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...
介绍完理论过程,让我们看一组存储性能对比 Virtio vs Vhost-user(单节点性能)。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 i...
针对传统内核NVMe驱动,qemu进程中io线程负责处理虚拟机下发的IO请求:它通过virtio backend从IO环中取出请求,并将请求通过系统调用传递给内核块层和NVMe驱动层进行处理,最后由NVMe驱动将请求通过Queue Pair(类似IO环)交由物理NVMe控制器进行处理;NVMe控制器处理完成后以物理中断方式通知qemu io线程,由它将响应放...
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...
nvmem of opp parisc parport pci pcmcia peci perf phy pinctrl platform pmdomain pnp power powercap pps ps3 ptp pwm rapidio ras regulator remoteproc reset rpmsg rtc s390 sbus scsi sh siox slimbus soc soundwire spi spmi ssb staging target tc tee thermal thunderbolt tty ufs uio usb vdpa vfio...
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...
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 下的 Latency(数值越低越好)性能差异: 总结 通过理论和真实的性能数据介绍,可以看出,相比 Virtio 方案,通过 Vhost 技术实现了更加突出的存储性能表现,但...
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...
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...