fio.result KVM testing on CentOS Linux 8 via the Phoronix Test Suite. PersistentDisk: Processor: Intel Xeon (4 Cores / 8 Threads), Motherboard: Google Compute Engine, Memory: 30GB, Disk: 107GB PersistentDisk OS: CentOS Linux 8, Kernel: 4.19.150+ (x86_64), Compiler: GCC 8.3.1 20191121, File-System: overlayfs, System Layer: KVM Flexible IO Tester 3.25 Type: Random Write - Engine: Linux AIO - Buffered: No - Direct: Yes - Block Size: 64KB - Disk Target: Default Test Directory MB/s > Higher Is Better PersistentDisk . 64.3 |======================================================== PersistentDisk . 57.4 |================================================== Flexible IO Tester 3.25 Type: Random Write - Engine: Linux AIO - Buffered: No - Direct: Yes - Block Size: 64KB - Disk Target: Default Test Directory IOPS > Higher Is Better PersistentDisk . 1025 |======================================================== PersistentDisk . 915 |================================================== Flexible IO Tester 3.25 Type: Random Write - Engine: Linux AIO - Buffered: No - Direct: Yes - Block Size: 64KB - Disk Target: Tmp-Directory MB/s > Higher Is Better PersistentDisk . 62.2 |======================================================== Flexible IO Tester 3.25 Type: Random Write - Engine: Linux AIO - Buffered: No - Direct: Yes - Block Size: 64KB - Disk Target: Tmp-Directory IOPS > Higher Is Better PersistentDisk . 993 |========================================================= Flexible IO Tester 3.25 Type: Random Write - Engine: Linux AIO - Buffered: No - Direct: Yes - Block Size: 64KB - Disk Target: Mounted-Directory MB/s > Higher Is Better PersistentDisk . 82.4 |======================================================== Flexible IO Tester 3.25 Type: Random Write - Engine: Linux AIO - Buffered: No - Direct: Yes - Block Size: 64KB - Disk Target: Mounted-Directory IOPS > Higher Is Better PersistentDisk . 1315 |========================================================