git-repack.html - external/gitster/git-htmldocs - Git at Google

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 <title>git-repack(1)</title>
 </head>
 <body>
 <div id="header">
 <h1>
 git-repack(1) Manual Page
 </h1>
 <h2>NAME</h2>
 <div class="sectionbody">
 <p>git-repack -
  Pack unpacked objects in a repository
 </p>
 </div>
 </div>
 <h2>SYNOPSIS</h2>
 <div class="sectionbody">
 <div class="para"><p><em>git repack</em> [-a] [-A] [-d] [-f] [-l] [-n] [-q] [--window=N] [--depth=N]</p></div>
 </div>
 <h2 id="_description">DESCRIPTION</h2>
 <div class="sectionbody">
 <div class="para"><p>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.</p></div>
 <div class="para"><p>A pack is a collection of objects, individually compressed, with
 delta compression applied, stored in a single file, with an
 associated index file.</p></div>
 <div class="para"><p>Packs are used to reduce the load on mirror systems, backup
 engines, disk storage, etc.</p></div>
 </div>
 <h2 id="_options">OPTIONS</h2>
 <div class="sectionbody">
 <div class="vlist"><dl>
 <dt>
 -a
 </dt>
 <dd>
 <p>
  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 and there is no need to worry
  about people fetching via dumb protocols from it. Use
  with <em>-d</em>. This will clean up the objects that <tt>git prune</tt>
  leaves behind, but <tt>git fsck --full</tt> shows as
  dangling.
 </p>
 </dd>
 <dt>
 -A
 </dt>
 <dd>
 <p>
  Same as <tt>-a</tt>, unless <em>-d</em> 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 <em>git-gc</em> invocation. See <a href="git-gc.html">git-gc(1)</a>.
 </p>
 </dd>
 <dt>
 -d
 </dt>
 <dd>
 <p>
  After packing, if the newly created packs make some
  existing packs redundant, remove the redundant packs.
  Also run <em>git-prune-packed</em> to remove redundant
  loose object files.
 </p>
 </dd>
 <dt>
 -l
 </dt>
 <dd>
 <p>
  Pass the <tt>--local</tt> option to <em>git-pack-objects</em>. See
  <a href="git-pack-objects.html">git-pack-objects(1)</a>.
 </p>
 </dd>
 <dt>
 -f
 </dt>
 <dd>
 <p>
  Pass the <tt>--no-reuse-object</tt> option to <tt>git-pack-objects</tt>, see
  <a href="git-pack-objects.html">git-pack-objects(1)</a>.
 </p>
 </dd>
 <dt>
 -q
 </dt>
 <dd>
 <p>
  Pass the <tt>-q</tt> option to <em>git-pack-objects</em>. See
  <a href="git-pack-objects.html">git-pack-objects(1)</a>.
 </p>
 </dd>
 <dt>
 -n
 </dt>
 <dd>
 <p>
  Do not update the server information with
  <em>git-update-server-info</em>. This option skips
  updating local catalog files needed to publish
  this repository (or a direct copy of it)
  over HTTP or FTP. See <a href="git-update-server-info.html">git-update-server-info(1)</a>.
 </p>
 </dd>
 <dt>
 --window=[N]
 </dt>
 <dt>
 --depth=[N]
 </dt>
 <dd>
 <p>
  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 <tt>--window</tt> to see if using delta compression saves
  space. <tt>--depth</tt> 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.
 </p>
 </dd>
 <dt>
 --window-memory=[N]
 </dt>
 <dd>
 <p>
  This option provides an additional limit on top of <tt>--window</tt>;
  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".
  <tt>--window-memory=0</tt> makes memory usage unlimited, which is the
  default.
 </p>
 </dd>
 <dt>
 --max-pack-size=&lt;n&gt;
 </dt>
 <dd>
 <p>
  Maximum size of each output packfile, expressed in MiB.
  If specified, multiple packfiles may be created.
  The default is unlimited.
 </p>
 </dd>
 </dl></div>
 </div>
 <h2 id="_configuration">Configuration</h2>
 <div class="sectionbody">
 <div class="para"><p>When configuration variable <tt>repack.UseDeltaBaseOffset</tt> is set
 for the repository, the command passes <tt>--delta-base-offset</tt>
 option to <em>git-pack-objects</em>; this typically results in slightly
 smaller packs, but the generated packs are incompatible with
 versions of git older than (and including) v1.4.3; do not set
 the variable in a repository that older version of git needs to
 be able to read (this includes repositories from which packs can
 be copied out over http or rsync, and people who obtained packs
 that way can try to use older git with it).</p></div>
 </div>
 <h2 id="_author">Author</h2>
 <div class="sectionbody">
 <div class="para"><p>Written by Linus Torvalds &lt;torvalds@osdl.org&gt;</p></div>
 </div>
 <h2 id="_documentation">Documentation</h2>
 <div class="sectionbody">
 <div class="para"><p>Documentation by Ryan Anderson &lt;ryan@michonline.com&gt;</p></div>
 </div>
 <h2 id="_see_also">SEE ALSO</h2>
 <div class="sectionbody">
 <div class="para"><p><a href="git-pack-objects.html">git-pack-objects(1)</a>
 <a href="git-prune-packed.html">git-prune-packed(1)</a></p></div>
 </div>
 <h2 id="_git">GIT</h2>
 <div class="sectionbody">
 <div class="para"><p>Part of the <a href="git.html">git(1)</a> suite</p></div>
 </div>
 <div id="footer">
 <div id="footer-text">
 Last updated 2009-04-02 06:50:01 UTC
 </div>
 </div>
 </body>
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	</style>
	<title>git-repack(1)</title>
	</head>
	<body>
	<div id="header">
	<h1>
	git-repack(1) Manual Page
	</h1>
	<h2>NAME</h2>
	<div class="sectionbody">
	<p>git-repack -
	Pack unpacked objects in a repository
	</p>
	</div>
	</div>
	<h2>SYNOPSIS</h2>
	<div class="sectionbody">
	<div class="para"><p><em>git repack</em> [-a] [-A] [-d] [-f] [-l] [-n] [-q] [--window=N] [--depth=N]</p></div>
	</div>
	<h2 id="_description">DESCRIPTION</h2>
	<div class="sectionbody">
	<div class="para"><p>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.</p></div>
	<div class="para"><p>A pack is a collection of objects, individually compressed, with
	delta compression applied, stored in a single file, with an
	associated index file.</p></div>
	<div class="para"><p>Packs are used to reduce the load on mirror systems, backup
	engines, disk storage, etc.</p></div>
	</div>
	<h2 id="_options">OPTIONS</h2>
	<div class="sectionbody">
	<div class="vlist"><dl>
	<dt>
	-a
	</dt>
	<dd>
	<p>
	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 and there is no need to worry
	about people fetching via dumb protocols from it. Use
	with <em>-d</em>. This will clean up the objects that <tt>git prune</tt>
	leaves behind, but <tt>git fsck --full</tt> shows as
	dangling.
