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Re: support for large packs and 64-bit offsets

From
Junio C Hamano <junkio@cox.net>
Date
Apr 9, 2007, 19:49 UTC
Message-ID
<7vtzvpz5tu.fsf@assigned-by-dhcp.cox.net>
In-Reply-To
<20070409174305.GU5436@spearce.org>
"Shawn O. Pearce" <spearce@spearce.org> writes:
Show 8 quoted lines
> Nicolas Pitre <nico@cam.org> wrote:
> ...
> Here's something we didn't think about, but that occurred to me today
> when reading this series: If we move the SHA-1 table out of the index
> and into the packfile (like we are planning) dumb commit-walkers
> (http-fetch) will have problems.  Right now they download the
> indexes of every available packfile to determine if they need to
> download the corresponding packfile to obtain a needed object.

If we really care about older dumb clients, one option is to generate not .idx but .idx2, and have a corresponding .idx only to support them. But at that point, it's probably cleaner to have an explicit option to produce .idx file of a particular version, and tell people to pack public repositories they expect older dumb clients to access with that option to keep things backward compatible.

Previous: Shawn O. PearceNext: Shawn O. Pearce
Message 17 of 24 in “support for large packs and 64-bit offsets”
  1. Nicolas PitreApr 9, 2007
  2. 01/10 get rid of num_packed_objects()Nicolas Pitre, Apr 9, 2007
  3. 02/10 make overflow test on delta base offset work regardless of variable sizeNicolas Pitre, Apr 9, 2007
  4. 03/10 add overflow tests on pack offset variablesNicolas Pitre, Apr 9, 2007
  5. 04/10 compute a CRC32 for each object as stored in a packNicolas Pitre, Apr 9, 2007
  6. 05/10 compute object CRC32 with index-packNicolas Pitre, Apr 9, 2007
  7. 06/10 pack-objects: learn about pack index version 2Nicolas Pitre, Apr 9, 2007
  8. 07/10 index-pack: learn about pack index version 2Nicolas Pitre, Apr 9, 2007
  9. 08/10 sha1_file.c: learn about index version 2Nicolas Pitre, Apr 9, 2007
  10. 09/10 show-index.c: learn about index v2Nicolas Pitre, Apr 9, 2007
  11. 10/10 pack-redundant.c: learn about index v2Nicolas Pitre, Apr 9, 2007
  12. Junio C HamanoApr 9, 2007
  13. Nicolas PitreApr 9, 2007
  14. Shawn O. PearceApr 9, 2007
  15. Nicolas PitreApr 9, 2007
  16. Shawn O. PearceApr 9, 2007
  17. Junio C HamanoApr 9, 2007
  18. Shawn O. PearceApr 9, 2007
  19. Nicolas PitreApr 9, 2007
  20. Junio C HamanoApr 9, 2007
  21. Linus TorvaldsApr 9, 2007
  22. Nicolas PitreApr 9, 2007
  23. Shawn O. PearceApr 9, 2007
  24. Nicolas PitreApr 9, 2007

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