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 possible to allocate space frequently at the beginning, but after the allocation is complete, performance recovers. 3. The Client queries the ChunkServer for the leader ChunkServer node of the copyset CurveBS, so metadata scalability is very good in this way. 2. Fs-data cluster is used to store file data. Curve-fuse Supports Object storage by S3 apis and CurveBS CurveBS performance considerations

Curve High performance Cloud native Distributed storage system https://www.opencurve.io/Agenda • What is Curve • Use Cases • CurveBS • Key Features • Comparing to Ceph • CurveFS • Comparing Block Storage (CurveBS) • CurveBS: a high performance cloud native distributed block storage • Curve File System (CurveFS) • CurveFS: a high performance cloud native file systemUse Cases • Container on-prem OSSCurveBS • high performance • mainly used for (SSD, three replicas) • csi / storage class for kubernete, nbd for HOST/VMPerformance (vs. Ceph RBD)Performance (vs. Ceph RBD)CurveBS Features

CURVE: a High-performance Software-Defined storage for Cloud Native applications Xiang Dong Architect, Netease Hangzhou Research InstituteAgenda � Why develop storage Design objectives Achievements Easy operation and maintenance ○ High performance ● CEPH ○ Complex and Large amount of codes ○ system maintenance are difficult in corner cases ○ Performance requirements cannot be metAgenda Why develop Storage for KVM / Kubernetes / iSCSI Design objectives ● Thin provisioning storage pools ● High performance ● Easy maintenance ● Cloud NativeAgenda Why develop storage Design objectives � Achievements

storage system • High performance • Easiser operation • Cloud native • Curve is composed of two parts • Curve Block Storage (CurveBS) • CurveBS: a high performance cloud native distributed distributed block storage • Curve File System (CurveFS) • CurveFS: a high performance cloud native file system (Based on CurveBS / S3 compatible Storage)Operator capability Level OPERATOR CAPABILITY LEVEL CURVE Curve failure reports(disk / pods / mds/ chunkserver) to be viewed in dashboard • Gather Curve performance /delay reports to be viewed in dashboard

High performance Cloud native Distributed storage system https://www.opencurve.io/Agenda • CurveBS Architecture • CurveBS Topology • CurveBS Data Organization • MetaData Server (MDS) • ChunkServer ChunkServer • Client • CurveBS IO processing flow • CurveBS Performance considerations • Cloud NativeAgenda • CurveFS Architecture • CurveFS Data Organization • CurveFS file Organization • write • Reduce write magnification for file new write • Cooperate with Alibaba to support high-performance polardb for postgresql using CurveBS • Cloud-native support for CurveBS • CurveBS clusters

实现对PostgreSQL/PolarDB的监控管理  对PostgreSQL/PolarDB的TopSQL的管理  架构说明  有一台机器上部署的CLup管理节点，这个管 理节点提供WEB管理界面统一管理所有的 PostgreSQL/PolarDB数据库。  每台数据库主机上部署clup-agent。CLup管 理节点通过clup-agent来管理这台机器上的 PostgreSQL/PolarDB数据库。 │中启乘数科技（杭州）有限公司 数据赋能│价值创新 CLUP TOP SQL功能http://www.csudata.com │中启乘数科技（杭州）有限公司 数据赋能│价值创新 Clup管理界面-在Web界面中管理数据库-9- @ PolarDB环境准备创建PolarDB的要求  安装要求 需要有共享盘：盘的大小需要大于等于20GB CLup的高可用需要VIP 操作系统：CentOS7

02 03 04 Curve质量控制 Curve监控体系 Curve运维体系 19/33Curve监控架构 Docker-compose Prometheus Grafana Web UI Curve_ops_tool MDS MDS MDS MDS MDS ChunkServer MDS MDS Client Daily reporter MDS Curve使用brpc内置的bvar计数器类库，来生成监控指标，其特点是:  thread local存储，减少了cache bouncing，性能开销极小；  支持在 brpc server 服务的端口上以web portal的方式导出和查询监控指标： 常用的bvar数据类型:  bvar::Adder : 计数器，默认0， varname << N相当于varname += N  bvar::LatencyRecorder