System (CurveFS) • CurveFS: a high performance cloud native file systemUse Cases • Container • Database • Data apps(middleware/bigdata/ai) • Data backupContainer • Aggregates underlying storage container-native storageDatabase • Database services orchestrated in the cloud • Curve can backup / sync data to slave cloud • When master cloud failure happens, Database service can move to the slave horizontal / vertical scaling, auto config tuning, abnormal detection and schedule tuningStorage Engine Comparison (vs. Ceph) DATA CONSISTENT PROTOCOL CURVE (RAFT) CEPH WRITE SUCCESS majority write successful

CURVE Roadmap CURVE Community You can take awayDesign objectives App scenario & requires ● Database scenario ● Elastic block Storage for KVM / Kubernetes / iSCSI Design objectives ● Thin provisioning take awayPerformance in database scenario Solution architecture ● CURVE provides underlying distributed shared storage services ● Polardb for PostgreSQL provides database services Solution features seperation between storage and computation ● The call method is the same as that of the standalone database Performance test vs CEPH ● BenchmarkSQL transactions per minute increased by 39% ● In PGBench

–消息通过回调函数接收 –消息异步发送 ●Tag –MPI使用 ●Stream –官方不推荐30 WORKER ●worker是UCX通讯中的核心概念，它是一个进度引擎(progress engine) ●worker既不是协程也不是线程，而是一个状态机，可以通过不停地调用 ucp_worker_progress(worker)完成功能。如果你用过libuv或者libevent的evbuffer，它们有点