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Posted to issues@spark.apache.org by "Sean Owen (JIRA)" <ji...@apache.org> on 2017/09/23 16:10:00 UTC
[jira] [Assigned] (SPARK-20448) Document how FileInputDStream works
with object storage
[ https://issues.apache.org/jira/browse/SPARK-20448?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Sean Owen reassigned SPARK-20448:
---------------------------------
Assignee: Steve Loughran
> Document how FileInputDStream works with object storage
> -------------------------------------------------------
>
> Key: SPARK-20448
> URL: https://issues.apache.org/jira/browse/SPARK-20448
> Project: Spark
> Issue Type: Documentation
> Components: Documentation
> Affects Versions: 2.1.0
> Reporter: Steve Loughran
> Assignee: Steve Loughran
> Priority: Minor
> Fix For: 2.3.0
>
>
> Object stores work differently from filesystems: intermediate writes not visible, renames are really O(data) copies, not O(1) transactions.
> This makes working with them as DStreams fundamentally different: you can write straight into the destination.
> 1. Document how FileinputDStreams scan directories for changes
> 2. Document how object stores behave differently, and the implications
> for users.
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