	</p>
	</dd>
	<dt>
	-A
	</dt>
	<dd>
	<p>
	Same as <tt>-a</tt>, unless <em>-d</em> 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 <em>git-gc</em> invocation. See <a href="git-gc.html">git-gc(1)</a>.
	</p>
	</dd>
	<dt>
	-d
	</dt>
	<dd>
	<p>
	After packing, if the newly created packs make some
	existing packs redundant, remove the redundant packs.
	Also run <em>git-prune-packed</em> to remove redundant
	loose object files.
	</p>
	</dd>
	<dt>
	-l
	</dt>
	<dd>
	<p>
	Pass the <tt>--local</tt> option to <em>git-pack-objects</em>. See
	<a href="git-pack-objects.html">git-pack-objects(1)</a>.
	</p>
	</dd>
	<dt>
	-f
	</dt>
	<dd>
	<p>
	Pass the <tt>--no-reuse-object</tt> option to <tt>git-pack-objects</tt>, see
	<a href="git-pack-objects.html">git-pack-objects(1)</a>.
	</p>
	</dd>
	<dt>
	-q
	</dt>
	<dd>
	<p>
	Pass the <tt>-q</tt> option to <em>git-pack-objects</em>. See
	<a href="git-pack-objects.html">git-pack-objects(1)</a>.
	</p>
	</dd>
	<dt>
	-n
	</dt>
	<dd>
	<p>
	Do not update the server information with
	<em>git-update-server-info</em>. This option skips
	updating local catalog files needed to publish
	this repository (or a direct copy of it)
	over HTTP or FTP. See <a href="git-update-server-info.html">git-update-server-info(1)</a>.
	</p>
	</dd>
	<dt>
	--window=[N]
	</dt>
	<dt>
	--depth=[N]
	</dt>
	<dd>
	<p>
	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 <tt>--window</tt> to see if using delta compression saves
	space. <tt>--depth</tt> 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.
	</p>
	</dd>
	<dt>
	--window-memory=[N]
	</dt>
	<dd>
	<p>
	This option provides an additional limit on top of <tt>--window</tt>;
	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".
	<tt>--window-memory=0</tt> makes memory usage unlimited, which is the
	default.
	</p>
	</dd>
	<dt>
	--max-pack-size=<n>
	</dt>
	<dd>
	<p>
	Maximum size of each output packfile, expressed in MiB.
	If specified, multiple packfiles may be created.
	The default is unlimited.
	</p>
	</dd>
	</dl></div>
	</div>
	<h2 id="_configuration">Configuration</h2>
	<div class="sectionbody">
	<div class="para"><p>When configuration variable <tt>repack.UseDeltaBaseOffset</tt> is set
	for the repository, the command passes <tt>--delta-base-offset</tt>
	option to <em>git-pack-objects</em>; this typically results in slightly
	smaller packs, but the generated packs are incompatible with
	versions of git older than (and including) v1.4.3; do not set
	the variable in a repository that older version of git needs to
	be able to read (this includes repositories from which packs can
	be copied out over http or rsync, and people who obtained packs
	that way can try to use older git with it).</p></div>
	</div>
	<h2 id="_author">Author</h2>
	<div class="sectionbody">
	<div class="para"><p>Written by Linus Torvalds <torvalds@osdl.org></p></div>
	</div>
	<h2 id="_documentation">Documentation</h2>
	<div class="sectionbody">
	<div class="para"><p>Documentation by Ryan Anderson <ryan@michonline.com></p></div>
	</div>
	<h2 id="_see_also">SEE ALSO</h2>
	<div class="sectionbody">
	<div class="para"><p><a href="git-pack-objects.html">git-pack-objects(1)</a>
	<a href="git-prune-packed.html">git-prune-packed(1)</a></p></div>
	</div>
	<h2 id="_git">GIT</h2>
	<div class="sectionbody">
	<div class="para"><p>Part of the <a href="git.html">git(1)</a> suite</p></div>
	</div>
	<div id="footer">
	<div id="footer-text">
	Last updated 2009-04-02 06:50:01 UTC
	</div>
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