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From "Andrew McNabb (JIRA)" <j...@apache.org>
Subject [jira] Created: (HADOOP-953) huge log files
Date Mon, 29 Jan 2007 21:57:49 GMT
huge log files

                 Key: HADOOP-953
                 URL: https://issues.apache.org/jira/browse/HADOOP-953
             Project: Hadoop
          Issue Type: Improvement
    Affects Versions: 0.10.1
         Environment: N/A
            Reporter: Andrew McNabb

On our system, it's not uncommon to get 20 MB of logs with each MapReduce job.  It would be
very helpful if it were possible to configure Hadoop daemons to write logs only when major
things happen, but the only conf options I could find are for increasing the amount of output.
 The disk is really a bottleneck for us, and I believe that short jobs would run much more
quickly with less disk usage.  We also believe that the high disk usage might be triggering
a kernel bug on some of our machines, causing them to crash.  If the 20 MB of logs went down
to 20 KB, we would probably still have all of the information we needed.


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