Migrate ZFS pool to a different server

I hope you run your server with ZFS already :-)

For some reason you may need to migrate your ZFS pool with all snapshots to a different server. This could be a backup reason or simple a migration scenario.

In the example the pool named zones. So first you create a recursive snapshot of your pool:

zfs snapshot -r zones@migrate_20160204

You could simple verify that the snapshots exists via:

zfs list -t snapshot

I use SSH to migrate the data between two servers. It depends on your network, so you could also switch to netcat or something similar.

zfs send -R zones@migrate_20160204 | ssh user@host "zfs receive -Fd zones"

You may like to add options like -v to show some more detailed output of the transferred data.

It could be your data is modified during the migration. For that reason you could easily create a new snapshot after the send and receive command finished.

zfs create -r snapshot zones@migrate_20160205

Incremental zfs send is possible with the -i option. So zfs send only the difference between two snapshots to the remote server.

zfs send -R -i zones@migrate_20160204 zones@migrate_20160204 | \
    ssh user@host "zfs receive -F zones"

Posted

February 05, 2016, 9:28 am

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