NVMe-oF Target是NVMe协议在不同传输网络(transport)上面的延伸。NVMe-oF协议中的transport可以多种多样,如以太网、光纤通道、Infiniband等。当前比较流行的transport实现是基于RDMA的Ethernet transport、Linux Kernel和SPDK的NVMe-oF Target等,另外对于光纤通道的transport,NetApp基于SPDKNVMe-oF Target的代码,实现了基于光纤...
SPDK vhost-user结合NVMe-oF远端Target和Initiator的拓扑图如下所示 NVMe-oF Target Machine是标准的bare metal的服务器,上面运行SPDK nvmf_tgt应用程序,并且配置对应的local bdev。Host Machine也是标准的bare metal服务器,其上运行Vhost-target应用程序,通过QEMU启动虚拟机VM1,VM2,VMn等。通过在虚拟机VM1,VM2,VMn...
vhost_target performance of 4k random read is much lower than expected. Expected Behavior I created nvmf_tgt on the storage node and added a nvme SSD. The storage client reads and writes the SSD through the RDMA network. The IOPS of random read tested by fio_plugin on the storage client...
测试数据基于 3 节点集群（超融合架构，集群存储网络未开启 RDMA），节点硬件配置如下：· Intel Xeon Gold 5122 3.6GHz· 8*16G DDR4 2666MHz· 2*Intel P4610 1.6T NVMe· Mellanox CX-4 25Gbps 通过图表对比单节点 4k iodepth=128 下的 IOPS（数值越高越好）性能差异：通过图表对比单节点 4k iodepth=1...
QEMU 通过 iSCSI Drive 发起存储连接(iscsi over tcp to localhost); 通过Socket 将请求连接到存储进程提供的 iSCSI Target; 存储引擎接收请求并进行 I/O 处理; 存储引擎发起对本地存储介质的 I/O; I/O 操作结束,通过上述逆过程返回至 Virtio 后端 Device,QEMU 会向模拟的 PCI 发送中断通知,从而 Guest 基于该...
iSCSI Target对外提供iSCSI服务,用户可以将运行SPDK服务的主机当前标准的iSCSI存储设备来使用;vhost-scsi或vhost-blk对qemu提供后端存储服务,qemu可以基于SPDK提供的后端存储为虚拟机挂载virtio-scsi或virtio-blk磁盘;NVMF对外提供基于NVMe协议的存储服务端。注意,图中vhost-blk在spdk-18.04版本中已实现,后面我们主要基于此...
iSCSI Target对外提供iSCSI服务,用户可以将运行SPDK服务的主机当前标准的iSCSI存储设备来使用;vhost-scsi或vhost-blk对qemu提供后端存储服务,qemu可以基于SPDK提供的后端存储为虚拟机挂载virtio-scsi或virtio-blk磁盘;NVMF对外提供基于NVMe协议的存储服务端。注意,图中vhost-blk在spdk-18.04版本中已实现,后面我们主要基于此...
Application userspace kernel VFS 9p virtio-9p.koGuestVM virtio-9p-pci/vhost-9p-pci QEMU 9pVFS NVMeSSD 9pbackend Containerdeploymentsutilizeexplicitorimplicitfilesharingbetweenhostfilesystemandcontainers.2 What’sFUSE •FUSE(FilesysteminUserspace)isaninterfaceforuserspaceprogramstoexportafilesystemtothe...
Start SPDK Vhost target Create malloc or NVMe bdev Create Vhost BLK controller and attach previously created bdev Start a Qemu VM with a device that connects to controller's socket. Context (Environment including OS version, SPDK version, etc.) SPDK 35828d5 System under test: Fedora 35 5.16....
Application userspace kernel VFS 9p virtio-9p.koGuestVM virtio-9p-pci/vhost-9p-pci QEMU 9pVFS NVMeSSD 9pbackend Containerdeploymentsutilizeexplicitorimplicitfilesharingbetweenhostfilesystemandcontainers.2 What’sFUSE •FUSE(FilesysteminUserspace)isaninterfaceforuserspaceprogramstoexportafilesystemtothe...