This makes several improvement and I will be listing them here and do note of the differences as there are some improvement with changes to existing VSAN 5.5.
To start clear, we need to know the terms right. You will often hear Hybrid VSAN and All-Flash VSAN. Hybrid is not new. Since VSAN 5.5, it is always in Hybrid VSAN. What it means it's a mixed of Flash or Solid State Harddisk (SSD) for cache and Magnetic Disk (MD) for persistent data.
What about All-Flash, this is new in VSAN 6.0. There will be no MD but make of all Flash/SSD for flash and SSD for persistent.
source: VMware, Inc
In VSAN 5.5, the cache read/write ratio was 70/30. This is fixed and cannot be changed. Of course in a VDI environment, this will be less favorable though it is using flash/SDD for cache since only 30% of the cache is used for write cache in a write intensive VDI environment.
In VSAN 6.0, th…