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From "Alessandro D'Armiento (JIRA)" <>
Subject [jira] [Resolved] (NIFI-6464) ListHDFS should support fragment attributes with strategies
Date Tue, 23 Jul 2019 14:53:00 GMT


Alessandro D'Armiento resolved NIFI-6464.
    Resolution: Not A Problem

> ListHDFS should support fragment attributes with strategies
> -----------------------------------------------------------
>                 Key: NIFI-6464
>                 URL:
>             Project: Apache NiFi
>          Issue Type: Improvement
>          Components: Core Framework
>    Affects Versions: 1.9.2
>            Reporter: Alessandro D'Armiento
>            Priority: Minor
> h2. Current Situation
> ListHDFS doesn't support Fragmentation attributes
> h2. Improvement Proposal
>  * Since the processor works on a 1:N semantic (1 input trigger flowfile, N output flowfiles)
it would be nice to support fragmentation attributes (for example for subsequent merge operations)
>  ** It would be also useful to support different fragmentation strategies, in order to
support multiple user cases. For example, it should be possible to select:
>  *** A "one for all" fragmentation strategy which will create a single fragmentation
group. Therefore, all files will have the same fragment.identifier, the same fragment.count,
equal to the total number N of listed files, and fragment.index ∈ [0, N).
>  *** A "per subdir" fragmentation strategy which will create different fragmentation
groups, one for each scanned subdirectory of the given path. Therefore, for each subfolder,
flowfiles will have a specific fragment.identifier, fragment.count will be, for each flowfile,
equal to the number Ni of files in the i-th directory, and fragment.index ∈ [0, Ni).

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