proxmox_iscsi KVM testing on Ubuntu 18.04 via the Phoronix Test Suite. iscsi over freenas: Processor: Common KVM @ 2.66GHz (8 Cores), Motherboard: QEMU Standard PC (i440FX + PIIX 1996), Chipset: Intel 440FX- 82441FX PMC, Memory: 1 x 4916 MB RAM QEMU, Disk: 17GB QEMU HDD, Graphics: Device 1234:1111, Network: Red Hat Virtio device OS: Ubuntu 18.04, Kernel: 4.15.0-88-generic (x86_64), File-System: ext4, Screen Resolution: 800x600, System Layer: KVM IOzone 3.465 Record Size: 1MB - File Size: 512MB - Disk Test: Read Performance MB/s > Higher Is Better iscsi over freenas . 1615.84 |================================================= IOzone 3.465 Record Size: 4Kb - File Size: 512MB - Disk Test: Read Performance MB/s > Higher Is Better iscsi over freenas . 909.19 |================================================== IOzone 3.465 Record Size: 1MB - File Size: 512MB - Disk Test: Write Performance MB/s > Higher Is Better iscsi over freenas . 72.21 |=================================================== IOzone 3.465 Record Size: 4Kb - File Size: 512MB - Disk Test: Write Performance MB/s > Higher Is Better iscsi over freenas . 73.05 |=================================================== IOzone 3.465 Record Size: 64Kb - File Size: 512MB - Disk Test: Read Performance MB/s > Higher Is Better iscsi over freenas . 2030.41 |================================================= IOzone 3.465 Record Size: 64Kb - File Size: 512MB - Disk Test: Write Performance MB/s > Higher Is Better iscsi over freenas . 72.53 |===================================================