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From Steve Niemitz <sniem...@apache.org>
Subject Re: Are we ready to remove the observer?
Date Mon, 04 Apr 2016 21:31:56 GMT
It seems like the easiest path forward would be to have the executor itself
host the observer web UI, if the HTTP port for the UI were configured as
just another port on the task, the aurora UI could just link to /mname for
that instance.

I think the overall "what is running on this machine" view the observer
displays (if you go to it without a task ID) is much less useful and could
probably be removed without much sadness.

On Mon, Apr 4, 2016 at 5:23 PM, Bill Farner <wfarner@apache.org> wrote:

> >
> > why don't we revisit the problem from the other direction and see if we
> > can remove checkpoints?
>
>
> Simplicity, again :-)  If it turns out we don't need the observer anyhow,
> it saves a lot of time.  I'm just poking at different parts to make sure we
> can still justify their weight.
>
> On Mon, Apr 4, 2016 at 1:54 PM, Zameer Manji <zmanji@apache.org> wrote:
>
> > On Mon, Apr 4, 2016 at 1:47 PM, Bill Farner <wfarner@apache.org> wrote:
> >
> > > We clearly have different experiences - i've never really benefited
> from
> > > viewing the process graph, as most jobs have very simple sequences that
> > > could be easily explained by a text file in the sandbox.  On the
> > contrary,
> > > i've encountered people confused by the process graph, the observer,
> and
> > > sandbox browsing...so i must respectfully disagree that it is
> universally
> > > appreciated.
> > >
> > > What i'm trying to achieve is simplicity.  The observer is an extra
> > moving
> > > part, and another thing for operators to understand and maintain.  It
> > also
> > > couples Aurora to one relatively specific way of running tasks, which
> > makes
> > > it difficult to open new use cases like Docker tasks.  Removing the
> > > observer starts to pull on a thread of complexity that i don't think
> > Aurora
> > > benefits much from, for example state checkpointing by the executor.
> > >
> > > My goal is not to apply pressure, but to perform a gut check.  If the
> > > answer is "No", that's fine.
> > >
> >
> >
> > Bill,
> >
> > I think you are pulling on the right thread here but I think revisiting
> the
> > observer is the wrong way of approaching the problem. I also agree that
> > Aurora doesn't benefit much from state checkpointing by the executor and
> > the observer is an extension of that since it provides a read only human
> > friendly view of the data in the checkpoints. However, instead of
> removing
> > the observer (and degrading the UX around accessing the data in the
> > checkpoints), why don't we revisit the problem from the other direction
> and
> > see if we can remove checkpoints?
> >
> >
> > --
> > Zameer Manji
> >
>

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