Looking ahead: proposed Hg forest consolidation for JDK 10

[Andrew Hughes]

----- Original Message -----
> On 10/12/2016 9:25 AM, Andrew Hughes wrote:
> >
> > ----- Original Message -----
> >> snip...
> >>
> >>
> 
> [snip]
> 
> > Further to that, for OpenJDK 8, the relative repo sizes look like
> > this (compressed):
> >
> > -rw-r--r-- 1 andrew users 918K Aug  7 18:20 corba.tar.xz
> > -rw-r--r-- 1 andrew users 6.5M Aug  7 18:22 hotspot.tar.xz
> > -rw-r--r-- 1 andrew users 2.2M Aug  7 18:21 jaxp.tar.xz
> > -rw-r--r-- 1 andrew users 2.2M Aug  7 18:21 jaxws.tar.xz
> > -rw-r--r-- 1 andrew users  38M Aug  7 18:23 jdk.tar.xz
> > -rw-r--r-- 1 andrew users 2.0M Aug  7 18:21 langtools.tar.xz
> > -rw-r--r-- 1 andrew users 2.2M Aug  7 18:25 nashorn.tar.xz
> > -rw-r--r-- 1 andrew users 327K Aug  7 18:20 openjdk.tar.xz
> >
> > The JDK repository, even compressed, is over five times the size
> > of HotSpot. Adding the other repos into the JDK repository thus
> > wouldn't make that much of a difference to it, even if HotSpot is
> > included, whereas it will cause an order of magnitude increase compared
> > to the current side of the HotSpot repositories.
> >
> > I think I'd thus prefer to see it cut down to two repositories. That
> > would give most of the benefits I described of getting rid of all
> > the superfluous repos, without bloating the requirements for HotSpot work.
> 
> Of course a consequence of a hotspot + everything else arrangement be
> perpetuating the current inability to make atomic HotSpot + JDK changes.
> 

Yeah, I'm aware of that. That's why I'm wondering what percentage of cross-repo
commits include both HotSpot and some JDK repository. I do take on board the point
made elsewhere that they become more likely if they are less problematic.

I just think it's going to have a big impact for people working solely on HotSpot
and so it needs to be clearly beneficial.

> Cheers,
> 
> -Joe
> 

-- 
Andrew :)

Senior Free Java Software Engineer
Red Hat, Inc. (http://www.redhat.com)

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