sync-zfs-snapshots

Synchronises all snapshots from one zfs filesystem to another.

This is useful if you want to have a set of backup USBs and you want them to have all your zfs snapshots or if you have a remote server that a sync may fail.

Simply run sync-zfs-snapshots and it will work out all the missing snapshots and send them in suitable order. It's designed to be very easy to use.

Syntax

sync-zfs-snapshots [--sshIdentity /root/.ssh/id_rsa_backup] <source filesystem> <target filesystem>

Source or destination filesystem can be either:

• local mounted zfs filesystem: <zpool>/<filesystem>
• zfs filesystem on a remote server via ssh: ssh://<username>@<server>[:port]:<zpool>/<filesystem>

Example

sync-zfs-snapshots --sshIdentity /root/.ssh/id_rsa_backup ssh://[email protected]:2022:backups/current backups_usb001/current

Setup

Let's say you have a filesystem mypool/files and you want to replicate to another disk on the same server. First set up the new pool and the target filesystem.

zpool create -o ashift=12 otherpool /dev/xvda12
zfs create otherpool/files2

Now we replicate any snapshots from mypool/files into the target. It doesn't matter if there are 2 or 200 snapshots to replicate.

sync-zfs-snapshots mypool/files otherpool/files2