Git sym是一款通过git符号链接的进行大文件处理的软件，其目的是从修订控制中分离出庞大的文件缓存。
特性：
Clones of the source repository are small and fast because no binaries are transferred, yet fully functional with complete metadata and incremental retrieval (git clone –depth has limited granularity and couples metadata to content).
git-bisect works properly even when versions of the binary files change over time. (We recommend installing a git-sym-post-checkout-hook, in case the resources have not been cached already.)
selective control of which large files to pull into the local store
Local fat object stores can be shared between multiple clones, even by different users.
can easily support fat object stores distributed across multiple hosts, and potentially anywhere in the world
depends only on stock Python and simple UNIX commands
安装：
您可以在您的$ PATH中通过调用git-sym运行这个git命令。
ln -sf `pwd`/git-sym ~/bin/git-sym
或者,您也可以直接运行:
python git-sym -h
基本用法：
repo用户
git-sym show git-sym update
repo所有者
git-sym link --add my_big_file.gif git commit -m 'git-sym added' ls -l my_big_file.gif
或者更明确，利用规则检索
ln -sf .git_sym/my_big_data.v123.db my_big_data.db git add my_big_data.db git commit cat <<EOF >> git_sym.makefile my_big_data.v123.db: wget http://www.somewhere.com/my_big_data.v123.db EOF git-sym update
