For those who need OpenSource data deduplication today instead of tomorrow one might take a look at lessfs. http://www.lessfs.com I am thinking about starting to work on a data deduplicating blockdevice, a kernel module called blockless. For the time being lessfs is now stable and even usable as a blockdevice with the help of ietd, loop or nbd. Mark Ruijter _______________________________________________ linux-lvm mailing list linux-lvm@redhat.com https://www.redhat.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/