Lacque (in short prefix, sometimes lac is used) is an open source implementation of Google's 'Chubby' lock service. Some functions are still in development. browse source kuenishi's blog (Japanese) howto % hg clone http://hg.assembla.com/ceJktkTxCr3AUmab7jnrAJ lacque and see lacque/README.txt A space that is preconfigured with a Mercurial tool and repository.