![]() ![]() Let’s consider the following AG deployment as a reference.īased on the above sample AG deployment, following are various considerations: #Backup scheduler down avamar full#If the backup preference is secondary only, then you need to register at least one secondary node to the vault (otherwise, log/copy-only full backups can't happen).Ĭonfiguring backups for AG databases will fail with the error code FabricSvcBackupPreferenceCheckFailedUserError if the above conditions aren't met.You must register the primary node to the vault (otherwise, full backups can't happen).Register AG nodes to the Recovery Services vaultĪ Recovery Services vault supports backup of databases only from VMs in the same region and subscription as that of the vault. The selected node proceeds with the backup job, whereas the job triggered on the other nodes bails out, that is, it skips the job.Īzure Backup doesn’t consider backup priorities or replicas while deciding among the secondary replicas. The node selection depends on the backup type and the backup preference as explained in section 1. The schedules fire on all the AG nodes and the workload backup extensions on these nodes synchronize between themselves to decide which node will perform the backup. When an AG database is configured for backup, the backup schedules are pushed to all the registered nodes of the AG. The workload backup extension gets installed on the node when it is registered with the Azure Backup service. Secondary replicas are preferred, but backups can run on primary replica also. For copy-only full and transaction log backups, the AG backup preference is considered while deciding the node where backup will run. So, these backup jobs always run on the Primary node irrespective of the backup preference. ![]() The backup preference used by Azure Backup SQL AG supports full and differential backups only from the primary replica.
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