ZFS on Hardware RAID

[Borja Marcos]

> On 20 Jan 2019, at 10:24, Maciej Jan Broniarz <gausus at gausus.net> wrote:
> 
> Hi,
> 
> I am thinking about the scenario with ZFS on single disks configured to RAID0 by hw raid.
> Please correct me, if i'm wrong, but HW Raid uses a dedicated unit to process all RAID related work (eg. parity checks).
> With ZFS the job is done by CPU. How significant is the performance loss in that particular case?

Modern CPUs are supercomputers. ZFS performs amazingly well even with the puny CPUs found in some
small computers like the HP MIcroservers.

And there is another advantage with ZFS running on the main processor: end to end error detection and recovery,
especially if you are using ECC memory.




Borja.