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From "Luke Lu (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-7532) Hadoop web UI 2.0
Date Tue, 23 Aug 2011 23:53:29 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-7532?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13089878#comment-13089878

Luke Lu commented on HADOOP-7532:

First some historical perspective: I have actually proposed the WS + trusted webapp as an
option, when I originally architected AM webapps 8 months ago. The people following the discussion
at the time picked the current option. In retrospect, I think the current option is more in
line with the spirit of MRv2.

bq. That is great, but I argue is not worth the development effort at this time to support

The development effort to support generic AM webapp security is optional and incremental and
has much lower cost than re-architect the whole thing, period.

bq. There are more standard ways to support bucket testing of different UIs on a trusted server
then trying to launch a separate web server for each application that is running.

We're not talking about bucket testing here. We're talking about a major benefit of MRv2:
allowing different organizations to move to different versions of different *types* of apps
on their own schedule. We're not talking about just mapreduce, which is just one *type* of
apps. The WS+trusted UI approach requires O(T*V) (T = number of types of apps, V = number
of versions of apps) of trusted servers, which clearly not scalable. MAPREDUCE-2858 only requires
O(1) number of trusted servers.

bq. {quote}It's an operations nightmare to let users to run arbitrary web UI on a gateway{quote}
bq. That is probably true, and is great argument to get a webservice up and running so the
enhanced visualizations/analytics could all be done on the users desktop .

That's interesting conclusion. The history is showing that we're moving to webapps, because
desktop apps is a nightmare to upgrade/manage/secure :)

bq. What most of the users I have talked to want is access to the data about their processes.
They want to do advanced analysis themselves that is accessible outside of the GUI for a single
MR job.

That's because they didn't have any control to the GUI at all in MRv1. MRv2 empowers users
to do the who damn thing in a cloud/grid/cluster efficiently/reliably/securely :)

> Hadoop web UI 2.0
> -----------------
>                 Key: HADOOP-7532
>                 URL: https://issues.apache.org/jira/browse/HADOOP-7532
>             Project: Hadoop Common
>          Issue Type: Improvement
>    Affects Versions: 0.23.0
>            Reporter: Luke Lu
>            Assignee: Luke Lu
>             Fix For: 0.23.0
> People have expressed interests of bringing Hadoop web UI up to date with the lightweight
embedded web mvc framework used in MAPREDUCE-279 (cf. MAPREDUCE-2399). This is the umbrella
jira for UI improvement for 0.23+. Individual items like web framework refactor/move and the
unique challenge for MR2 webapp security will be filed separately.
> Thoughts/ideas on various improvement of Hadoop web UI are welcome here. Some of the
ideas will naturally become sub-issues.

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