If google would use dgraph, should it use for everything one single dgraph DB, or for every service (Maps, YouTube, GMail...) an own dgraph DB?

[amaster507 (Anthony Master)]

For best performance of HA, every node is its own machine. So Z1 A1 A4 A7 are four separate machines and Z2 A2 A5 A8 are four other separate machines. Groups are logical containers of machines.