nfs-nosync Running pts/fio-1.4.0 via the Phoronix Test Suite. nfs-nosync: Processor: Common KVM @ 2.30GHz (1 Core), Motherboard: QEMU Standard PC (i440FX + PIIX 1996), Chipset: Intel 440FX- 82441FX PMC, Memory: 1024MB, Disk: 21GB QEMU HDD, Network: Red Hat Virtio device OS: Ubuntu 18.04, Kernel: 4.15.0-48-generic (x86_64), File-System: ext4, System Layer: KVM nfs-nosync-fio: Processor: Common KVM @ 2.30GHz (1 Core), Motherboard: QEMU Standard PC (i440FX + PIIX 1996), Chipset: Intel 440FX- 82441FX PMC, Memory: 1024MB, Disk: 21GB QEMU HDD, Network: Red Hat Virtio device OS: Ubuntu 18.04, Kernel: 4.15.0-48-generic (x86_64), File-System: ext4, System Layer: KVM IOzone 3.465 Record Size: 1MB - File Size: 512MB - Disk Test: Read Performance MB/s > Higher Is Better nfs-nosync . 3958.86 |========================================================= IOzone 3.465 Record Size: 4Kb - File Size: 512MB - Disk Test: Read Performance MB/s > Higher Is Better nfs-nosync . 2275.17 |========================================================= IOzone 3.465 Record Size: 1MB - File Size: 512MB - Disk Test: Write Performance MB/s > Higher Is Better nfs-nosync . 797.90 |========================================================== IOzone 3.465 Record Size: 4Kb - File Size: 512MB - Disk Test: Write Performance MB/s > Higher Is Better nfs-nosync . 509.67 |========================================================== IOzone 3.465 Record Size: 64Kb - File Size: 512MB - Disk Test: Read Performance MB/s > Higher Is Better nfs-nosync . 4422.61 |========================================================= IOzone 3.465 Record Size: 64Kb - File Size: 512MB - Disk Test: Write Performance MB/s > Higher Is Better nfs-nosync . 734.52 |========================================================== Flexible IO Tester 2.1.11 Test: Example Network Job - Disk Target: Default Test Directory Seconds (Run Time) < Lower Is Better nfs-nosync-fio . 148.34 |====================================================== Flexible IO Tester 2.1.11 Test: Intel IOMeter File Server Access Pattern - Disk Target: Default Test Directory Seconds (Run Time) < Lower Is Better nfs-nosync-fio . 27.40 |=======================================================