[OpenAFS] Re: [OpenAFS-devel] 1.6 and post-1.6 OpenAFS branch management and schedule

[Stephan Wiesand]

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Hi Russ,

On Jun 17, 2010, at 21:44 , Russ Allbery wrote:

> Stephan Wiesand <stephan.wiesand@desy.de> writes:
>> On Jun 17, 2010, at 21:01 , Simon Wilkinson wrote:
>=20
>>> Because every different configuration option you have doubles the
>>> complexity of testing the code. What actually tends to happen is =
that
>>> stuff that isn't enabled by default never actually gets tested when
>>> changes are made, and so ends up rotting.
>=20
>> hmm, that would apply to DAFS unless it's enabled by default starting
>> with the 1.6 RCs?
>=20
> Yes, absolutely.  It's one of the reasons why 1.6 has taken so long.
> There probably isn't any other sane way to drop in a major, disruptive
> change, but certainly the long-term goal is to ensure DAFS works in
> production, then make it the default (I expect for 1.10 or 2.0), then
> remove the non-DAFS code so that we get back down to one =
implementation
> (almost certainly not before 2.2).

sorry, I disagree. If you (the developers and the gatekeepers) are sure =
that DAFS is the way forward, and reasonably close to being ready, 1.6 =
and on should not support anything else. Why defer this to 1.10?

> You'll find that in 1.6 we've been trying to pare down our configure
> options a lot, and many things that were previously configure options =
are
> now just enabled by default, such as support for bos restricted mode.
>=20
>> That's completely reasonable. But it clearly means that DAFS should =
the
>> one and only option to run fileservers with 1.6+. Is this what's
>> planned? Fine, let's test it (and nothing else) and get it ready. But =
if
>> DAFS remains an option that has to be enabled explicitly at build =
time,
>> I'm with Rainer and Christopher: please leave fast-restart and
>> bitmap-later in place.
>=20
> What I said at the start of this thread may have been lost somewhat =
over
> the course of this discussion:
>=20
>  At the point at which we make demand attach the default, rather than
>  optional behavior, I believe we should remove the code for these two
>  flags.  I think that should be for either 1.10 or 2.0 based on
>  experience with running 1.6 in production.  In the meantime, please =
be
>  aware that most of the developers don't build with those flags by
>  default and the code is not heavily tested.
>=20
> So there's no need to ask that the code be left in place as long as =
DAFS
> is an option that has to be enabled explicitly; we're not proposing =
doing
> anything differently.  :)

Touch=E9. But I wasn't asking to leave it in place as long as DAFS is =
optional. I was asking to leave it in place until DAFS is the one and =
only option.

Cheers,
	Stephan

--=20
Stephan Wiesand
DESY -DV-
Platanenenallee 6
15738 Zeuthen, Germany


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