Engine release notes for Multi-master Cluster (Limitless) Edition

To address the write performance bottleneck in a single-writer, multi-reader architecture, PolarDB for MySQL has introduced Multi-master Cluster (Limitless) Edition. This cluster upgrades the architecture from single-writer, multi-reader to multi-writer, multi-reader by utilizing multiple primary nodes. This solution is designed for high-concurrency read/write scenarios such as software as a service (SaaS) multi-tenant systems, gaming systems, and e-commerce platforms.