CDNWiki - View Source: CyberLeo/FreeBSDZFSLayout

Note: You are viewing an old version of this page. View the current version.
Basics:
* pool/root-version is for a given OS version
* pool/root-all is for data independent of OS version
* pool/tld is for new top-level directories - use your judgment

Each upgrade uses the following sequence:
* Snapshot all filesystems
<pre>
zfs snapshot -r mtumishi/root-8.2p2@2011-10-29_20:00:00
</pre>
* Clone the snapshots to the new version
<pre>
zfs clone mtumishi/root-8.2p2@2011-10-29_20:00:00 mtumishi/root-8.2p4
zfs clone mtumishi/root-8.2p2/tmp@2011-10-29_20:00:00 mtumishi/root-8.2p4/tmp
...
</pre>
* Perform upgrade
<pre>
mergemaster -pd /zfs/mtumishi/root-8.2p4
make installworld DESTDIR=/zfs/mtumishi/root-8.2p4
make installkernel DESTDIR=/zfs/mtumishi/root-8.2p4
mergemaster -d /zfs/mtumishi/root-8.2p4
</pre>
* Point to the new install
<pre>
echo 'vfs.root.mountfrom="zfs:mtumishi/root8.2p4"' >> /zfs/mtumishi/root-8.2p4/boot/loader.conf
sed -i~ 's/^mtumishi\/root-8.2p2/mtumishi\/root-8.2p4/g' /zfs/mtumishi/root-8.2p4/etc/fstab
zpool set bootfs=mtumishi/root-8.2p4 mtumishi
</pre>
* Hide mountpoints
<pre>
zfs set mountpoint=legacy mtumishi/root-8.2p4
</pre>
* Reboot to test!

Notes:
* It may be useful to place /usr and /usr/local on separate datasets, so you can snapshot before a port upgrade without having to snapshot all of /usr and / as well

<code brush="plain">
NAME                                    USED  AVAIL  REFER  MOUNTPOINT
mtumishi                               2.73G   214G    24K  /zfs/mtumishi
mtumishi/home                          21.1M   214G  21.1M  /home
mtumishi/obj                            875M   214G   875M  /usr/obj
mtumishi/ports                          170M   214G   170M  /usr/ports
mtumishi/root-8.2p2                     426M   214G   423M  legacy
mtumishi/root-8.2p2/tmp                94.5K   214G  66.5K  legacy
mtumishi/root-8.2p2/var                1.86M   214G  1.67M  legacy
mtumishi/root-8.2p2/var/crash          22.5K   214G  22.5K  legacy
mtumishi/root-8.2p2/var/empty            21K   214G    21K  legacy
mtumishi/root-8.2p2/var/tmp              44K   214G    23K  legacy
mtumishi/root-8.2p4                     256M   214G   423M  legacy
mtumishi/root-8.2p4/tmp                  34K   214G  66.5K  legacy
mtumishi/root-8.2p4/var                  57K   214G    21K  legacy
mtumishi/root-8.2p4/var/crash            16K   214G  22.5K  legacy
mtumishi/root-8.2p4/var/tmp              20K   214G    23K  legacy
mtumishi/root-all                      45.6M   214G    22K  legacy
mtumishi/root-all/var                  45.6M   214G  1.69M  /var
mtumishi/root-all/var/empty              15K   214G    21K  /var/empty
mtumishi/root-all/var/log               194K   214G   194K  /var/log
mtumishi/root-all/var/ports            45.2M   214G    24K  /var/ports
mtumishi/root-all/var/ports/distfiles  45.1M   214G  45.1M  /var/ports/distfiles
mtumishi/root-all/var/ports/packages     21K   214G    21K  /var/ports/packages
mtumishi/src                            293M   214G   293M  /usr/src
mtumishi/srv                            354M   214G    25K  /srv
mtumishi/srv/iscsi                       21K   214G    21K  /srv/iscsi
mtumishi/srv/jail                        21K   214G    21K  /srv/jail
mtumishi/srv/srcs                       353M   214G    23K  /srv/srcs
mtumishi/srv/srcs/freebsd               353M   214G    23K  /srv/srcs/freebsd
mtumishi/srv/srcs/freebsd/9             353M   214G   353M  /srv/srcs/freebsd/9
</code>