I have to perform WAL Streaming replication configuration for
An existing small production server with 600 GB of size grown over for two years. There is no WAL replication in place configured as of now.
2. If I want to perform WAL replication to a new Standby Server
How to copy the 600 GB of DB data to Standby? OR when we configure the WAL replication attributes on primary and standby will the Standby automatically copy all the 600 GB data to the defined WAL archive dir ?
Or Do I need to manually copy the data directory of primary by SCP over NW or by copying the data directory of Primary to a USB disk and manually copy to the WAL archive_dir folder defined in the standby ? What method to follow ? why?
It is up to you. You can initialise your standby instance by either using pg_basebackup or copying the cluster manually.
3. In WAL streaming replication what ports/protocols are used for copying the data directory of primary to archive_dir of standby server and for Streaming ?
It uses PostgreSQL's replication protocol and PostgreSQL's port.