1 git-multi-pack-index(1)
2 =======================
6 git-multi-pack-index - Write and verify multi-pack-indexes
12 'git multi-pack-index' [--object-dir=<dir>] [--[no-]bitmap] <sub-command>
16 Write or verify a multi-pack-index (MIDX) file.
22 Use given directory for the location of Git objects. We check
23 `<dir>/packs/multi-pack-index` for the current MIDX file, and
24 `<dir>/packs` for the pack-files to index.
26 `<dir>` must be an alternate of the current repository.
29 Turn progress on/off explicitly. If neither is specified, progress is
30 shown if standard error is connected to a terminal. Supported by
31 sub-commands `write`, `verify`, `expire`, and `repack.
33 The following subcommands are available:
36 Write a new MIDX file. The following options are available for
37 the `write` sub-command:
40 --preferred-pack=<pack>::
41 Optionally specify the tie-breaking pack used when
42 multiple packs contain the same object. `<pack>` must
43 contain at least one object. If not given, ties are
44 broken in favor of the pack with the lowest mtime.
47 Control whether or not a multi-pack bitmap is written.
50 Write a multi-pack index containing only the set of
51 line-delimited pack index basenames provided over stdin.
53 --refs-snapshot=<path>::
54 With `--bitmap`, optionally specify a file which
55 contains a "refs snapshot" taken prior to repacking.
57 A reference snapshot is composed of line-delimited OIDs corresponding to
58 the reference tips, usually taken by `git repack` prior to generating a
59 new pack. A line may optionally start with a `+` character to indicate
60 that the reference which corresponds to that OID is "preferred" (see
61 linkgit:git-config[1]'s `pack.preferBitmapTips`.)
63 The file given at `<path>` is expected to be readable, and can contain
64 duplicates. (If a given OID is given more than once, it is marked as
65 preferred if at least one instance of it begins with the special `+`
70 Verify the contents of the MIDX file.
73 Delete the pack-files that are tracked by the MIDX file, but
74 have no objects referenced by the MIDX. Rewrite the MIDX file
75 afterward to remove all references to these pack-files.
78 Create a new pack-file containing objects in small pack-files
79 referenced by the multi-pack-index. If the size given by the
80 `--batch-size=<size>` argument is zero, then create a pack
81 containing all objects referenced by the multi-pack-index. For
82 a non-zero batch size, Select the pack-files by examining packs
83 from oldest-to-newest, computing the "expected size" by counting
84 the number of objects in the pack referenced by the
85 multi-pack-index, then divide by the total number of objects in
86 the pack and multiply by the pack size. We select packs with
87 expected size below the batch size until the set of packs have
88 total expected size at least the batch size, or all pack-files
89 are considered. If only one pack-file is selected, then do
90 nothing. If a new pack-file is created, rewrite the
91 multi-pack-index to reference the new pack-file. A later run of
92 'git multi-pack-index expire' will delete the pack-files that
93 were part of this batch.
95 If `repack.packKeptObjects` is `false`, then any pack-files with an
96 associated `.keep` file will not be selected for the batch to repack.
102 * Write a MIDX file for the packfiles in the current `.git` directory.
104 -----------------------------------------------
105 $ git multi-pack-index write
106 -----------------------------------------------
108 * Write a MIDX file for the packfiles in the current `.git` directory with a
109 corresponding bitmap.
111 -------------------------------------------------------------
112 $ git multi-pack-index write --preferred-pack=<pack> --bitmap
113 -------------------------------------------------------------
115 * Write a MIDX file for the packfiles in an alternate object store.
117 -----------------------------------------------
118 $ git multi-pack-index --object-dir <alt> write
119 -----------------------------------------------
121 * Verify the MIDX file for the packfiles in the current `.git` directory.
123 -----------------------------------------------
124 $ git multi-pack-index verify
125 -----------------------------------------------
130 See link:technical/multi-pack-index.html[The Multi-Pack-Index Design
131 Document] and linkgit:gitformat-pack[5] for more information on the
132 multi-pack-index feature and its file format.
137 Part of the linkgit:git[1] suite