Sure, but the underlying primitives are better. Specifically it supports quite flexible binary replication including the new logical replication features.
With this you can build things like Manatee[1] which enable effectively seamless HA. The platform I am currently working on Flynn[2] uses a variant of this state machine to implement an effectively maintenance free Postgres cluster.
In future though there will be support for bi-directional replication in Postgres, i.e true multi-master support.
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PostgreSQL is nowhere near Clustering / HA / sharding features. Afaik it's only a master / slave architecture by default.
Sure, but the underlying primitives are better. Specifically it supports quite flexible binary replication including the new logical replication features. With this you can build things like Manatee[1] which enable effectively seamless HA. The platform I am currently working on Flynn[2] uses a variant of this state machine to implement an effectively maintenance free Postgres cluster.
In future though there will be support for bi-directional replication in Postgres, i.e true multi-master support.
[1] https://github.com/joyent/manatee [2] https://flynn.io/