CURVE: a High-performance Software-Defined storage for Cloud Native applications Xiang Dong Architect, Netease Hangzhou Research InstituteAgenda � Why develop storage Design objectives Achievements Zero data copy pre-created file poolCURVE file system File service middleware Upper-layer applications can access file data in storage pools through interfaces such as NFS/HDFS/Posix api Manage away Challenges faced ● With the development of hardware and software, more and more stateful applications require to run on the clouds ● High availability/reliability ● Easy to operation and maintenance

Multi-replicas consistency 3. The client l Provides read and write data interfaces for upper-layer applications l Interacts with MDS to add, delete, modify, and query metadata l Interacts with the chunkServer