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From "Zoran Dimitrijevic (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HADOOP-11827) Speed-up distcp buildListing() using threadpool
Date Sat, 11 Apr 2015 19:38:12 GMT
Zoran Dimitrijevic created HADOOP-11827:
-------------------------------------------

             Summary: Speed-up distcp buildListing() using threadpool
                 Key: HADOOP-11827
                 URL: https://issues.apache.org/jira/browse/HADOOP-11827
             Project: Hadoop Common
          Issue Type: Improvement
          Components: tools/distcp
    Affects Versions: 3.0.0
            Reporter: Zoran Dimitrijevic
            Assignee: Zoran Dimitrijevic
            Priority: Minor


For very large source trees on s3 distcp is taking long time to build file listing (client
code, before starting mappers). For a dataset I used (1.5M files, 50K dirs) it was taking
65 minutes before my fix in HADOOP-11785 and 36 minutes after the fix).





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