ZFS being ported to the FreeBSD kernel

These last few days Pawel Dawidek has been working on porting ZFS to the FreeBSD kernel.

And he's made tremendous progress! He can already mount filesystems, list directories, create files/directories, change permissions.. The best of all, he did that in only 10 days!

Wow, now that's impressive.

zfs-fuse version 0.2.0 released

Hi,

If you were jealous of my previous post, now you can play with ZFS on Linux too ;)

Just head over to the download page and follow the README.

Note that it's still not possible to mount ZFS filesystems, so you won't be able to read or write files, however you can already manage ZFS pools and filesystems.

As always, you should report any bugs or problems to rcorreia at wizy dot org, or by using the bug database.

Have fun!

ZFS on Linux status

Hi everyone,

A lot of time has passed since my last post - sorry about that. I simply hadn't made any visible progress. My free time has been less than I expected and the needed time for this part of the project is a bit more than I originally thought it would be ;)

Anyway... on to the news.

zfs_ioctl.c and libzpool-kernel are finally compiling, linking and partially working.

It's not possible to mount ZFS filesystems yet, however a few commands already work:

$ uname -a
Linux wizy 2.6.15-26-amd64-generic #1 SMP PREEMPT Thu Aug 3 02:52:35 UTC 2006 x86_64 GNU/Linux

$ ~/zfs/trunk/zfs-fuse/zfs-fuse &

$ ./zpool status
no pools available

$ dd if=/dev/zero of=/tmp/test1 bs=1M count=100
$ dd if=/dev/zero of=/tmp/test2 bs=1M count=100
$ dd if=/dev/zero of=/tmp/test3 bs=1M count=100

$ ./zpool create pool raidz /tmp/test1 /tmp/test2 /tmp/test3
cannot mount '/pool': failed to create mountpoint

$ ./zpool list
NAME                    SIZE    USED   AVAIL    CAP  HEALTH     ALTROOT
pool                    286M     87K    286M     0%  ONLINE     -

$ ./zpool scrub pool

$ ./zpool status
  pool: pool
 state: ONLINE
 scrub: scrub completed with 0 errors on Sat Aug 19 03:45:45 2006
config:

        NAME            STATE     READ WRITE CKSUM
        pool            ONLINE       0     0     0
          raidz1        ONLINE       0     0     0
            /tmp/test1  ONLINE       0     0     0
            /tmp/test2  ONLINE       0     0     0
            /tmp/test3  ONLINE       0     0     0

errors: No known data errors

$ dd if=/dev/urandom of=/tmp/test2 bs=1M count=30

$ ./zpool scrub

$ ./zpool status
  pool: pool
 state: DEGRADED
status: One or more devices could not be used because the label is missing or
        invalid.  Sufficient replicas exist for the pool to continue
        functioning in a degraded state.
action: Replace the device using 'zpool replace'.
   see: http://www.sun.com/msg/ZFS-8000-4J
 scrub: scrub completed with 0 errors on Sat Aug 19 03:47:37 2006
config:

        NAME            STATE     READ WRITE CKSUM
        pool            DEGRADED     0     0     0
          raidz1        DEGRADED     0     0     0
            /tmp/test1  ONLINE       0     0     0
            /tmp/test2  UNAVAIL      0     0     0  corrupted data
            /tmp/test3  ONLINE       0     0     0

errors: No known data errors

$ ./zfs list
NAME                   USED  AVAIL  REFER  MOUNTPOINT
pool                  60.6K   158M  2.00K  /pool

$ ./zfs create pool/test
cannot mount '/pool/test': failed to create mountpoint
filesystem successfully created, but not mounted

$ ./zfs list
NAME                   USED  AVAIL  REFER  MOUNTPOINT
pool                  66.6K   158M  2.00K  /pool
pool/test             2.00K   158M  2.00K  /pool/test

There is still a major glitch in the zfs_ioctl <-> zpool/zfs communication, so I haven't uploaded the latest code to the SVN repository just yet, but I definitely expect to fix it tomorrow.

There's also an interesting bit of code that I implemented in order to help me debug zfs-on-fuse (also still not uploaded to SVN) that I'll talk about in my next post ;)

Stay tuned.