1 ใน feature เทพของ zfs คือการ snapshot และ rollback snapshot กลับมาครับ
ZFS Snapshots
A ZFS snapshot is a read-only copy of ZFS file system or volume. It can be used to save the state of a ZFS file system at a point of time, and one can roll back to this state at a later date. One can even extract files from a snapshot and not need to perform a complete roll back.
In the following example, we snapshot the mypool/projects file system:
$ sudo zfs snapshot -r mypool/projects@snap1
..and we can see the collection of snapshots using:
$ sudo zfs list -t snapshot
NAME USED AVAIL REFER MOUNTPOINT
mypool/projects@snap1 8.80G - 8.80G -
Now lets 'accidentally' destroy all the files and then roll back:
$ rm -rf /mypool/projects
$ sudo zfs rollback mypool/projects@snap1
One can remove a snapshot using the following:
$ sudo zfs destroy mypool/projects@snap1
อ่านเพิ่มเติมได้ที่นี่ =>
https://wiki.ubuntu.com/Kernel/Reference/ZFS?_ga=1.176405667.767193649.1490418040
