I think a simple DB sync feature could be:
If Svr 1 (PMS) shutsdown the now closed DB will be automated uploaded to Google drive for example.
If Svr 2 (PMS) will be started then the uploaded DB will be downloaded automated and overwrites the old DB on Svr 2 and therefore you have all the watch Status etc in sync.
This means that you have identical PMS installs on both Svr. In my Case then two SSDs.
(+ you have the DB for backup purposes on Google drive in case HDD or SSD dies)
