Did your last project use data replication? If yes, how was it implemented?

In my last project, data replication was used to ensure high availability and fault tolerance of the database. Replication was implemented at the DBMS level — a master-slave scheme was used, where all records went to the master, and slaves synchronized asynchronously. This allowed offloading read operations by directing queries to the slaves while maintaining data integrity.

For example, in PostgreSQL, streaming replication was configured, where slave servers received WAL logs from the master and applied them for synchronization. This scheme is well-suited for applications with a high volume of read operations and fewer write operations.