How Synthetic Full Backup Works
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To create a synthetic full backup, Veeam Agent for Microsoft Windows performs the following steps:
- On a day when synthetic full backup is scheduled, Veeam Agent for Microsoft Windows triggers a new backup job session. During this session, Veeam Agent for Microsoft Windows first performs incremental backup in a regular manner and adds a new incremental backup file to the backup chain. Incremental backup helps Veeam Agent for Microsoft Windows ensure that the synthetic full backup includes the latest changes of the backed-up data.
- At the end of the backup job session, Veeam Agent for Microsoft Windows builds a new synthetic full backup using backup files that are already available in the backup chain, including the newly created incremental backup file.
- When the synthetic full backup is created, Veeam Agent for Microsoft Windows deletes the incremental backup file created at the beginning of the job session. As a result, you have a backup chain that consists of a full backup file, set of incremental backup files and synthetic full backup file.
- Every next job session creates a new incremental restore point starting from the synthetic full backup until the day on which synthetic full backup is scheduled. On this day, Veeam Agent for Microsoft Windows creates a new synthetic full backup.