zfs with 3x vdevs and zlog
Isilon hardware utilizing all drives 3x vdev's with 7 drives each and mirrored ssd zlog


zfs with 3x vdevs and zlog: 

	Processor: 2 x Intel Xeon E5-2620 v2 (4 Cores), Motherboard: Xen HVM domU v4.13, Chipset: Intel 440FX 82441FX PMC, Memory: 4096MB, Disk: 30GB, Graphics: bochsdrmfb

	OS: Ubuntu 18.04, Kernel: 4.15.0-128-generic (x86_64), Compiler: GCC 7.5.0, File-System: ext4, Screen Resolution: 1024x768, System Layer: Xen HVM domU 4.13


IOzone 3.465
Record Size: 64Kb - File Size: 2GB - Disk Test: Read Performance
MB/s > Higher Is Better
zfs with 3x vdevs and zlog . 4864.08 |=========================================


IOzone 3.465
Record Size: 64Kb - File Size: 2GB - Disk Test: Write Performance
MB/s > Higher Is Better
zfs with 3x vdevs and zlog . 54.09 |===========================================