git-multi-pack-index - Write and verify multi-pack-indexes
git multi-pack-index [--object-dir=<dir>] [--[no-]bitmap] <sub-command>
Write or verify a multi-pack-index (MIDX) file.
--object-dir=<dir>
Use given directory for the location of Git objects. We
check
<dir>/packs/multi-pack-index for the current MIDX file, and
<dir>/packs for the pack-files to index.
<dir> must be an alternate of the current
repository.
--[no-]progress
Turn progress on/off explicitly. If neither is specified,
progress is shown if standard error is connected to a terminal. Supported by
sub-commands write, verify, expire, and `repack.
The following subcommands are available:
write
Write a new MIDX file. The following options are
available for the
write sub-command:
--preferred-pack=<pack>
Optionally specify the tie-breaking pack used when
multiple packs contain the same object. <pack> must contain at
least one object. If not given, ties are broken in favor of the pack with the
lowest mtime.
--[no-]bitmap
Control whether or not a multi-pack bitmap is
written.
--stdin-packs
Write a multi-pack index containing only the set of
line-delimited pack index basenames provided over stdin.
--refs-snapshot=<path>
With
--bitmap, optionally specify a file which
contains a "refs snapshot" taken prior to repacking.
A reference snapshot is composed of line-delimited OIDs
corresponding to the reference tips, usually taken by git repack
prior to generating a new pack. A line may optionally start with a +
character to indicate that the reference which corresponds to that OID is
"preferred" (see git-config(1)'s
pack.preferBitmapTips.)
The file given at <path> is expected to be readable,
and can contain duplicates. (If a given OID is given more than once, it is
marked as preferred if at least one instance of it begins with the special
+ marker).
verify
Verify the contents of the MIDX file.
expire
Delete the pack-files that are tracked by the MIDX file,
but have no objects referenced by the MIDX (with the exception of .keep
packs and cruft packs). Rewrite the MIDX file afterward to remove all
references to these pack-files.
repack
Create a new pack-file containing objects in small
pack-files referenced by the multi-pack-index. If the size given by the
--batch-size=<size> argument is zero, then create a pack
containing all objects referenced by the multi-pack-index. For a non-zero
batch size, Select the pack-files by examining packs from oldest-to-newest,
computing the "expected size" by counting the number of objects in
the pack referenced by the multi-pack-index, then divide by the total number
of objects in the pack and multiply by the pack size. We select packs with
expected size below the batch size until the set of packs have total expected
size at least the batch size, or all pack-files are considered. If only one
pack-file is selected, then do nothing. If a new pack-file is created, rewrite
the multi-pack-index to reference the new pack-file. A later run of
git
multi-pack-index expire will delete the pack-files that were part of this
batch.
If repack.packKeptObjects is false, then any
pack-files with an associated .keep file will not be selected for the
batch to repack.
•Write a MIDX file for the packfiles in the
current
.git directory.
$ git multi-pack-index write
•Write a MIDX file for the packfiles in the
current
.git directory with a corresponding bitmap.
$ git multi-pack-index write --preferred-pack=<pack> --bitmap
•Write a MIDX file for the packfiles in an
alternate object store.
$ git multi-pack-index --object-dir <alt> write
•Verify the MIDX file for the packfiles in the
current
.git directory.
$ git multi-pack-index verify
See The Multi-Pack-Index Design Document[1] and
gitformat-pack(5) for more information on the multi-pack-index
feature and its file format.
- 1.
- The Multi-Pack-Index Design Document
git-htmldocs/technical/multi-pack-index.html