[pve-devel] new cache benchmark results

[Dietmar Maurer]

> Note : with shared storage, with writeback, I generally see big spike (faster
> than cache=none), but after big slowdown (near zero) during 5-10s.
>        So I think this is when the host need to flush the datas, it add more
> overhead. (maybe network latency have an impact...)

Another problem with cache=none is that it does not work with 4K sector drives.

User reported problems with 4K iscsi and 4K local disks.

Any idea how to solve that?