About AWS Tags

A tag is a label that you assign to an AWS resource. Each tag consists of a key and an optional value that you define.

Tags enable you to categorize your AWS resources based on purpose, owner, environment, and so on. When you have multiple resources of the same type, the tags help you to quickly identify a specific resource. For example, you could define a set of tags for your account's Amazon EC2 instances that helps you track the owner of each instance and stack level.

How are tagged resources recognized for during backup job run?

When you are using tags to add resources to policy, the policy does not show up under the server immediately.

When you use tags to add resources to a policy, the policy does not show up under the server immediately.  A manual sync must be performed for the policy to appear under the server. However, the backup for the newly tagged instances does not depend on the sync functionality for the account. 

When the policy runs as per the schedule, CloudRanger uses AWS elastic search to recognize and back up the instances associated with the tag in real time. Even those instances which are not synced are backed up without any issue depending on the tags associated with them.