tio Intel Xeon testing on CentOS 6.4 (Final) via the Phoronix Test Suite. PersistentDisk: Processor: Intel Xeon @ 2.60GHz (4 Cores), Motherboard: Google, Memory: 15360MB, Disk: 11GB PersistentDisk + 107GB PersistentDisk, Network: Red Hat Virtio device OS: CentOS 6.4 (Final), Kernel: 3.3.8-gcg-201303011431 (x86_64), Compiler: GCC 4.4.7 20120313, File-System: ext4 Threaded I/O Tester 0.3.3 Test: Read - Size Per Thread: 64MB - Thread Count: 4 MB/s > Higher Is Better PersistentDisk . 3164.66 |===================================================== Threaded I/O Tester 0.3.3 Test: Write - Size Per Thread: 64MB - Thread Count: 4 MB/s > Higher Is Better PersistentDisk . 83.50 |======================================================= Threaded I/O Tester 0.3.3 Test: Random Read - Size Per Thread: 64MB - Thread Count: 4 MB/s > Higher Is Better PersistentDisk . 2244.44 |===================================================== Threaded I/O Tester 0.3.3 Test: Random Write - Size Per Thread: 64MB - Thread Count: 4 MB/s > Higher Is Better PersistentDisk . 11.44 |=======================================================