创建zpool池
root@pve:~# zpool create test /dev/sda6
这时/dev/sda6最好不要用这种sdx的方式，容易发生变化造成找不到硬盘，建议
ls -al /dev/disk/by-id看一下对应的id，然后通过zpool create test /dev/disk/by-id/xxxxxxx的方式创建
查看
root@pve:~# zfs list
NAME USED AVAIL REFER MOUNTPOINT
test 336K 95.9G 96K /test
查看zpool
root@pve:~# zpool status test
pool: test
state: ONLINE
scan: none requested
config:
NAME STATE READ WRITE CKSUM
test ONLINE 0 0 0
sda6 ONLINE 0 0 0
errors: No known data errors
创建zfs
root@pve:~# zfs create test/home
查看
root@pve:~# zfs list
NAME USED AVAIL REFER MOUNTPOINT
test 432K 95.9G 96K /test
test/home 96K 95.9G 96K /test/home
创建一个snap1.txt文件用于测试
root@pve:~# touch /test/home/snap1.txt
root@pve:~# ls /test/home/
snap1.txt
创建一个快照名叫snap1
root@pve:~# zfs snapshot test@snap1 -r
查看
root@pve:~# zfs list
NAME USED AVAIL REFER MOUNTPOINT
test 440K 95.9G 96K /test
test@snap1 0B - 96K -
test/home 104K 95.9G 104K /test/home
test/home@snap1 0B - 104K -
创建一个新文件snap2.txt用于测试
root@pve:~# touch /test/home/snap2.txt
再创建一个快照取名snap2
root@pve:~# zfs snapshot test/home@snap2
查看
root@pve:~# zfs list
NAME USED AVAIL REFER MOUNTPOINT
test 644K 95.9G 96K /test
test@snap1 56K - 96K -
test/home 168K 95.9G 104K /test/home
test/home@snap1 64K - 104K -
test/home@snap2 0B - 104K -
把快照进行远程备份，这里/mnt/pve/omv-cifs是挂载的omv上的samba共享文件夹，快照保存为test.snap1
root@pve:~# zfs send -Rv test@snap1 > /mnt/pve/omv-cifs/test.snap1
skipping snapshot test/home@snap2 because it was created after the destination snapshot (snap1)
full send of test@snap1 estimated size is 40.6K
full send of test/home@snap1 estimated size is 44.6K
total estimated size is 85.2K
TIME SENT SNAPSHOT
TIME SENT SNAPSHOT
同样把snap2也备份一下
root@pve:~# zfs send -Rv test/home@snap2 > /mnt/pve/omv-cifs/test.home.snap2
full send of test/home@snap1 estimated size is 44.6K
send from @snap1 to test/home@snap2 estimated size is 30.6K
total estimated size is 75.2K
TIME SENT SNAPSHOT
TIME SENT SNAPSHOT
下面回滚恢复一下snap1快照
root@pve:~# zfs rollback test/home@snap1 -r
下面我们会看到目录下恢复为第一个文件了，也就是第二个文件被回滚了
root@pve:~# ls /test/home/
snap1.txt
再查看一下zfs，发现snap2的快照也没了
root@pve:~# zfs list
NAME USED AVAIL REFER MOUNTPOINT
test 648K 95.9G 96K /test
test@snap1 56K - 96K -
test/home 160K 95.9G 104K /test/home
test/home@snap1 56K - 104K -
那我们刚才把snap2远程备份了，那试试恢复回来：
root@pve:~# cat /mnt/pve/omv-cifs/test.home.snap2 | zfs recv -Fd test
看一下zfs发现确实恢复了
root@pve:~# zfs list
NAME USED AVAIL REFER MOUNTPOINT
test 700K 95.9G 96K /test
test@snap1 64K - 96K -
test/home 168K 95.9G 104K /test/home
test/home@snap1 64K - 104K -
test/home@snap2 0B - 104K -
查看一下文件，snap2.txt也回来了
root@pve:~# ls /test/home/
snap1.txt snap2.txt
zfs增量备份
root@pve:/# zfs list -r test
NAME USED AVAIL REFER MOUNTPOINT
test 1.10M 95.9G 96K /test
test@snap1 56K - 96K -
test@snap2 0B - 96K -
test/home 168K 95.9G 104K /test/home
test/home@snap1 64K - 104K -
test/home@snap2 0B - 104K -
将test/home@snap2增量发送备份
root@pve:/# zfs send -vPR -I test@snap1 test@snap2 > /mnt/pve/omv-cifs/test.snap2
回滚到snap1
root@pve:/# zfs rollback -rf test@snap1
root@pve:/# zfs rollback -rf test/home@snap1
root@pve:/# zfs list -r test
NAME USED AVAIL REFER MOUNTPOINT
test 1004K 95.9G 96K /test
test@snap1 0B - 96K -
test/home 104K 95.9G 104K /test/home
test/home@snap1 0B - 104K -
从增量备份的snap2恢复
root@pve:/# cat /mnt/pve/omv-cifs/test.snap2 | zfs recv -Fd test
root@pve:/# zfs list -r test
NAME USED AVAIL REFER MOUNTPOINT
test 1.13M 95.9G 96K /test
test@snap1 56K - 96K -
test@snap2 0B - 96K -
test/home 168K 95.9G 104K /test/home
test/home@snap1 64K - 104K -
test/home@snap2 0B - 104K -
