HotAdd Backup Process for Amazon EC2 Instances Including Amazon VPC Resources

When Amazon VPC protection is enabled, the HotAdd backup operation includes the following stages:

1. For each instance, create an AMI.

   This operation creates crash-consistent snapshots of instance volumes.

2. Write the instance configuration file, the network configuration JSON file, and the instance metadata to the backup index.

3. Create volumes from the snapshots.

4. Attach volumes to the VSA proxy.

   For Windows instances, up to 21 volumes can be attached to the VSA proxy during backups, occupying device slots xvd[f-z], xvda[b-z]. This limit includes any volumes that are already attached to the proxy. If EBS is attached to slot xvdf, only 20 volumes can be attached.

   For Linux instances, up to 40 volumes can be attached to the VSA proxy during backups, occupying device slots /dev/sd[f-z], /dev/xvda[a-z].

5. Back up the volumes, using CRC for incremental changes and directing data through the MediaAgent for the storage policy that is associated with the backup.

6. Unmount, detach, and delete the snapshots, and de-register the AMI.

   The snapshots created for instances that were deleted or removed from the subclient must be cleaned up manually.

7. Delete the AMI.

8. If CBT is enabled, retain the most recent AMI (tagged with CV_CBT_Snap).