high performance cloud native file system (Based on CurveBS / S3 compatible Storage)Operator capability Level OPERATOR CAPABILITY LEVEL CURVE COMMENT BASIC INSTALL Y (by Helm) automated application provisioning SEAMLESS UPGRADES Y (by Helm) patch and minor version upgrads supported FULL LIFECYCLE Plan to Support app lifecycle, storage lifecycle(backup, failure, recovery) DEEP INSIGHTS Plan to Support metrics, alerts

○ 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 ●

from CS1 to CS2的operator给这三个copyset ④ MDS通过RPC在CS2上创建copyset1,2,3这三个copyset ⑤ 假定三个copyset的leader都是CS3，在CS3的下一次心跳的 response中，下发第三步生成的三个operator ⑥ CS3收到change peer from CS1 to CS2的operator，给CS2同步 raft to CS1的operator给 部分copyset，比如copyset1,2,3 ⑤ MDS通过RPC在CS1上创建copyset1,2,3这些copyset ⑥ 假定三个copyset的leader都是CS3，在CS3的下一次心跳的 response中，下发第四步生成的三个operator ⑦ CS3收到change peer from CS2 to CS1的operator，给CS1同步

service (in Plan) • Config CurveBS by (Cluster and Pool CRDs) in Kubernetes (in Plan) • Support Operator capability level 5 (in Plan) • horizontal / vertical scaling, auto config tuning, abnormal detection Plan) • Config CurveFS by (cluster and storage pools) CRDs in Kubernetes (in Plan) • Support Operator capability level 5 (in Plan) • now support helmCurrent Status • Release 2 major version on CurveBS Cache support on CurveFS • CurveFS cloud native support • csi plugin for CurveFS • support operator capability level 2: automated application provisioning and configuration management and patch and

services can be configured using CRDs in public cloud and on- premises environments • Use the Curve operator to install, upgrade, backup, and expand CurveBS clusters • Use Curve Discover to discover resource services can be configured using CRDs in public cloud and on- premises environments • Use the Curve operator to install, upgrade, backup, and expand CurveFS clusters • Use Curve Discover to discover resource

改造 vs 自己实现? redis 中哈希表实现的优点？ 参考 前言 根据之前讨论的结果，元数据节点的架构如下图所示，这里涉及到两部分需要持久化/编码的内容： Raft Log：记录 operator log Raft Snapshot：将内存中的数据结构以特定格式 dump 到文件进行持久化© XXX Page 3 of 12 Raft Log +------+-----------

I 2021-08-25T17:18:13.642961+0800 1930722 disk_cache_manager.cpp:55] whs start write. I 2021-08-25T17:18:17.992374+0800 1930722 disk_cache_manager.cpp:61] whs end write.

metastore：负责元数据的内存部分的管理，负责选partition partition：负责元数据的一段分片，每个元数据一定有对应的partition进行处理 inode manange/ dentry manager：负责管理元数据的内存结构 heartbeat：定期获取copyset的信息 模块 估算工作量（开发 + ci完成） client 10d mds 15d metaserver 10d