Veeam Backup & Replication 10
User Guide for Microsoft Hyper-V
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Assignment of GFS Flags

When configuring GFS retention policy settings, you can choose a number of GFS flag types that Veeam Backup & Replication will use to mark backup files for long-term retention. Depending on this number, Veeam Backup & Replication will apply slightly different algorithms when assigning GFS flags:

Veeam Backup & Replication assigns GFS flags only after you save GFS retention policy settings. This means that GFS flags are assigned only to those backup files created after the configuration, while backup files created earlier are not affected and previously assigned flags are not modified.

Algorithm for One Flag Type

If you select only one type of GFS flags when configuring retention policy settings for a backup job, Veeam Backup & Replication performs the following steps as soon as the job finishes:

Click to zoom in

Consider the following example. On Monday, you configure GFS policy settings of a backup job in a way weekly GFS flags must be assigned every Wednesday. The following animation shows how Veeam Backup & Replication will assign the flag if a full backup file is not created on the scheduled day.

Assignment of GFS Flags

Assignment of GFS Flags Example Description

  1. Until Wednesday, Veeam Backup & Replication will not assign any GFS flags because the scheduled period has not started yet.
  2. On Wednesday, the backup job will produce an incremental backup file. Veeam Backup & Replication will start waiting for a full backup file to be created since the scheduled period is now started.

Assignment of GFS Flags  

  1. On Thursday, the backup job will produce another incremental backup file, while Veeam Backup & Replication will still be waiting for a full backup file.

Assignment of GFS Flags  

  1. On Friday, the backup job will produce a full backup file, and Veeam Backup & Replication will immediately assign the weekly GFS flag to the backup file.

Assignment of GFS Flags  

Algorithm for Multiple Flag Types

If you select multiple types of GFS flags when configuring retention policy settings for a backup job, GFS flags depend on each other. Yearly flags (high level) depend on monthly flags, monthly flags depend on weekly flags, weekly flags (low level) do not depend on any flags. This means that Veeam Backup & Replication can only assign GFS flags of a higher level to backup files with GFS flags of a lower level — this mechanism helps you save space on the backup repository.

Assignment of GFS Flags Important!

The described mechanism does not apply to a situation where you select only two types of GFS flags, yearly and weekly. If you select these two types and do not select the monthly type, Veeam Backup & Replication treats the case as if you select only one flag type. This means that flags of each type are assigned according to the algorithm for one flag type.

Veeam Backup & Replication performs the following steps as soon as the job finishes. Note that GFS flags of lower levels are processed before flags of higher levels.

Click to zoom in

Consider the following example. On Monday, you configure GFS policy settings of a backup job in a way weekly GFS flags must be assigned every Wednesday and monthly GFS flags must be assigned every first week of a month. The following animation shows how Veeam Backup & Replication will assign the flags.

Assignment of GFS Flags

Assignment of GFS Flags Example Description

  1. On Monday, the backup job will produce an incremental backup file. Veeam Backup & Replication will start waiting for a full backup file since the monthly scheduled period is now started.
  2. On Tuesday, the backup job will produce a full backup file. Although Veeam Backup & Replication will still be waiting for a full backup file, the full backup file with weekly GFS flag is required.

Assignment of GFS Flags  

  1. On Wednesday, the backup job will produce an incremental backup file.
  2. On Thursday, the backup job will produce an incremental backup file. Veeam Backup & Replication will start waiting for a full backup file to assign the weekly GFS flag to it since the weekly scheduled period is now started.

Assignment of GFS Flags  

  1. On Friday, the backup job will produce a full backup file. Veeam Backup & Replication will immediately assign the weekly GFS flag to the backup file. As the weekly GFS flag will have been assigned, Veeam Backup & Replication will also assign the monthly GFS flag to the backup file.

Assignment of GFS Flags  

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