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Posted to common-dev@hadoop.apache.org by "Steve Loughran (Jira)" <ji...@apache.org> on 2020/09/18 12:45:00 UTC

[jira] [Created] (HADOOP-17275) Implement Incremental globStatus() -> RemoteIterator class

Steve Loughran created HADOOP-17275:
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             Summary: Implement Incremental globStatus() -> RemoteIterator class
                 Key: HADOOP-17275
                 URL: https://issues.apache.org/jira/browse/HADOOP-17275
             Project: Hadoop Common
          Issue Type: Sub-task
          Components: fs
    Affects Versions: 3.3.0
            Reporter: Steve Loughran


globStatus/globber is inefficient, not incremental and doesn't provide a way to query any IOStatistics.

Proposed: 
* new IncrementalGlobber class which takes an interface to the file source (+impls for FS and FC) which offer the incremental ops
* use incremental listStatusIncremental calls
* or, if no wildcards, full deep listFiles(recursive)
* collect IOStatistics from source ops, aggregate and serve

Potentially a lot of work...need to look carefully here



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