From: Ted Ts'o <tytso@mit.edu>
Date: Thu, 14 Jul 2011 19:46:38 GMT
Subject: Re: Git commit generation numbers
Message-ID: <20110714194638.GE8453@thunk.org>
In-Reply-To: <CA+55aFzvib7QF-J3fBj2brcQifXGqoeK1t7vfx6pcJmJAEO0dw@mail.gmail.com>

On Thu, Jul 14, 2011 at 11:55:39AM -0700, Linus Torvalds wrote:
> On Thu, Jul 14, 2011 at 11:47 AM, Linus Torvalds
> <torvalds@linux-foundation.org> wrote:
> >
> > Also, I suspect that the cache could easily be done as a *small* and
> > *incomplete* cache, ie you don't need to cache all commits, it would
> > be sufficient to cache a few hundred spread-out commits, and just know
> > that "from any commit, the cached commit will be quickly reachable".
> 
> Put another way: we could do the cache not as a real dynamic entity,
> but as something that gets generated at "git clone" time or when
> re-packing.

Would it be considered evil if we put the generation number in the
pack, but not consider it part of the formal object (i.e., it would be
just a cache, but one that wouldn't change once the pack was created)?

       	      	      	   	    	   	- Ted