mirror of
https://github.com/git/git
synced 2024-08-25 02:35:46 +00:00
0f9e62e084
Borrow the bitmap index into packfiles from JGit to speed up enumeration of objects involved in a commit range without having to fully traverse the history. * jk/pack-bitmap: (26 commits) ewah: unconditionally ntohll ewah data ewah: support platforms that require aligned reads read-cache: use get_be32 instead of hand-rolled ntoh_l block-sha1: factor out get_be and put_be wrappers do not discard revindex when re-preparing packfiles pack-bitmap: implement optional name_hash cache t/perf: add tests for pack bitmaps t: add basic bitmap functionality tests count-objects: recognize .bitmap in garbage-checking repack: consider bitmaps when performing repacks repack: handle optional files created by pack-objects repack: turn exts array into array-of-struct repack: stop using magic number for ARRAY_SIZE(exts) pack-objects: implement bitmap writing rev-list: add bitmap mode to speed up object lists pack-objects: use bitmaps when packing objects pack-objects: split add_object_entry pack-bitmap: add support for bitmap indexes documentation: add documentation for the bitmap format ewah: compressed bitmap implementation ...
142 lines
4.8 KiB
Plaintext
142 lines
4.8 KiB
Plaintext
git-repack(1)
|
|
=============
|
|
|
|
NAME
|
|
----
|
|
git-repack - Pack unpacked objects in a repository
|
|
|
|
|
|
SYNOPSIS
|
|
--------
|
|
[verse]
|
|
'git repack' [-a] [-A] [-d] [-f] [-F] [-l] [-n] [-q] [-b] [--window=<n>] [--depth=<n>]
|
|
|
|
DESCRIPTION
|
|
-----------
|
|
|
|
This command is used to combine all objects that do not currently
|
|
reside in a "pack", into a pack. It can also be used to re-organize
|
|
existing packs into a single, more efficient pack.
|
|
|
|
A pack is a collection of objects, individually compressed, with
|
|
delta compression applied, stored in a single file, with an
|
|
associated index file.
|
|
|
|
Packs are used to reduce the load on mirror systems, backup
|
|
engines, disk storage, etc.
|
|
|
|
OPTIONS
|
|
-------
|
|
|
|
-a::
|
|
Instead of incrementally packing the unpacked objects,
|
|
pack everything referenced into a single pack.
|
|
Especially useful when packing a repository that is used
|
|
for private development. Use
|
|
with '-d'. This will clean up the objects that `git prune`
|
|
leaves behind, but `git fsck --full --dangling` shows as
|
|
dangling.
|
|
+
|
|
Note that users fetching over dumb protocols will have to fetch the
|
|
whole new pack in order to get any contained object, no matter how many
|
|
other objects in that pack they already have locally.
|
|
|
|
-A::
|
|
Same as `-a`, unless '-d' is used. Then any unreachable
|
|
objects in a previous pack become loose, unpacked objects,
|
|
instead of being left in the old pack. Unreachable objects
|
|
are never intentionally added to a pack, even when repacking.
|
|
This option prevents unreachable objects from being immediately
|
|
deleted by way of being left in the old pack and then
|
|
removed. Instead, the loose unreachable objects
|
|
will be pruned according to normal expiry rules
|
|
with the next 'git gc' invocation. See linkgit:git-gc[1].
|
|
|
|
-d::
|
|
After packing, if the newly created packs make some
|
|
existing packs redundant, remove the redundant packs.
|
|
Also run 'git prune-packed' to remove redundant
|
|
loose object files.
|
|
|
|
-l::
|
|
Pass the `--local` option to 'git pack-objects'. See
|
|
linkgit:git-pack-objects[1].
|
|
|
|
-f::
|
|
Pass the `--no-reuse-delta` option to `git-pack-objects`, see
|
|
linkgit:git-pack-objects[1].
|
|
|
|
-F::
|
|
Pass the `--no-reuse-object` option to `git-pack-objects`, see
|
|
linkgit:git-pack-objects[1].
|
|
|
|
-q::
|
|
Pass the `-q` option to 'git pack-objects'. See
|
|
linkgit:git-pack-objects[1].
|
|
|
|
-n::
|
|
Do not update the server information with
|
|
'git update-server-info'. This option skips
|
|
updating local catalog files needed to publish
|
|
this repository (or a direct copy of it)
|
|
over HTTP or FTP. See linkgit:git-update-server-info[1].
|
|
|
|
--window=<n>::
|
|
--depth=<n>::
|
|
These two options affect how the objects contained in the pack are
|
|
stored using delta compression. The objects are first internally
|
|
sorted by type, size and optionally names and compared against the
|
|
other objects within `--window` to see if using delta compression saves
|
|
space. `--depth` limits the maximum delta depth; making it too deep
|
|
affects the performance on the unpacker side, because delta data needs
|
|
to be applied that many times to get to the necessary object.
|
|
The default value for --window is 10 and --depth is 50.
|
|
|
|
--window-memory=<n>::
|
|
This option provides an additional limit on top of `--window`;
|
|
the window size will dynamically scale down so as to not take
|
|
up more than '<n>' bytes in memory. This is useful in
|
|
repositories with a mix of large and small objects to not run
|
|
out of memory with a large window, but still be able to take
|
|
advantage of the large window for the smaller objects. The
|
|
size can be suffixed with "k", "m", or "g".
|
|
`--window-memory=0` makes memory usage unlimited, which is the
|
|
default.
|
|
|
|
--max-pack-size=<n>::
|
|
Maximum size of each output pack file. The size can be suffixed with
|
|
"k", "m", or "g". The minimum size allowed is limited to 1 MiB.
|
|
If specified, multiple packfiles may be created.
|
|
The default is unlimited, unless the config variable
|
|
`pack.packSizeLimit` is set.
|
|
|
|
-b::
|
|
--write-bitmap-index::
|
|
Write a reachability bitmap index as part of the repack. This
|
|
only makes sense when used with `-a` or `-A`, as the bitmaps
|
|
must be able to refer to all reachable objects. This option
|
|
overrides the setting of `pack.writebitmaps`.
|
|
|
|
|
|
Configuration
|
|
-------------
|
|
|
|
By default, the command passes `--delta-base-offset` option to
|
|
'git pack-objects'; this typically results in slightly smaller packs,
|
|
but the generated packs are incompatible with versions of Git older than
|
|
version 1.4.4. If you need to share your repository with such ancient Git
|
|
versions, either directly or via the dumb http or rsync protocol, then you
|
|
need to set the configuration variable `repack.UseDeltaBaseOffset` to
|
|
"false" and repack. Access from old Git versions over the native protocol
|
|
is unaffected by this option as the conversion is performed on the fly
|
|
as needed in that case.
|
|
|
|
SEE ALSO
|
|
--------
|
|
linkgit:git-pack-objects[1]
|
|
linkgit:git-prune-packed[1]
|
|
|
|
GIT
|
|
---
|
|
Part of the linkgit:git[1] suite
|