Postgres can also work as a multi instance database like Oracle RAC

Hi Folks,

I would like to know can Postgres supports migration of Oracle RAC mutli instance database to Postgres.
Is there any multi instance database feature supported by Postgres similar to Oracle RAC database, it is
different from Single instance database.

Thanks
-Ravi

No. PostgreSQL does't have multiple Instance Single Database Concept.

However, you can try following solutions:
1. Streaming Replication and Load Balancing of SELECT using pgpool.
2. Slony Replication + Load Balancing of SELECT using pgpool.
3. Multi-Master Replication using Bucardo and Load Balancing of DML.
4. From PG 9.1, PostgreSQL would be having Synchronous Replication. So, you can use Replication + Load Balancing.