fio-test docker VMware testing on Ubuntu 16.04.3 LTS via the Phoronix Test Suite. Virtual disk: Processor: 4 x Intel Xeon E5645 @ 2.40GHz (4 Cores), Motherboard: Intel 440BX, Memory: 16384MB, Disk: 54GB Virtual disk OS: Ubuntu 16.04.3 LTS, Kernel: 4.9.67-rancher (x86_64), Compiler: GCC 5.4.0 20160609, File-System: overlayfs, System Layer: docker VMware Flexible IO Tester 2.1.13 Type: Random Read - IO Engine: Libaio - Buffered: No - Direct: Yes - Block Size: 4KB - Disk Target: Default Test Directory IOPS > Higher Is Better Virtual disk . 35150 |========================================================= Flexible IO Tester 2.1.13 Type: Random Write - IO Engine: Libaio - Buffered: No - Direct: Yes - Block Size: 4KB - Disk Target: Default Test Directory IOPS > Higher Is Better Virtual disk . 36551 |========================================================= Flexible IO Tester 2.1.13 Type: Sequential Read - IO Engine: Libaio - Buffered: No - Direct: Yes - Block Size: 4KB - Disk Target: Default Test Directory IOPS > Higher Is Better Virtual disk . 52645 |========================================================= Flexible IO Tester 2.1.13 Type: Sequential Write - IO Engine: Libaio - Buffered: No - Direct: Yes - Block Size: 4KB - Disk Target: Default Test Directory IOPS > Higher Is Better Virtual disk . 44879 |========================================================= Flexible IO Tester 2.1.13 Type: Random Read - IO Engine: Libaio - Buffered: No - Direct: Yes - Block Size: 4KB - Disk Target: Default Test Directory MB/s > Higher Is Better Virtual disk . 140.62 |======================================================== Flexible IO Tester 2.1.13 Type: Random Write - IO Engine: Libaio - Buffered: No - Direct: Yes - Block Size: 4KB - Disk Target: Default Test Directory MB/s > Higher Is Better Virtual disk . 146.22 |======================================================== Flexible IO Tester 2.1.13 Type: Sequential Read - IO Engine: Libaio - Buffered: No - Direct: Yes - Block Size: 4KB - Disk Target: Default Test Directory MB/s > Higher Is Better Virtual disk . 210.59 |======================================================== Flexible IO Tester 2.1.13 Type: Sequential Write - IO Engine: Libaio - Buffered: No - Direct: Yes - Block Size: 4KB - Disk Target: Default Test Directory MB/s > Higher Is Better Virtual disk . 179.53 |========================================================