In the Readme i read the following sentence:

allowing basic active/backup high-availability with a "hot spare" synapse pointing at the same DB master, as well as enabling DB replication in synapse itself.

But i cannot find any documentation how this ha setup should work.
I also asked in the Matrix Channel Synapse Admins but no one could give me help there.

The only issue i found related is this one: #2123

So the questions that i would like to see answered in the docs are:

• What type of postres replication should i use?
  • I like the setup described here, but i have no experience with synapse und some guidance of typical setups would be nice: https://medium.com/searce/design-a-highly-available-postgresql-cluster-with-patroni-in-gcp-part-1-dfb6ed277806
• How can i achieve a hot spare setup as described in the documentation?
• When possible how could i achieve a "real" ha setup, using two or more matrix servers behind a loadbalancer?