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From Vinod Kone <vinodk...@apache.org>
Subject Re: Review Request 65437: Added documentation for fault domains.
Date Fri, 02 Feb 2018 19:38:48 GMT


> On Feb. 1, 2018, 10:18 p.m., Vinod Kone wrote:
> > docs/fault-domains.md
> > Lines 63 (patched)
> > <https://reviews.apache.org/r/65437/diff/2/?file=1950950#file1950950line63>
> >
> >     s/The default/By default, the/
> 
> Benno Evers wrote:
>     Are you sure about this? It would imply to me as a reader that this behaviour can
be changed.

I see. Yea, I'm not very sure then, what you have is probably less confusing.


> On Feb. 1, 2018, 10:18 p.m., Vinod Kone wrote:
> > docs/fault-domains.md
> > Lines 80 (patched)
> > <https://reviews.apache.org/r/65437/diff/2/?file=1950950#file1950950line80>
> >
> >     Non-region-aware frameworks will only receive offers from the primary region
(region containing masters). They won't get offers from other regions.
> 
> Benno Evers wrote:
>     Does this actually imply that users should upgrade all their frameworks to be partition-aware
before configuring masters and agents with fault domains? In this example, it would be quite
devastating if two out of three datacenters suddenly went completely unused.

s/primary/local/ in my first comment.

Do you mean REGION aware and not PARTION aware? So, yes, frameworks need to register with
REGION_AWARE capability if they want remote region offers. The rationale was that most frameworks
want their workloads in the local region and not magically go to remote regions with potentially
higher latencies without an explicit opt-in. Note that region-aware frameworks should ideally
expose the remote launching capability to their users too (e.g., via a configuration option
in the app definition) before they start registering with REGION_AWARE capability.


- Vinod


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On Feb. 2, 2018, 7:30 p.m., Benno Evers wrote:
> 
> -----------------------------------------------------------
> This is an automatically generated e-mail. To reply, visit:
> https://reviews.apache.org/r/65437/
> -----------------------------------------------------------
> 
> (Updated Feb. 2, 2018, 7:30 p.m.)
> 
> 
> Review request for mesos and Vinod Kone.
> 
> 
> Bugs: MESOS-8483
>     https://issues.apache.org/jira/browse/MESOS-8483
> 
> 
> Repository: mesos
> 
> 
> Description
> -------
> 
> Fault domains are a new feature in 1.5 which did not yet have
> a corresponding description in the documentation.
> 
> 
> Diffs
> -----
> 
>   docs/configuration/master-and-agent.md f247498ead43a16bbef5afb49d453073dd9ab6ef 
>   docs/fault-domains.md PRE-CREATION 
>   docs/home.md f5b65cc7895b10181e1b8483e3ee9da596d00fd6 
> 
> 
> Diff: https://reviews.apache.org/r/65437/diff/3/
> 
> 
> Testing
> -------
> 
> No.
> 
> 
> Thanks,
> 
> Benno Evers
> 
>


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