DDM supports both compute layer (DDM) scaling (increasing the number of nodes or increasing node...

DDM supports both compute layer (DDM) scaling (increasing the number of nodes or increasing node specifications) and storage layer (MYS). QL) is expanding online, and storage layer expansion is divided into translation expansion (the total number of shards remains unchanged) and doubling expansion (doubling the number of shards). Computing layer expansion affects services in seconds, and storage layer expansion is completely transparent to services. Single selection