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Re: [PATCH] pack-objects: use of version 3 delta is now optional.

From
Junio C Hamano <junkio@cox.net>
Date
Oct 17, 2006, 16:12 UTC
Message-ID
<7vodsakjkg.fsf@assigned-by-dhcp.cox.net>
In-Reply-To
<Pine.LNX.4.64.0610160929450.17085@xanadu.home>
Nicolas Pitre <nico@cam.org> writes:
Show 15 quoted lines
> On Sun, 15 Oct 2006, Linus Torvalds wrote:
>
>> Quite frankly, I wonder if the pure "copy size extension" (aka "v3") thing 
>> is really worth it at all. 
>> 
>> I mean, seriously, how much does it buy us? A couple of bytes per every 
>> 64kB of delta copied? And the downside is that you can't re-use the deltas 
>> with old clients and/or you have to re-create a "v2" delta at run-time 
>> from a v3 delta by inflating, fixing and deflating it.
>
>...
> In the mean time, if Junio adds the patch I posted yesterday advertising 
> the pack version capability over the native protocol then it'll help us 
> make things forward compatible if ever we decide to go with generating 
> packs v3 sooner.

I've thought about this, but we hopefully would have ofs-delta capability exchanged soon after 1.4.3, and that would be an enough advertisement that the client is recent enough; although it is technically incorrect to tie these two independent features together, the improvement between v2 and v3 is dubious so maybe that is the easiest.

Previous: Nicolas PitreNext: Nicolas Pitre
Message 15 of 22 in “Recent and near future backward incompatibilities”
  1. Junio C HamanoOct 15, 2006
  2. pack-objects: use of version 3 delta is now optional.Junio C Hamano, Oct 15, 2006
  3. Jakub NarebskiOct 15, 2006
  4. Nicolas PitreOct 15, 2006
  5. Junio C HamanoOct 15, 2006
  6. Jakub NarebskiOct 15, 2006
  7. Nicolas PitreOct 15, 2006
  8. Junio C HamanoOct 16, 2006
  9. Nicolas PitreOct 16, 2006
  10. Nicolas PitreOct 15, 2006
  11. A Large Angry SCMOct 15, 2006
  12. Nicolas PitreOct 16, 2006
  13. Linus TorvaldsOct 15, 2006
  14. Nicolas PitreOct 16, 2006
  15. Junio C HamanoOct 17, 2006
  16. Nicolas PitreOct 17, 2006
  17. A Large Angry SCMOct 15, 2006
  18. Nicolas PitreOct 15, 2006
  19. Junio C HamanoOct 15, 2006
  20. Theodore TsoOct 15, 2006
  21. Linus TorvaldsOct 15, 2006
  22. Stephen HemmingerOct 16, 2006

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