a bit of everything test on combell openstack instance combell osp instance: Processor: 2 x Intel Xeon E312xx (Sandy Bridge) @ 2.60GHz (2 Cores), Motherboard: OpenStack Foundation Nova v13.0.0, Chipset: Intel 440FX- 82441FX PMC, Memory: 1 x 4096 MB RAM QEMU, Disk: 30GB, Graphics: Red Hat QXL paravirtual graphic card, Network: Red Hat Virtio device OS: Ubuntu 16.04, Kernel: 4.4.0-24-generic (x86_64), File-System: ext4, System Layer: KVM AIO-Stress 0.21 Test: Random Write MB/s > Higher Is Better combell osp instance . 755.36 |================================================ Stream 2013-01-17 Type: Copy MB/s > Higher Is Better combell osp instance . 13350.46 |============================================== Loopback TCP Network Performance Time To Transfer 10GB Via Loopback Seconds < Lower Is Better combell osp instance . 19.95 |================================================= C-Ray 1.1 Total Time Seconds < Lower Is Better combell osp instance . 77.15 |================================================= Gzip Compression 2GB File Compression Seconds < Lower Is Better combell osp instance . 14.71 |=================================================