dellr720-sas3 KVM testing on Ubuntu 20.04 via the Phoronix Test Suite. SSD Raid10 NFS defaults: Processor: Intel Xeon E5-2650 v2 (16 Cores), Motherboard: QEMU Standard PC (i440FX + PIIX 1996) (rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org BIOS), Chipset: Intel 440FX 82441FX PMC, Memory: 16GB, Disk: 34GB QEMU HDD, Graphics: bochs-drmdrmfb, Monitor: QEMU Monitor, Network: Red Hat Virtio device OS: Ubuntu 20.04, Kernel: 5.4.0-91-generic (x86_64), Vulkan: 1.0.2, Compiler: GCC 9.3.0, File-System: ext4, Screen Resolution: 1024x768, System Layer: KVM SSD Raid10 NFS sync disabled atime off: Processor: Intel Xeon E5-2650 v2 (16 Cores), Motherboard: QEMU Standard PC (i440FX + PIIX 1996) (rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org BIOS), Chipset: Intel 440FX 82441FX PMC, Memory: 16GB, Disk: 34GB QEMU HDD, Graphics: bochs-drmdrmfb, Monitor: QEMU Monitor, Network: Red Hat Virtio device OS: Ubuntu 20.04, Kernel: 5.4.0-91-generic (x86_64), Vulkan: 1.0.2, Compiler: GCC 9.3.0, File-System: ext4, Screen Resolution: 1024x768, System Layer: KVM SSD Raid10 NFS defaults with zil: Processor: Intel Xeon E5-2650 v2 (16 Cores), Motherboard: QEMU Standard PC (i440FX + PIIX 1996) (rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org BIOS), Chipset: Intel 440FX 82441FX PMC, Memory: 16GB, Disk: 34GB QEMU HDD, Graphics: bochs-drmdrmfb, Monitor: QEMU Monitor, Network: Red Hat Virtio device OS: Ubuntu 20.04, Kernel: 5.4.0-91-generic (x86_64), Vulkan: 1.0.2, Compiler: GCC 9.3.0, File-System: ext4, Screen Resolution: 1024x768, System Layer: KVM IOzone 3.465 Record Size: 64Kb - File Size: 2GB - Disk Test: Read Performance MB/s > Higher Is Better SSD Raid10 NFS defaults . 3404.07 |============================================ IOzone 3.465 Record Size: 1MB - File Size: 2GB - Disk Test: Read Performance MB/s > Higher Is Better SSD Raid10 NFS defaults . 2741.23 |============================================ IOzone 3.465 Record Size: 4Kb - File Size: 2GB - Disk Test: Write Performance MB/s > Higher Is Better SSD Raid10 NFS defaults . 55.44 |============================================== IOzone 3.465 Record Size: 1MB - File Size: 2GB - Disk Test: Write Performance MB/s > Higher Is Better SSD Raid10 NFS defaults . 60.79 |============================================== IOzone 3.465 Record Size: 64Kb - File Size: 2GB - Disk Test: Write Performance MB/s > Higher Is Better SSD Raid10 NFS defaults . 66.71 |============================================== IOzone 3.465 Record Size: 4Kb - File Size: 2GB - Disk Test: Read Performance MB/s > Higher Is Better SSD Raid10 NFS defaults . 1713.89 |============================================ IOzone 3.465 Record Size: 64Kb - File Size: 512MB - Disk Test: Read Performance MB/s > Higher Is Better SSD Raid10 NFS defaults ................ 2734.51 |========================== SSD Raid10 NFS sync disabled atime off . 3041.38 |============================= SSD Raid10 NFS defaults with zil ....... 2939.27 |============================ IOzone 3.465 Record Size: 1MB - File Size: 512MB - Disk Test: Write Performance MB/s > Higher Is Better SSD Raid10 NFS defaults ................ 69.69 |======================= SSD Raid10 NFS sync disabled atime off . 93.41 |=============================== SSD Raid10 NFS defaults with zil ....... 76.77 |========================= IOzone 3.465 Record Size: 1MB - File Size: 512MB - Disk Test: Read Performance MB/s > Higher Is Better SSD Raid10 NFS defaults ................ 2707.55 |======================= SSD Raid10 NFS sync disabled atime off . 3036.85 |========================== SSD Raid10 NFS defaults with zil ....... 3401.09 |============================= IOzone 3.465 Record Size: 64Kb - File Size: 512MB - Disk Test: Write Performance MB/s > Higher Is Better SSD Raid10 NFS defaults ................ 68.27 |======================= SSD Raid10 NFS sync disabled atime off . 92.47 |=============================== SSD Raid10 NFS defaults with zil ....... 81.08 |=========================== IOzone 3.465 Record Size: 4Kb - File Size: 512MB - Disk Test: Read Performance MB/s > Higher Is Better SSD Raid10 NFS defaults ................ 1223.08 |============================ SSD Raid10 NFS sync disabled atime off . 1279.60 |============================= SSD Raid10 NFS defaults with zil ....... 1260.37 |============================= IOzone 3.465 Record Size: 4Kb - File Size: 512MB - Disk Test: Write Performance MB/s > Higher Is Better SSD Raid10 NFS defaults ................ 45.26 |================ SSD Raid10 NFS sync disabled atime off . 89.97 |=============================== SSD Raid10 NFS defaults with zil ....... 78.32 |===========================