On Mon, 2015-07-13 at 17:58 -0700, Kent Overstreet wrote:

Short announcement, because I'm in the process of moving - but I wanted to get
this out there because the code is up and I think it's reasonably stable right
now.

Bcachefs is a posix filesystem that I've been working towards for - well, quite
awhile now: it's intended as a competitor/replacement for ext4/xfs/btrfs.

Current features
 - multiple devices
 - replication
 - tiering
 - data checksumming and compression (zlib only; also the code doesn't work with
   tiering yet)
 - most of the normal posix fs features (no fallocate or quotas yet)

Planned features:
 - snapshots!
 - erasure coding
 - more

There will be a longer announcement on LKML/linux-fs in the near future (after
I'm finished moving) - but I'd like to get it a bit more testing from a wider
audience first, if possible.

You need the bcache-dev branch, and the new bcache tools - be warned, this code
is _not_ compatible with the upstream bcache on disk format:

$ git clone -b bcache-dev http://evilpiepirate.org/git/linux-bcache.git
$ git clone -b dev http://evilpiepirate.org/git/bcache-tools.git

Then do the usual compiling...

# bcacheadm format -C /dev/sda1
# mount /dev/sda1 /mnt

How to mount it?

root@afa03:~# bcacheadm format -C /dev/sdt
UUID:			87b0f1e2-e0dc-4453-b0c0-6afca64d402c
Set UUID:		b5f3bc6a-2aab-4fe1-a8db-e35cc763388c
version:		6
nbuckets:		143051
block_size:		1
bucket_size:		4096
nr_in_set:		1
nr_this_dev:		0
first_bucket:		3

root@afa03:~# mount /dev/sdt /mnt/
mount: mount(2) failed: No such file or directory

root@afa03:~# mount -t bcache /dev/sdt /mnt/
mount: mount(2) failed: No such file or directory