NAME¶
git-repack - Pack unpacked objects in a repository
SYNOPSIS¶
git repack [-a] [-A] [-d] [-f] [-l] [-n] [-q] [--window=N]
[--depth=N]
DESCRIPTION¶
This script 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
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
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
-f
-q
-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
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.
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.
AUTHOR¶
Written by Linus Torvalds <torvalds@osdl.org[1]>
DOCUMENTATION¶
Documentation by Ryan Anderson
<ryan@michonline.com[2]>
NOTES¶
- 1.
- torvalds@osdl.org
mailto:torvalds@osdl.org
- 2.
- ryan@michonline.com
mailto:ryan@michonline.com