dvfs api and toolkits

[Nate Nielsen]

Sean Middleditch wrote:
> The options for D-VFS 1.0 are pretty much: (a) no seeking, (b) seeking
> only for file systems with solid dependable support for it, or (c)
> seeking everywhere using inefficient emulation where needed.  Even if we
> go with (a), applications can special case file:/// URIs and just use
> POSIX if they need some special capability that isn't in D-VFS (yet).

FWIW, I'd suggest the (b) option.

> Something we can figure out once we have real code, I guess.  Right now
> all this speculation isn't helping - it's not a clear cut issue, and I
> don't think it's something we can make a firm decision on at this point.

Yes agreed. Although we need to be aware of these future requirements
somewhere in the back of our minds, so we don't paint ourselves into a
corner.

Cheers,
Nate