This technical post explores the replica design for PUT operations in AdvisKV, a distributed KV storage system written in C++17. The author breaks down the architecture into Catalog, Topo, Storage, and SDK modules, explaining how they handle database/table creation, routing, KV reads/writes, and replica scaling. The discussion includes Raft consensus, WAL logging, and snapshot recovery mechanisms, providing a comprehensive view of building a robust storage layer. For engineers working on distributed systems, this offers practical patterns for replica management and fault tolerance. The post is part of a series, with this installment focusing on the storage internal replica design for write paths.
Deep dive into replica design for PUT operations in a C++17 distributed KV store, covering Raft, WAL, and snapshot recovery.