For this HowTo I used a VirtualBox with CentOS 5.7 x86_64. I attached a separate 20GB Data drive mounted to /data. This will hold the lessfs DB and data. The lessfs mountpoint I put at /lessfs. This is a very basic setup, just to get it running. There is plenty of tuning to be done based on volume size, file types, and compression choices. The latest lessfs required more recent versions of fuse and tokyocabinet than was in the CentOS repository, so I chose to install most of this from source.