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Posted to issues@flink.apache.org by "Aljoscha Krettek (JIRA)" <ji...@apache.org> on 2015/09/18 18:59:04 UTC

[jira] [Assigned] (FLINK-2706) Add support for streaming RollingFileSink to truncate / append on UNIX file systems

     [ https://issues.apache.org/jira/browse/FLINK-2706?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Aljoscha Krettek reassigned FLINK-2706:
---------------------------------------

    Assignee: Aljoscha Krettek

> Add support for streaming RollingFileSink to truncate / append on UNIX file systems
> -----------------------------------------------------------------------------------
>
>                 Key: FLINK-2706
>                 URL: https://issues.apache.org/jira/browse/FLINK-2706
>             Project: Flink
>          Issue Type: Improvement
>          Components: Streaming Connectors
>    Affects Versions: 0.10
>            Reporter: Stephan Ewen
>            Assignee: Aljoscha Krettek
>
> Efficient exactly-once behavior needs the filesystem to support appending and truncating files.
> Since the UNIX file system API allows to append files and truncate files, we can support perfect exactly-once behavior efficiently on all file systems that expose a UNIX / POSIX-style interface (local FS, NFS, MapR FS).
> Without this support, only Hadoop 2.7+ versions support proper exactly once behavior.



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