ceph-iozone QEMU 2.0.0 testing on Ubuntu 14.04 via the Phoronix Test Suite. no cache: Processor: 4 x QEMU Virtual 2.0.0 @ 2.60GHz (4 Cores), Motherboard: QEMU Standard PC (i440FX + PIIX 1996), Chipset: Intel 440FX- 82441FX PMC, Memory: 1 x 4096 MB RAM, Disk: 11GB, Graphics: Cirrus Logic GD 5446, Network: Red Hat Virtio device OS: Ubuntu 14.04, Kernel: 3.13.0-39-generic (x86_64), Compiler: GCC 4.8, File-System: ext4, Screen Resolution: 1024x768, System Layer: QEMU 2.0.0 IOzone 3.405 Record Size: 1MB - File Size: 4GB - Disk Test: Read Performance MB/s > Higher Is Better no cache . 94.96 |============================================================= IOzone 3.405 Record Size: 4Kb - File Size: 4GB - Disk Test: Read Performance MB/s > Higher Is Better no cache . 94.26 |============================================================= IOzone 3.405 Record Size: 1MB - File Size: 4GB - Disk Test: Write Performance MB/s > Higher Is Better no cache . 247.02 |============================================================ IOzone 3.405 Record Size: 4Kb - File Size: 4GB - Disk Test: Write Performance MB/s > Higher Is Better no cache . 245.38 |============================================================ IOzone 3.405 Record Size: 64Kb - File Size: 4GB - Disk Test: Read Performance MB/s > Higher Is Better no cache . 94.94 |============================================================= IOzone 3.405 Record Size: 64Kb - File Size: 4GB - Disk Test: Write Performance MB/s > Higher Is Better no cache . 248.61 |============================================================