Retention Policy for Backups

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    For image-level backups of Azure VMs and backups of Azure SQL databases, Veeam Backup for Microsoft Azure retains restore points for the number of days defined in backup scheduling settings.

    To track and remove outdated restore points from a backup chain, Veeam Backup for Microsoft Azure performs the following actions once a day.

    1. Veeam Backup for Microsoft Azure checks the configuration database to detect blob containers that contain outdated restore points.
    2. If an outdated restore point exists in a blob container, Veeam Backup for Microsoft Azure transforms the backup chain in the following way:
    1. Veeam Backup for Microsoft Azure rebuilds the full backup file to include there data of the incremental backup file that follows the full backup file. To do that, Veeam Backup for Microsoft Azure injects into the full backup file data blocks from the earliest incremental backup file in the chain. This way, the full backup ‘moves’ forward in the backup chain.

     

    Retention Policy for Backups 

    1. Veeam Backup for Microsoft Azure removes the earliest incremental backup file from the chain as redundant — this data has already been injected into the full backup file.

     

    Retention Policy for Backups 

    1. Veeam Backup for Microsoft Azure repeats step 2 for all other outdated restore points found in the backup chain until all the restore points are removed. As data from multiple restore points is injected into the rebuilt full backup file, Veeam Backup for Microsoft Azure ensures that the backup chain is not broken and that you will be able to recover your data when needed.

     

    Retention Policy for Backups