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Re: [PATCH 17/32] read-cache: split-index mode

From
Junio C Hamano <gitster@pobox.com>
Date
Apr 30, 2014, 13:57 UTC
Message-ID
<xmqq38guj4xk.fsf@gitster.dls.corp.google.com>
In-Reply-To
<CACsJy8Da=n+kh8_bUkJ11-dK09A6zOMnhBQJCsPCWcCJ2mY0pw@mail.gmail.com>
Duy Nguyen <pclouds@gmail.com> writes:
> when no entry is reused). I kinda hope to avoid that.
I see.
Show 6 quoted lines
> Speaking about
> reusing cache_entry, we won't be able to share cache_entry because
> when it's freed in replace_index_entry, or remove_index_entry_at in
> the main index, we need to locate the same entry in the shared index
> as well and remove that stale pointer. Without sharing, we nearly
> double memory usage from the beginning.

Yeah, the point being to have most of the entries come from the base one, it is expected the real one and the saved base one will be mostly the same, so sharing is really necessary.

Previous: Duy NguyenNext: Nguyễn Thái Ngọc Duy
Message 23 of 75 in “Split index mode for very large indexes”
  1. 00/32 Split index mode for very large indexesNguyễn Thái Ngọc Duy, Apr 28, 2014
  2. 01/32 ewah: fix constness of ewah_read_mmapNguyễn Thái Ngọc Duy, Apr 28, 2014
  3. 02/32 ewah: delete unused ewah_read_mmap_native declarationNguyễn Thái Ngọc Duy, Apr 28, 2014
  4. 03/32 sequencer: do not update/refresh index if the lock cannot be heldNguyễn Thái Ngọc Duy, Apr 28, 2014
  5. 04/32 read-cache: new API write_locked_index instead of write_index/write_cacheNguyễn Thái Ngọc Duy, Apr 28, 2014
  6. 05/32 read-cache: relocate and unexport commit_locked_index()Nguyễn Thái Ngọc Duy, Apr 28, 2014
  7. 06/32 read-cache: store in-memory flags in the first 12 bits of ce_flagsNguyễn Thái Ngọc Duy, Apr 28, 2014
  8. 07/32 read-cache: be strict about "changed" in remove_marked_cache_entries()Nguyễn Thái Ngọc Duy, Apr 28, 2014
  9. 08/32 read-cache: be specific what part of the index has changedNguyễn Thái Ngọc Duy, Apr 28, 2014
  10. 09/32 update-index: be specific what part of the index has changedNguyễn Thái Ngọc Duy, Apr 28, 2014
  11. 10/32 resolve-undo: be specific what part of the index has changedNguyễn Thái Ngọc Duy, Apr 28, 2014
  12. 11/32 unpack-trees: be specific what part of the index has changedNguyễn Thái Ngọc Duy, Apr 28, 2014
  13. 12/32 cache-tree: mark istate->cache_changed on cache tree invalidationNguyễn Thái Ngọc Duy, Apr 28, 2014
  14. 13/32 cache-tree: mark istate->cache_changed on cache tree updateNguyễn Thái Ngọc Duy, Apr 28, 2014
  15. 14/32 cache-tree: mark istate->cache_changed on prime_cache_tree()Nguyễn Thái Ngọc Duy, Apr 28, 2014
  16. 15/32 entry.c: update cache_changed if refresh_cache is set in checkout_entry()Nguyễn Thái Ngọc Duy, Apr 28, 2014
  17. 16/32 read-cache: save index SHA-1 after readingNguyễn Thái Ngọc Duy, Apr 28, 2014
  18. 17/32 read-cache: split-index modeNguyễn Thái Ngọc Duy, Apr 28, 2014
  19. Junio C HamanoApr 28, 2014
  20. Duy NguyenApr 29, 2014
  21. Junio C HamanoApr 29, 2014
  22. Duy NguyenApr 29, 2014
  23. Junio C HamanoApr 30, 2014
  24. 18/32 read-cache: mark new entries for split indexNguyễn Thái Ngọc Duy, Apr 28, 2014
  25. Eric SunshineApr 30, 2014
  26. 19/32 read-cache: save deleted entries in split indexNguyễn Thái Ngọc Duy, Apr 28, 2014
