git/list[1] front-page[2] threads[3] people[4] search[5] about
 

Re: [PATCH 1/2] builtin/repack.c: simplify cruft pack aggregation

From
Taylor Blau <me@ttaylorr.com>
Date
Feb 27, 2025, 22:53 UTC
Message-ID
<Z8Ds206MUMQzqGB6@nand.local>
In-Reply-To
<CABPp-BE9=WUv1typWB7JB4HvP04Q_Bh6h23D=LzcpsAsggQ+7A@mail.gmail.com>
On Thu, Feb 27, 2025 at 11:23:02AM -0800, Elijah Newren wrote:
Show 16 quoted lines
> > The original idea behind this approach was that smaller cruft packs
> > would get combined together until the sum of their sizes was no larger
> > than the given max pack size.
> >
> > There is a much simpler way to achieve this, however, which is to simply
> > combine *all* cruft packs which are smaller than the threshold,
> > regardless of what their sum is. With '--max-pack-size', 'pack-objects'
> > will split out the resulting pack into individual pack(s) if necessary
> > to ensure that the written pack(s) are each no larger than the provided
> > threshold.
>
> That doesn't really "achieve this" though, unless the antecedent of
> "this" isn't what was described in the previous paragraph but
> something elsewhere.  I suspect your actual meaning was something
> along the lines of "There is a much simpler way to combine cruft
> packs, however, which..." ?

Great suggestion, thanks. I swapped out "achieve this" for your recommendation.

Show 7 quoted lines
> > This yields a slight behavior change, which is reflected in the removed
> > test. Previous to this change, we would aggregate smaller cruft packs
> > first, whereas now we will opportunistically combine as many cruft packs
> > as possible. As as result, that test is no longer relevant, and can be
> > deleted.
>
> I like the idea, since it sounds like it should be simpler...

Heh. I don't know why I wrote it the way it was originally. I wrote the second patch in this series first, and when I was trying to explain how multi-cruft pack aggregation works I paused and then wrote what is now the first patch.

Hindsight is 20/20, I suppose ;-).

Thanks, Taylor

Previous: Elijah NewrenNext: Patrick Steinhardt
Message 4 of 54 in “pack-objects: freshen objects with multi-cruft packs”
  1. 0/2 pack-objects: freshen objects with multi-cruft packsTaylor Blau, Feb 27, 2025
  2. 1/2 builtin/repack.c: simplify cruft pack aggregationTaylor Blau, Feb 27, 2025
  3. Elijah NewrenFeb 27, 2025
  4. Taylor BlauFeb 27, 2025
  5. Patrick SteinhardtFeb 28, 2025
  6. Elijah NewrenMar 4, 2025
  7. Junio C HamanoMar 5, 2025
  8. Taylor BlauMar 5, 2025
  9. 2/2 builtin/pack-objects.c: freshen objects from existing cruft packsTaylor Blau, Feb 27, 2025
  10. Elijah NewrenFeb 27, 2025
  11. Taylor BlauFeb 27, 2025
  12. Elijah NewrenFeb 27, 2025
  13. Taylor BlauFeb 27, 2025
  14. 0/2 pack-objects: freshen objects with multi-cruft packsTaylor Blau, Mar 4, 2025
  15. 1/2 builtin/repack.c: simplify cruft pack aggregationTaylor Blau, Mar 4, 2025
  16. 2/2 builtin/pack-objects.c: freshen objects from existing cruft packsTaylor Blau, Mar 4, 2025
  17. Elijah NewrenMar 4, 2025
  18. Taylor BlauMar 5, 2025
  19. Taylor BlauMar 5, 2025
  20. 0/1 pack-objects: freshen objects with multi-cruft packsTaylor Blau, Mar 5, 2025
  21. 1/1 builtin/pack-objects.c: freshen objects from existing cruft packsTaylor Blau, Mar 5, 2025
  22. Patrick SteinhardtMar 6, 2025
  23. Taylor BlauMar 13, 2025
  24. Patrick SteinhardtMar 6, 2025
  25. 0/6 pack-objects: freshen objects with multi-cruft packsTaylor Blau, Mar 11, 2025
  26. 1/6 t/t5329-pack-objects-cruft.sh: evict 'repack'-related testsTaylor Blau, Mar 11, 2025
  27. 2/6 t7704-repack-cruft.sh: consolidate `write_blob()`Taylor Blau, Mar 11, 2025
  28. 3/6 t/lib-cruft.sh: extract some cruft-related helpersTaylor Blau, Mar 11, 2025
  29. 4/6 pack-objects: generate cruft packs at most one object over thresholdTaylor Blau, Mar 11, 2025
  30. Junio C HamanoMar 11, 2025
  31. Taylor BlauMar 12, 2025
  32. Junio C HamanoMar 12, 2025
  33. Taylor BlauMar 12, 2025
  34. Elijah NewrenMar 12, 2025
  35. Taylor BlauMar 12, 2025
  36. Junio C HamanoMar 12, 2025
  37. Elijah NewrenMar 12, 2025
  38. Junio C HamanoMar 13, 2025
  39. Elijah NewrenMar 13, 2025
  40. Junio C HamanoMar 13, 2025
  41. 5/6 builtin/repack.c: simplify cruft pack aggregationTaylor Blau, Mar 11, 2025
  42. 6/6 builtin/pack-objects.c: freshen objects from existing cruft packsTaylor Blau, Mar 11, 2025
  43. Junio C HamanoMar 11, 2025
  44. Taylor BlauMar 12, 2025
  45. Junio C HamanoMar 12, 2025
  46. Taylor BlauMar 12, 2025
  47. Junio C HamanoMar 12, 2025
  48. Taylor BlauMar 12, 2025
  49. Junio C HamanoMar 13, 2025
  50. Taylor BlauMar 13, 2025
  51. Jeff KingMar 13, 2025
  52. Junio C HamanoMar 13, 2025
  53. builtin/pack-objects.c: freshen objects from existing cruft packsTaylor Blau, Mar 13, 2025
  54. Junio C HamanoMar 13, 2025

Read the whole thread, see it on lore, or plain text.

$ cat FOOTERMessages come from the public archive at lore.kernel.org/git, fetched every hour. The front page is chosen and written each morning by an AI editor and can be wrong; the threads themselves are the record. About and API. For agents: an MCP server at https://gitlist.dev/mcp, and any thread, story or person page as Markdown by adding .md to its URL (or sending Accept: text/markdown). Details in /llms.txt.