IO processing flow, we first describe the overall architecture, data organization and topology structure of CURVE. CurveBS uses the central node Metadata Server (MDS) to manage virtual disk random read/write capability to support 4KB aligned read/write on block devices.CurveBS file structure of virtual block device As mentioned above, CurveBS maps virtual block devices to files. Let's The gap is even greater under high stress. 2. User space Zero copy of user data Iobuf structure is used to store user data, and user space data is transferred through reference of data address

keep_cache) which the filesystem may set in fi, to change the way the file is opened. See fuse_file_info structure in for more details. If this request is answered with an error code of ENOSYS and