOOP-4450
                 URL: https://issues.apache.org/jira/browse/HADOOP-4450
             Project: Hadoop Core
          Issue Type: Bug
          Components: mapred
    Affects Versions: 0.17.2
            Reporter: Runping Qi



The local bytes read are 6 times that of local bytes written.
This is very hard to explain.

Here is the relevant counters:

Counters for tip_200810170704_0044_m_000001

File Systems
	Local bytes read 	6,684,486,486
	Local bytes written 	1,007,113,506
	HDFS bytes read 	147,200,700

Map-Reduce Framework
	Map input records 	3,588,883
	Map output records 	3,588,883
	Map input bytes 	147,200,579
	Map output bytes 	464,822,403
	Combine input records 	0
	Combine output records 	0

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