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Date: Mon, 6 Oct 2014 17:55:26 -0700
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Subject: Re: Removing Aurora's special handling of the 'rack' attribute
From: Kevin Sweeney <kevints@apache.org>
To: Aurora <dev@aurora.incubator.apache.org>
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This ticket (5 watchers and 2 votes) suggests demand exists:
https://issues.apache.org/jira/browse/AURORA-174

On Mon, Oct 6, 2014 at 5:47 PM, Zameer Manji <zmanji@twopensource.com>
wrote:

>  I haven't done it all at once because I haven't seen any demand for
> removing the 'host' attribute. If you (or other people) disagree, I can
> remove both special cases in one go.
>
> On Mon, Oct 6, 2014 at 5:37 PM, Kevin Sweeney <kevints@apache.org> wrote:
>
> > Why not take it all at once and avoid the need for 2 deprecation cycles=
?
> > With that change folks with existing Mesos clusters would be able to
> deploy
> > Aurora without changing the attributes flag on every slave (which
> requires
> > rebooting the entire cluster to take effect).
> >
> > On Mon, Oct 6, 2014 at 5:24 PM, Zameer Manji <zmanji@twopensource.com>
> > wrote:
> >
> > > I currently don't plan on removing 'host' right now or in the future.
> If
> > > there is a need to remove it I would prefer to tackle it later.
> > >
> > > On Mon, Oct 6, 2014 at 5:13 PM, Kevin Sweeney <kevints@apache.org>
> > wrote:
> > >
> > > > Will 'host' be deprecated as well?
> > > >
> > > > On Mon, Oct 6, 2014 at 4:30 PM, Zameer Manji <
> zmanji@twopensource.com>
> > > > wrote:
> > > >
> > > > > I have put up a review <https://reviews.apache.org/r/26391/> whic=
h
> > > > removes
> > > > > the special casing and handling of the =E2=80=98rack=E2=80=99 con=
straint. This is a
> > > > > breaking change because Aurora will no longer inject a rack
> > constraint
> > > > of 1
> > > > > if a job omits a rack constraint value. However this means that
> > Aurora
> > > > will
> > > > > be able to schedule jobs on to slaves which don=E2=80=99t have th=
e =E2=80=98rack=E2=80=99
> > > > attribute
> > > > > and slaves that want to accept tasks from Aurora don=E2=80=99t ne=
ed to have
> > the
> > > > > =E2=80=98rack=E2=80=99 attribute set.
> > > > >
> > > > > Before the next release of Aurora (0.6.0) you should check if you
> are
> > > > > relying on the injected value for scheduling decisions and if so
> > > > explicitly
> > > > > encode a rack limit of 1 in the job's aurora config.
> > > > > =E2=80=8B
> > > > > --
> > > > > Zameer Manji
> > > > >
> > > >
> > >
> > >
> > >
> > > --
> > > Zameer Manji
> > >
> >
>
>
>
> --
> Zameer Manji
>

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