olzvr.blogg.se - Veeam synthetic full backup best practice

An incremental backup file that should have been created by the backup job schedule will not be added to the backup chain. If a regular backup job is scheduled together with a synthetic full backup, Veeam Backup & Replication will produce only one backup file - a synthetic full backup that will contain the latest state of the source VM. For example, if you schedule the parent backup job at 12:00 AM Sunday through Friday, and schedule synthetic full backup on Saturday, Veeam Backup & Replication will start a backup job session that will produce a synthetic full backup at 12:00 AM on Saturday. The job session is started at the same time when the parent backup job is scheduled. Veeam Backup & Replication automatically triggers a backup job session to create a synthetic full backup, even if a regular backup job session is not scheduled on this day. On this day, Veeam Backup & Replication creates a new synthetic full backup.

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.

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.

When the synthetic full backup is created, Veeam Data Mover on the backup repository deletes the incremental backup file created at the beginning of the job session.

At the end of the backup job session, Veeam Data Mover on the backup repository builds a new synthetic full backup using backup files that are already available in the backup chain, including the newly created incremental backup file.

Incremental backup helps Veeam Backup & Replication ensure that the synthetic full backup includes the latest changes of the source VM in the production environment. Veeam Backup & Replication retrieves VM data for this incremental backup file from the production storage. During this session, Veeam Backup & Replication first performs incremental backup in a regular manner and adds a new incremental backup file to the backup chain.

On a day when synthetic full backup is scheduled, Veeam Backup & Replication triggers a new backup job session.

To create a synthetic full backup, Veeam Backup & Replication performs the following steps: