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Re: RFC: Flat directory for notes, or fan-out? Both!

From
Shawn O. Pearce <spearce@spearce.org>
Date
Feb 10, 2009, 16:48 UTC
Message-ID
<20090210164809.GO30949@spearce.org>
In-Reply-To
<7vprhqnv0c.fsf@gitster.siamese.dyndns.org>
Junio C Hamano <gitster@pobox.com> wrote:
Show 10 quoted lines
> 
> I could do a revert on 'master' if it is really needed, but I found that
> the above reasoning is a bit troublesome.  The thing is, if a tree to hold
> the notes would be huge to be unmanageable, then it would still be huge to
> be unmanageable if you split it into 256 pieces.
> 
> I'd rather prefer to see us first try to find a way to optimze the tree
> parser.  Maybe packv4 or Linus's binary search (which IIRC you declared
> would not work --- I recall I once thought about it myself but I do not
> recall what my conclusions were) play a role in it.

packv4 as proposed wouldn't help a notes tree. It relied on the fact that we'd have no more than 64k unique file names in a repository, and any name which overflowed that 64k limit would force its tree to be a canonical format tree, which is what we are trying to avoid here.

-- 
Shawn.
Previous: Junio C HamanoNext: Johannes Schindelin
Message 15 of 33 in “RFC: Flat directory for notes, or fan-out? Both!”
  1. Johannes SchindelinFeb 9, 2009
  2. Boyd Stephen Smith Jr.Feb 10, 2009
  3. Jeff KingFeb 10, 2009
  4. Boyd Stephen Smith Jr.Feb 11, 2009
  5. Linus TorvaldsFeb 11, 2009
  6. Sam VilainFeb 11, 2009
  7. Linus TorvaldsFeb 11, 2009
  8. Sam VilainFeb 11, 2009
  9. Johannes SchindelinFeb 11, 2009
  10. Jeff KingFeb 10, 2009
  11. Johannes SchindelinFeb 10, 2009
  12. Jeff KingFeb 10, 2009
  13. Johannes SchindelinFeb 10, 2009
  14. Junio C HamanoFeb 10, 2009
  15. Shawn O. PearceFeb 10, 2009
  16. Johannes SchindelinFeb 10, 2009
  17. Shawn O. PearceFeb 10, 2009
  18. Johannes SchindelinFeb 10, 2009
  19. Junio C HamanoFeb 10, 2009
  20. Shawn O. PearceFeb 10, 2009
  21. Johannes SchindelinFeb 10, 2009
  22. Thomas RastFeb 10, 2009
  23. Thomas RastFeb 10, 2009
  24. Junio C HamanoFeb 10, 2009
  25. Jeff KingFeb 11, 2009
  26. Johannes SchindelinFeb 11, 2009
  27. Junio C HamanoFeb 11, 2009
  28. Johannes SchindelinFeb 11, 2009
  29. Shawn O. PearceFeb 10, 2009
  30. Johannes SchindelinFeb 10, 2009
  31. Shawn O. PearceFeb 10, 2009
  32. Sam VilainFeb 11, 2009
  33. Sam VilainFeb 11, 2009

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