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Posted to common-dev@hadoop.apache.org by "Thomas Marquardt (JIRA)" <ji...@apache.org> on 2018/06/18 04:08:00 UTC

[jira] [Created] (HADOOP-15547) WASB: listStatus performance

Thomas Marquardt created HADOOP-15547:
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             Summary: WASB: listStatus performance
                 Key: HADOOP-15547
                 URL: https://issues.apache.org/jira/browse/HADOOP-15547
             Project: Hadoop Common
          Issue Type: Bug
          Components: fs/azure
    Affects Versions: 3.0.2, 2.9.1
            Reporter: Thomas Marquardt
            Assignee: Thomas Marquardt


The WASB implementation of Filesystem.listStatus is very slow due to O(n!) algorithm to remove duplicates and uses too much memory due to the extra conversion from BlobListItem to FileMetadata to FileStatus.  It takes over 30 minutes to list 700,000 files.  



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