cascade-snapshots
Test the effect of taking multiple cascaded snapshots on disk write performance. A 4G file is created between each snapshot.


Before Snapshots: 

	Processor: Intel Xeon E5-2660 v3 @ 2.59GHz (1 Core), Motherboard: Intel 440BX (6.00 BIOS), Chipset: Intel 440BX/ZX/DX, Memory: 4096MB, Disk: 59GB Virtual disk, Graphics: llvmpipe 3968MB, Network: Intel 82545EM Gigabit

	OS: Ubuntu 18.04, Kernel: 4.15.0-22-generic (x86_64), OpenGL: 3.0 Mesa 18.0.0-rc5 (LLVM 6.0 256 bits), Compiler: GCC 7.3.0, File-System: ext4, Screen Resolution: 1176x885, System Layer: VMware

After 1st snapshot: 

	Processor: Intel Xeon E5-2660 v3 @ 2.59GHz (1 Core), Motherboard: Intel 440BX (6.00 BIOS), Chipset: Intel 440BX/ZX/DX, Memory: 4096MB, Disk: 59GB Virtual disk, Graphics: llvmpipe 3968MB, Network: Intel 82545EM Gigabit

	OS: Ubuntu 18.04, Kernel: 4.15.0-22-generic (x86_64), OpenGL: 3.0 Mesa 18.0.0-rc5 (LLVM 6.0 256 bits), Compiler: GCC 7.3.0, File-System: ext4, Screen Resolution: 1176x885, System Layer: VMware

After 2nd snapshot: 

	Processor: Intel Xeon E5-2660 v3 @ 2.59GHz (1 Core), Motherboard: Intel 440BX (6.00 BIOS), Chipset: Intel 440BX/ZX/DX, Memory: 4096MB, Disk: 59GB Virtual disk, Graphics: llvmpipe 3968MB, Network: Intel 82545EM Gigabit

	OS: Ubuntu 18.04, Kernel: 4.15.0-22-generic (x86_64), OpenGL: 3.0 Mesa 18.0.0-rc5 (LLVM 6.0 256 bits), Compiler: GCC 7.3.0, File-System: ext4, Screen Resolution: 1176x885, System Layer: VMware


AIO-Stress 0.21
Test: Random Write
MB/s > Higher Is Better
Before Snapshots ... 510.35 |==================================================
After 1st snapshot . 257.92 |=========================
After 2nd snapshot . 342.21 |==================================