TurnKey Linux Virtual Appliance Library

Is the Hub TKLBAM's central point of failure?

No, for a couple of reasons:

  1. After the initial setup, TKLBAM communicates directly with Amazon S3. Even if the Hub does down, backups will not be interrupted.
  2. You can use TKLBAM without linking it to the Hub at all. See the tklbam-init --solo option.