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https://issues.apache.org/jira/browse/SPARK-18085?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15665618#comment-15665618
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Marcelo Vanzin commented on SPARK-18085:
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Hey all, any more feedback here?

I've made some progress in the M3 implementation, but I've been distracted by 
more urgent issues, and it's also a pretty large milestone. But it still would 
be good to know whether people have any concerns about the changes being 
proposed before I spent too much time working on something that people just 
don't want.

Just be aware that where the data is written to is not really the most 
important things here; the main thing is that UI data would now live somewhere 
that is not the Spark driver's memory, and most of the changes are towards 
implementing the abstractions to support that. In fact, you could even still 
store things in memory later on too, although I don't think that will be 
necessary (nor desired).

> Better History Server scalability for many / large applications
> ---------------------------------------------------------------
>
>                 Key: SPARK-18085
>                 URL: https://issues.apache.org/jira/browse/SPARK-18085
>             Project: Spark
>          Issue Type: Umbrella
>          Components: Spark Core, Web UI
>    Affects Versions: 2.0.0
>            Reporter: Marcelo Vanzin
>         Attachments: spark_hs_next_gen.pdf
>
>
> It's a known fact that the History Server currently has some annoying issues 
> when serving lots of applications, and when serving large applications.
> I'm filing this umbrella to track work related to addressing those issues. 
> I'll be attaching a document shortly describing the issues and suggesting a 
> path to how to solve them.



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