I think the idea is good, but ideally if feature development is expected to
span more than a single quarter it would be best to target phased
incorporation into mainline, and not defer everything to the final moment.
I think it also helps focus review, testing, documentation etc. to have
manageable chunks of work merged long before any perceived deadline.

The way I read this - feature split into few phases. Feature branch that is
merged at the end of a phase.
Sounds reasonable to me. Incremental work is always preferable, easier to
maintain.


On Fri, 17 Sep 2021 at 16:40, bened...@apache.org <bened...@apache.org>
wrote:

> It’s worth clarifying that CEP-10 has been broken up into phases, and this
> will be a roll-up branch for only the first portion.
>
> I think we should be cautious about how we approach the idea of feature
> branches, as there is significant overhead for everyone as branches grow -
> the CEP-10 and CEP-14 work has had significant additional overhead
> introduced by this. There are also additional risks introduced during
> frequent or long term rebases, as they are hard to review.
>
> I think the idea is good, but ideally if feature development is expected
> to span more than a single quarter it would be best to target phased
> incorporation into mainline, and not defer everything to the final moment.
> I think it also helps focus review, testing, documentation etc. to have
> manageable chunks of work merged long before any perceived deadline.
>
>
> From: Jeremiah D Jordan <jeremiah.jor...@gmail.com>
> Date: Friday, 17 September 2021 at 20:50
> To: Cassandra DEV <dev@cassandra.apache.org>
> Subject: Re: [DISCUSS] CASSANDRA-16922 CEP-10: Major Prerequisites (Phase
> 1)
> > As these progress through review, the aim is to roll them up into a
> single branch and merge that to trunk together, keeping the separate
> commits for the specific JIRAs.
>
> I think this is a great idea.  Where do you see the “Roll Up Branch”
> living?  Does the project want to start keeping long lived feature branches
> in the apache/cassandra repository?  Or should the roll up branch still be
> kept in a fork?
>
> Caleb expressed interest in following this development model for SAI as
> well, and I think it makes sense for all of the larger CEPs to develop them
> in longer lived feature branches to be merged into trunk once they are
> complete.
>
> -Jeremiah
>
> > On Sep 17, 2021, at 1:52 PM, Sam Tunnicliffe <s...@beobal.com> wrote:
> >
> > This umbrella issue covers the major structural refactorings to enable
> the higher level pieces of CEP-10. The current proposal is to post separate
> patches for each JIRA to lessen the review burden as much as possible.
> However, the patches are incremental, so there is a dependency from one to
> the next. As these progress through review, the aim is to roll them up into
> a single branch and merge that to trunk together, keeping the separate
> commits for the specific JIRAs.
> >
> > These patches are not intended to introduce any significant new
> behaviour, they're largely just introducing new abstractions to enable
> pieces of the system to be swapped out when running simulations.These
> patches are foundational to the CEP-10 work and so getting them landed is
> something of a priority. They have been produced collaboratively by several
> committers, but obviously further review and feedback is strongly
> encouraged. That said, allocating requisite time and resources to such
> large and complex changesets can be challenging, so we have a balance to
> strike.
> >
> > Whilst the 2 committer review requirement can technically be satisfied
> already, it's reasonable to give fair warning and opportunity to contribute
> before we start moving this forward. Notwithstanding that, there are some
> failing tests still to address, mostly due to changes made in trunk since
> this work was started and subsequently encountered during rebase.
> >
> > Thanks,
> > Sam
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>
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