values are passed to the filesystem with setattr() requests. * However, if the filesystem does not support the full resolution of * the kernel timestamps (nanoseconds), the mtime and ctime values used 2.2.52-3+b1 500 500 http://debian.hz.netease.com/debian-current stretch/main amd64 Packages root@pubbeta2-curve5:/home/nbs# apt-get install acl root@pubbeta2-curve5:/home/nbs# getfacl --help

LIFECYCLE Plan to Support app lifecycle, storage lifecycle(backup, failure, recovery) DEEP INSIGHTS Plan to Support metrics, alerts, log processing and workload analysis AUTO PILOT Plan to Support horizontal/vertical metadata backup and recovery • MDS / ChunkServer should respect failure domains of Kubernetes • Support for public cloud environments • Dashboard-driven configuration after minimal Curve installFeature alternative to host path • Support automatically detect new nodes, adding / removing nodes and disk drives • Support dynamic volume resizing • chunkserver on PVC support for different data and metadata(HDD

magnification for file new write • Cooperate with Alibaba to support high-performance polardb for postgresql using CurveBS • Cloud-native support for CurveBS • CurveBS clusters and related monitoring services FlowCurveFS Roadmap • CurveFS based on CurveBS • Cache support on CurveFS • NFS support on CurveFS • Cloud tiering support • Cloud-native support for CurveFS • CurveFS clusters and related monitoring

container 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 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 • v1.2 supporting on CurveBS • POSIX-compatible and mountable • Cache support on CurveFS • CurveFS cloud native support • csi plugin for CurveFS • support operator capability level 2: automated application provisioning

Restore data on a disk within 5 minutes Data availability of 6 nines can be achievedCloud native Support Currently we offer CSI Driver for block storage to provide PV/PVC resources on KubernetesAgenda api Manage multiple types of storage (object storage, HDFS storage, Elastic block storage) Support both on-premise and public cloudsAgenda Why develop storage Design objectives Achievements in Roadmap ● Features ○ 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

of snapshots l Support asynchronous and incremental snapshot l Support lazy (pre-allocated space) and non-lazy (allocated space on needs) clones from snapshots/mirrors l Support rollback from snapshot scattered all over the storage nodes. ChunkServer provides 4KB random read/write capability to support 4KB aligned read/write on block devices.CurveBS file structure of virtual block device As mentioned

for more details. If this request is answered with an error code of ENOSYS and FUSE_CAP_NO_OPEN_SUPPORT is set in fuse_conn_info.capable, this is treated as success and future calls to open and release uint64_t lock_owner; /** Requested poll events. Available in ->poll. Only set on kernels which support it. If unsupported, this field is set to zero. */ uint32_t poll_events; }; // fastcfs typedef

gcc 编译 bazel build –config=gcc7-later … # use '-faligned-new' to enable C++17 over-aligned new support # 使用 clang 编译 CC=clang CXX=clang++ bazel build …2 制作镜像 docker run -v $(pwd):/curve -v /root/

驱动没有本地cache，所以DPO & FUA可以turn on. • sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA • 这个对于curve驱动，Linux Initiator的dmesg不会显示这个信息TGT的性能问题 • 性能问题主要体现在不能有效使用多CPU • 对多个socket