Lessfs-1.1.0-beta4 is now available for download. This release improves write performance when writes are done with small block sizes. The graph below displays the write performance of XFS, the fastest filesystem that is available for Linux and all other de-duplicating filesystems that are available for Linux. Both Lessfs and ZFS-fuse are deduplicating and compressing the data. SDFS does deduplicate but does not compress the data.