iozone-no-discard KVM QEMU 1.5.3 testing on CentOS Linux 7 via the Phoronix Test Suite. iozone-no-discard: Processor: 2 x QEMU Virtual 1.5.3 @ 2.27GHz (2 Cores), Motherboard: Red Hat KVM (0.5.1 BIOS), Chipset: Intel 440FX- 82441FX PMC, Memory: 1 x 514 MB RAM, Disk: 17GB, Graphics: Cirrus Logic GD 5446, Network: Red Hat Virtio device OS: CentOS Linux 7, Kernel: 3.10.0-693.17.1.el7.bug14347.centos.plus.x86_64 (x86_64), Compiler: GCC 4.8.5 20150623, File-System: ext4, System Layer: KVM QEMU 1.5.3 IOzone 3.465 Record Size: 1MB - File Size: 2GB - Disk Test: Read Performance MB/s > Higher Is Better iozone-no-discard . 122.98 |=================================================== IOzone 3.465 Record Size: 1MB - File Size: 4GB - Disk Test: Read Performance MB/s > Higher Is Better iozone-no-discard . 100.28 |=================================================== IOzone 3.465 Record Size: 1MB - File Size: 8GB - Disk Test: Read Performance MB/s > Higher Is Better iozone-no-discard . 101.19 |=================================================== IOzone 3.465 Record Size: 4Kb - File Size: 2GB - Disk Test: Read Performance MB/s > Higher Is Better iozone-no-discard . 109.91 |=================================================== IOzone 3.465 Record Size: 4Kb - File Size: 4GB - Disk Test: Read Performance MB/s > Higher Is Better iozone-no-discard . 99.25 |==================================================== IOzone 3.465 Record Size: 4Kb - File Size: 8GB - Disk Test: Read Performance MB/s > Higher Is Better iozone-no-discard . 100.65 |=================================================== IOzone 3.465 Record Size: 1MB - File Size: 2GB - Disk Test: Write Performance MB/s > Higher Is Better iozone-no-discard . 95.75 |==================================================== IOzone 3.465 Record Size: 1MB - File Size: 4GB - Disk Test: Write Performance MB/s > Higher Is Better iozone-no-discard . 95.48 |==================================================== IOzone 3.465 Record Size: 1MB - File Size: 8GB - Disk Test: Write Performance MB/s > Higher Is Better iozone-no-discard . 95.41 |==================================================== IOzone 3.465 Record Size: 4Kb - File Size: 2GB - Disk Test: Write Performance MB/s > Higher Is Better iozone-no-discard . 96.34 |==================================================== IOzone 3.465 Record Size: 4Kb - File Size: 4GB - Disk Test: Write Performance MB/s > Higher Is Better iozone-no-discard . 89.44 |==================================================== IOzone 3.465 Record Size: 4Kb - File Size: 8GB - Disk Test: Write Performance MB/s > Higher Is Better iozone-no-discard . 85.23 |==================================================== IOzone 3.465 Record Size: 64Kb - File Size: 2GB - Disk Test: Read Performance MB/s > Higher Is Better iozone-no-discard . 121.09 |=================================================== IOzone 3.465 Record Size: 64Kb - File Size: 4GB - Disk Test: Read Performance MB/s > Higher Is Better iozone-no-discard . 104.43 |=================================================== IOzone 3.465 Record Size: 64Kb - File Size: 8GB - Disk Test: Read Performance MB/s > Higher Is Better iozone-no-discard . 105.24 |=================================================== IOzone 3.465 Record Size: 1MB - File Size: 512MB - Disk Test: Read Performance MB/s > Higher Is Better iozone-no-discard . 119.95 |=================================================== IOzone 3.465 Record Size: 4Kb - File Size: 512MB - Disk Test: Read Performance MB/s > Higher Is Better iozone-no-discard . 117.65 |=================================================== IOzone 3.465 Record Size: 64Kb - File Size: 2GB - Disk Test: Write Performance MB/s > Higher Is Better iozone-no-discard . 98.83 |==================================================== IOzone 3.465 Record Size: 64Kb - File Size: 4GB - Disk Test: Write Performance MB/s > Higher Is Better iozone-no-discard . 96.93 |==================================================== IOzone 3.465 Record Size: 64Kb - File Size: 8GB - Disk Test: Write Performance MB/s > Higher Is Better iozone-no-discard . 99.99 |==================================================== IOzone 3.465 Record Size: 1MB - File Size: 512MB - Disk Test: Write Performance MB/s > Higher Is Better iozone-no-discard . 101.68 |=================================================== IOzone 3.465 Record Size: 4Kb - File Size: 512MB - Disk Test: Write Performance MB/s > Higher Is Better iozone-no-discard . 101.80 |=================================================== IOzone 3.465 Record Size: 64Kb - File Size: 512MB - Disk Test: Read Performance MB/s > Higher Is Better iozone-no-discard . 126.49 |=================================================== IOzone 3.465 Record Size: 64Kb - File Size: 512MB - Disk Test: Write Performance MB/s > Higher Is Better iozone-no-discard . 98.80 |====================================================