zvol128k-ext4 KVM QEMU testing on Debian 8.6 via the Phoronix Test Suite. zvol128k-ext4: Processor: 4 x QEMU Virtual 2.5+ @ 2.93GHz (4 Cores), Chipset: Intel 440FX- 82441FX PMC, Memory: 1 x 4096 MB RAM QEMU, Disk: 99GB, Graphics: Cirrus Logic GD 5446, Network: Red Hat Virtio device OS: Debian 8.6, Kernel: 4.7.5-xenU (x86_64), Compiler: GCC 4.9.2 + Clang 3.5.0-10, File-System: ext4, Screen Resolution: 800x600, System Layer: KVM QEMU AIO-Stress 0.21 Random Write MB/s > Higher Is Better zvol128k-ext4 . 1176.13 |====================================================== SQLite 3.8.10.2 Timed SQLite Insertions Seconds < Lower Is Better zvol128k-ext4 . 5.15 |========================================================= FS-Mark 3.3 1000 Files, 1MB Size Files/s > Higher Is Better zvol128k-ext4 . 467.25 |======================================================= Dbench 4.0 12 Clients MB/s > Higher Is Better zvol128k-ext4 . 1808.35 |====================================================== Dbench 4.0 48 Clients MB/s > Higher Is Better zvol128k-ext4 . 1873.42 |====================================================== Dbench 4.0 128 Clients MB/s > Higher Is Better zvol128k-ext4 . 1973.13 |====================================================== Dbench 4.0 1 Clients MB/s > Higher Is Better zvol128k-ext4 . 538.11 |======================================================= IOzone 3.405 8GB Read Performance MB/s > Higher Is Better zvol128k-ext4 . 1064.23 |====================================================== IOzone 3.405 8GB Write Performance MB/s > Higher Is Better zvol128k-ext4 . 380.09 |======================================================= Threaded I/O Tester 0.3.3 64MB Random Read - 32 Threads MB/s > Higher Is Better zvol128k-ext4 . 4704.68 |====================================================== Threaded I/O Tester 0.3.3 64MB Random Write - 32 Threads MB/s > Higher Is Better zvol128k-ext4 . 125.28 |======================================================= Compile Bench 0.6 Test: Compile MB/s > Higher Is Better zvol128k-ext4 . 297.78 |======================================================= Compile Bench 0.6 Test: Initial Create MB/s > Higher Is Better zvol128k-ext4 . 161.87 |======================================================= Compile Bench 0.6 Test: Read Compiled Tree MB/s > Higher Is Better zvol128k-ext4 . 649.67 |======================================================= Unpacking The Linux Kernel linux-2.6.32.tar.bz2 Seconds < Lower Is Better zvol128k-ext4 . 10.86 |======================================================== PostMark 1.51 Disk Transaction Performance TPS > Higher Is Better zvol128k-ext4 . 4286 |========================================================= Gzip Compression 2GB File Compression Seconds < Lower Is Better zvol128k-ext4 . 16.48 |======================================================== Apache Benchmark 2.4.7 Static Web Page Serving Requests Per Second > Higher Is Better zvol128k-ext4 . 11282.38 |=====================================================