Definition (Replication)
Replication is the process of creating and maintaining multiple copies of data or services across different nodes in a distributed system. The main goal of replication is to improve Definition (High Availability)high availability, fault tolerance, and performance by allowing multiple nodes to serve requests for the same data or service.
A node is called a replica if it holds a copy of the data or service. Replication can be done at different levels, such as file-level, block-level, or application-level. The replication process involves synchronizing the replicas to ensure memory consistency and handling failures to maintain availability.
Replication levels can vary. In general,