14 Sep
2019
14 Sep
'19
7:55 a.m.
On Sat, Sep 14, 2019 at 01:03:12AM +0200, Steffen Nurpmeso wrote:
He is as convinced from SCCS and its interleaved
deltas as you
are, but he works on extending the plain original SCCS, which is
pretty smaller; his presentation from the "Chemnitzer Linux Tage
2012" (linux days of former Karl-Marx-Stadt) [1] talks about this
and also prominently mentions BitKeeper:
. All modern distributed OSS version control systems base upon
BitKeeper in the end.
Sort of. Monotone, Darcs, and one other one I can't remember did not
draw from BitKeeper. Mercurial, Git, and the Australian one that I
can't remember definitely do.
. BitKeeper bases upon the ideas of TeamWare.
Only in that I am the primary author of both. It does support the idea
that SCCS is the basis for both, though Teamware used the real SCCS and
I rewrote SCCS from scratch and then extended it quite a bit. BitKeeper's
SCCS tracks a lot more than SCCS does, pathnames, permissions, hostnames,
etc.
. TeamWare bases upon the ideas of NSE.
That's absolutely false. TeamWare, which is the productized version
of NSElite, which I wrote all of, was a reaction to how absolute shiite
NSE was. I had friends in the Sun kernel group that quit because they
were forced to use NSE. It was awful. I got into source management
because I was well known at Sun as the guy that could fix performance
problems so I was asked to look at NSE. One look told me that I couldn't
fix NSE but the source management problem space needed some help.
. NSE is a frontend to SCCS.
That's true.
. Therewith all modern systems ultimately base upon
SCCS.
That is a big stretch, it's just not true. I love the SCCS file
format but to say all modern systems are based on SCCS is 100%
false. BitKeeper is. That's it.
. Distributed operate TeamWare, BitKeeper, git,
Mercurial.
Git and Mercurial were going for append only data structures.
That's not SCCS.
All this comes from Jorg, isn't he the guy who has a track record of
being on the outside of Sun and trying to argue with me about what Sun
was doing when I was a well known guy in the most important group at Sun,
the kernel group. If so, I'd salt his stuff heavily.
I think he means well but is a little out there. Though some people
might say the same about me.
--lm