qcow2 VMware testing on Ubuntu 14.04 via the Phoronix Test Suite. 2015-06-12 19:20: Processor: 2 x Westmere E56xx/L56xx/X56xx (Nehalem-C) @ 2.80GHz (2 Cores), Motherboard: QEMU Standard PC (i440FX + PIIX 1996), Chipset: Intel 440FX- 82441FX PMC, Memory: 2048MB, Disk: 13GB, Graphics: VMware SVGA II, Audio: Intel 82801FB/FBM/FR/FW/FRW, Network: Red Hat Virtio device OS: Ubuntu 14.04, Kernel: 3.16.0-38-generic (x86_64), Compiler: GCC 4.8, File-System: ext4, System Layer: VMware 2015-06-13 15:41: Processor: 2 x Westmere E56xx/L56xx/X56xx (Nehalem-C) @ 2.80GHz (2 Cores), Motherboard: QEMU Standard PC (i440FX + PIIX 1996), Chipset: Intel 440FX- 82441FX PMC, Memory: 2048MB, Disk: 13GB, Graphics: VMware SVGA II, Audio: Intel 82801FB/FBM/FR/FW/FRW, Network: Red Hat Virtio device OS: Ubuntu 14.04, Kernel: 3.16.0-38-generic (x86_64), Compiler: GCC 4.8, File-System: ext4, System Layer: VMware QCOW2: Processor: 2 x Westmere E56xx/L56xx/X56xx (Nehalem-C) @ 2.80GHz (2 Cores), Motherboard: QEMU Standard PC (i440FX + PIIX 1996), Chipset: Intel 440FX- 82441FX PMC, Memory: 2048MB, Disk: 13GB, Graphics: VMware SVGA II, Audio: Intel 82801FB/FBM/FR/FW/FRW, Network: Red Hat Virtio device OS: Ubuntu 14.04, Kernel: 3.16.0-38-generic (x86_64), Compiler: GCC 4.8, File-System: ext4, System Layer: VMware LVM: Processor: 2 x Westmere E56xx/L56xx/X56xx (Nehalem-C) @ 2.80GHz (2 Cores), Motherboard: QEMU Standard PC (i440FX + PIIX 1996), Chipset: Intel 440FX- 82441FX PMC, Memory: 2048MB, Disk: 8GB, Graphics: VMware SVGA II, Audio: Intel 82801FB/FBM/FR/FW/FRW, Network: Red Hat Virtio device OS: Ubuntu 14.04, Kernel: 3.16.0-38-generic (x86_64), Compiler: GCC 4.8, File-System: ext4, System Layer: VMware Apache Benchmark 2.4.7 Static Web Page Serving Requests Per Second > Higher Is Better 2015-06-12 19:20 . 8270.31 |=================================================== LVM .............. 8199.35 |=================================================== Unpacking The Linux Kernel linux-2.6.32.tar.bz2 Seconds < Lower Is Better 2015-06-13 15:41 . 15.21 |===================================================== QCOW2 ............ 14.46 |================================================== LVM .............. 14.97 |==================================================== Stream 2013-01-17 Type: Copy MB/s > Higher Is Better QCOW2 . 12793.79 |========================================================== LVM ... 13529.02 |============================================================= OpenSSL 1.0.1g RSA 4096-bit Performance Signs Per Second > Higher Is Better QCOW2 . 124.13 |=============================================================== LVM ... 123.80 |===============================================================