How Veeam Backup for Microsoft Azure Estimates SLA Compliance

To estimate SLA compliance for an SLA-based backup policy, Veeam Backup for Microsoft Azure performs the following steps:

1. Calculates the SLA compliance ratio individually for each Azure VM added to the backup scope. The SLA compliance ratio equals a percentage of restore points successfully created for the VM out of the total number of restore points expected to be produced by the SLA-based backup policy for this VM.

When calculating the SLA compliance ratio for daily, weekly and monthly restore points, Veeam Backup for Microsoft Azure takes into account snapshot and backup settings configured while creating the SLA template that is assigned to the SLA-based backup policy.

2. Uses the ratios calculated at step 1 to determine the average SLA compliance ratio for the policy.
3. Compares the target SLA value configured for the policy to the average SLA compliance ratio calculated at step 2. If the target SLA value equals or is less than the average SLA compliance ratio, Veeam Backup for Microsoft Azure marks this policy as meeting SLA standards. 

   Impact of SLA Template Changes on SLA Compliance Estimation

   Veeam Backup for Microsoft Azure estimates SLA compliance for each SLA-based backup policy based on the schedule settings configured for the SLA template that is assigned to this policy. When you modify snapshot or backup settings for an SLA template or assign another template to an SLA-based backup policy, this affects the SLA compliance ratio retrospectively — meaning that Veeam Backup for Microsoft Azure recalculates the SLA compliance ratio for all entries on the SLA Compliance Overview chart.

   For example, if an SLA-based backup policy configured to produce daily snapshots every 2 hours between 10:00 AM and 2:00 PM successfully creates 2 snapshots on time, this means that the SLA compliance ratio will be 100%. If you reconfigure the policy to produce daily snapshots every 1 hour between 10:00 AM and 2:00 PM, and if the policy successfully creates 4 snapshots on time, this means that the SLA compliance ratio will change to 50% on the SLA Compliance Overview chart.

   Important

   Modifying snapshot or backup settings for an SLA template or assigning another template to an SLA-based backup policy may cause Veeam Backup for Microsoft Azure to incorrectly calculate the SLA compliance ratio for the policy on the day when this modification is made. To learn how to edit SLA template settings, see Managing SLA Templates.