[jira] [Created] (SPARK-24280) Speed up indexing of files in object stores by using listFiles(path, recursive=true)

["Steve Loughran (JIRA)" <ji...@apache.org>]

Steve Loughran created SPARK-24280:
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             Summary: Speed up indexing of files in object stores by using listFiles(path, recursive=true)
                 Key: SPARK-24280
                 URL: https://issues.apache.org/jira/browse/SPARK-24280
             Project: Spark
          Issue Type: Improvement
          Components: SQL
    Affects Versions: 2.3.0
            Reporter: Steve Loughran


Object stores which mock directory structures can have awful performance when a treewalk is executed on them. The {{FileSystem.listFiles(path, recursive=true)}} call can reduce this overhead to ~ O(1) by doing bulk paged listing of all files under a path. For filesystems without this operation, the treewalk is implemented behind the scenes: no cost compared to today's code, just a simplification



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