Memcached itself does not natively support data replication as part of its core functionality. However, there are several approaches and strategies that can be used to implement data replication with Memcached in distributed environments:

Client-Side Replication : Implement client-side replication where client applications store copies of data across multiple Memcached servers. This can be achieved by distributing data access requests across multiple servers and maintaining consistent copies of data in each server. Client applications handle data replication and synchronization logic.

Middleware Solutions : Use middleware solutions or caching frameworks built on top of Memcached that provide built-in support for data replication. These solutions typically implement replication mechanisms such as master-slave or master-master replication for distributing data across multiple cache nodes and ensuring data consistency.

Custom Replication Logic : Implement custom replication logic within client applications or middleware layers to replicate data between Memcached servers. This may involve periodically synchronizing data between servers, handling data consistency and conflict resolution, and ensuring fault tolerance and high availability.
External Tools and Libraries : Utilize external tools, libraries, or plugins that integrate with Memcached and provide data replication capabilities. Some third-party tools offer features such as data synchronization, consistency guarantees, and automatic failover to replicate data across Memcached servers in distributed environments.

Memcached Clusters : Deploy Memcached clusters using clustering solutions or distributed caching platforms that support data replication out of the box. These platforms typically manage data replication, distribution, and consistency across multiple cache nodes transparently, providing a scalable and fault-tolerant caching solution.

Memcached Replication Modules : Some third-party Memcached distributions or modules offer experimental support for data replication. These modules extend Memcached's functionality to include features such as replication protocols, data synchronization mechanisms, and fault tolerance mechanisms for replicating data across cache nodes.