Please can somebody explain how the following works:


Two nodes in always on availability group configuration (all databases).

If I have a backup job on node 1 to backup Full and Log backups to a network share, then failover to node 2 and continue the log backups, will this not break the log chain? So each time a failover occurs does a full backup job need to be executed?

Thank you


As I understand, you are performing a full backup and log backups on server 1, then you perform a fail over to server 2.

When you start performing the log backups on server 2 it follows the log chain.

So to answer your question: No it is not needed to perform a full backup job every time your availability group fails over.

I suggest that you test this in a pre-production environment. Do full backup on server 1, perform log backups on server 1, fail over, do log backup on server 2. Restore on another server the full backup and the log backups from server 1 followed with the log backups from server 2.

Good luck.


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