  27. 20/32 read-cache: mark updated entries for split indexNguyễn Thái Ngọc Duy, Apr 28, 2014
  28. 21/32 split-index: the writing partNguyễn Thái Ngọc Duy, Apr 28, 2014
  29. 22/32 split-index: the reading partNguyễn Thái Ngọc Duy, Apr 28, 2014
  30. 23/32 split-index: do not invalidate cache-tree at read timeNguyễn Thái Ngọc Duy, Apr 28, 2014
  31. 24/32 split-index: strip pathname of on-disk replaced entriesNguyễn Thái Ngọc Duy, Apr 28, 2014
  32. Junio C HamanoApr 29, 2014
  33. 25/32 update-index: new options to enable/disable split index modeNguyễn Thái Ngọc Duy, Apr 28, 2014
  34. 26/32 update-index --split-index: do not split if $GIT_DIR is read onlyNguyễn Thái Ngọc Duy, Apr 28, 2014
  35. 27/32 rev-parse: add --shared-index-path to get shared index pathNguyễn Thái Ngọc Duy, Apr 28, 2014
  36. 28/32 read-tree: force split-index mode off on --index-outputNguyễn Thái Ngọc Duy, Apr 28, 2014
  37. 29/32 read-tree: note about dropping split-index mode or index versionNguyễn Thái Ngọc Duy, Apr 28, 2014
  38. 30/32 read-cache: force split index mode with GIT_TEST_SPLIT_INDEXNguyễn Thái Ngọc Duy, Apr 28, 2014
  39. 31/32 t2104: make sure split index mode is off for the version testNguyễn Thái Ngọc Duy, Apr 28, 2014
  40. 32/32 t1700: new tests for split-index modeNguyễn Thái Ngọc Duy, Apr 28, 2014
  41. Shawn PearceApr 28, 2014
  42. Duy NguyenApr 29, 2014
  43. Duy NguyenMay 9, 2014
  44. Junio C HamanoMay 9, 2014
  45. 0/8 Speed up cache loading timeNguyễn Thái Ngọc Duy, May 13, 2014
  46. 1/8 read-cache: allow to keep mmap'd memory after readingNguyễn Thái Ngọc Duy, May 13, 2014
  47. 2/3 Add read-cache--daemonNguyễn Thái Ngọc Duy, May 13, 2014
  48. Erik Faye-LundMay 13, 2014
  49. Duy NguyenMay 13, 2014
  50. Duy NguyenMay 13, 2014
  51. Erik Faye-LundMay 13, 2014
  52. Duy NguyenMay 13, 2014
  53. Erik Faye-LundMay 13, 2014
  54. Duy NguyenMay 13, 2014
  55. Erik Faye-LundMay 13, 2014
  56. 2/8 unix-socket: stub impl. for platforms with no unix socket supportNguyễn Thái Ngọc Duy, May 13, 2014
  57. Erik Faye-LundMay 13, 2014
  58. Erik Faye-LundMay 13, 2014
  59. 3/8 daemonize: set a flag before exiting the main processNguyễn Thái Ngọc Duy, May 13, 2014
  60. 3/3 read-cache: try index data from shared memoryNguyễn Thái Ngọc Duy, May 13, 2014
  61. 4/8 Add read-cache--daemon for caching index and related stuffNguyễn Thái Ngọc Duy, May 13, 2014
  62. Erik Faye-LundMay 13, 2014
  63. 5/8 read-cache: try index data from shared memoryNguyễn Thái Ngọc Duy, May 13, 2014
  64. Erik Faye-LundMay 13, 2014
  65. 6/8 read-cache--daemon: do not read index from shared memoryNguyễn Thái Ngọc Duy, May 13, 2014
  66. 7/8 read-cache: skip verifying trailing SHA-1 on cached indexNguyễn Thái Ngọc Duy, May 13, 2014
  67. 8/8 read-cache: inform the daemon that the index has been updatedNguyễn Thái Ngọc Duy, May 13, 2014
  68. Erik Faye-LundMay 13, 2014
  69. David TurnerMay 22, 2014
  70. Stefan BellerMay 13, 2014
  71. Duy NguyenMay 13, 2014
  72. 9/8 even faster loading time with index version 254Nguyễn Thái Ngọc Duy, May 13, 2014
  73. Junio C HamanoApr 28, 2014
  74. Richard HansenApr 30, 2014
  75. Duy NguyenMay 1, 2014

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