The Black Footed Ferret File System
BFFFS is a new copy-on-write file system written entirely in Rust. It aims tohave all of the usual COW goodies (transactional integrity, snapshots, clones, etc), but with better RAID, faster performance in some ways, and native support for SMR hard drives and OpenChannel SSDs.
BFFFS is currently implemented as a FUSE server, and currently runs on FreeBSD. The easiest way to start using it with a single disk pool is to do:
pkg install -y c-blosc isa-l fusefs-libs pkgconf
cargo build
truncate -s 1g /tmp/bfffs.img
target/debug/bfffs pool create foo /tmp/bfffs.img
sudo target/debug/bfffsd -o allow_other,default_permissions foo /mnt /tmp/bfffs.img
Where OPTIONS can be:
allow_other,default_permissions- Allow users other than the one running bfffsd to access the mounted file system.cache_size- Set the maximum mount of cached clean data in bytes. Higher values will generally give better performance. Beware, though, that unlike an in-kernel file system bfffsd will never shrink the cache in response to memory pressure. The kernel will simply kill bfffsd or some other process instead.writeback_size- Set the soft limit for the amount of cached dirty data in bytes. This is completely independent ofcache_size. Generally it should be at least several seconds' worth of your disks' maximum throughput. The actual amount of dirty data may exceed this limit, but not by more than a few MB.
BFFFS is primarily distributed under the terms of both the MIT license and the Apache License (Version 2.0).
See LICENSE-APACHE, and LICENSE-MIT for details