long NETWORK LATENCY 50MS 1s frequently 7s recentlyStorage Engine Comparison (vs. Ceph) META MANAGEMENT CURVE CHUNK SERVER BLUESTORE META Precreate Chunk File Pool on ext4 RocksDB META OVERHEAD CurveFS • support operator capability level 2: automated application provisioning and configuration management and patch and minor version upgrads supported • File meta data preallocate • RAFT optimization

Supports RDMA and SPDK ○ Further reduce I/O latency and improve throughput ○ Support data lifecycle management ○ Curve block devices can be used as the underlying storage of Curve file systems ● System operation provide high availability/reliability ● Zero copy; Data stripe; RDMA to improve performance ● Management and monitor tools ● Support CSI deriver for upper cloud native applications accessTHANKS

operator to install, upgrade, backup, and expand CurveBS clusters • Use Curve Discover to discover resource changes and to collect the system’s runtime status to operatorCurveFS ArchitectureCurveFS Data OrganizationCurveFS operator to install, upgrade, backup, and expand CurveFS clusters • Use Curve Discover to discover resource changes and to collect the system’s runtime status to operatorthanksAbout RAFT

CURVE COMMENT BASIC INSTALL Y (by Helm) automated application provisioning and configuration management SEAMLESS UPGRADES Y (by Helm) patch and minor version upgrads supported FULL LIFECYCLE Plan

●特点是比较原始，开销小，但是没有很强的功能 ●是网络接口层，主要功能是网卡发现和远程内存传输支持，提供component查询和 memory domain的打开 ●一个component包含若干 memory domain resource,一个memory domain又可以包含若干个 transport ●当前支持的memory domain：ibverbs, tcp, shared memory ●详情可以见examples/uct_hello_world