On 6/12/2020 12:39 PM, David Brodbeck wrote:
None of this, of course, is an issue when backing up always-on servers with static IPs -- which is Bacula's focus.
Not really: what's happening is if an intermediate node goes down, IP will find a different route -- *at the network layer*.
We normally run backups over non-routed links. "Always-on servers with static IPs" would normally be on the same (V)LAN. A VPN is a direct point-to-point link at Data Link Layer, even if it's tunneled over TCP/IP.
When a switch or NAT router or a virtual interface goes down at link layer, there's nothing IP can do about it.
The problem is time: as data size goes up, it takes longer to complete the backup, and with that the chances of a link-level disruption go up too.
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