On Sat, Mar 19, 2016 at 4:29 AM, Scott Marlowe <scott.marlowe@gmail.com> wrote:
> Given the size of your bonnie test set and the fact that you're using
> RAID-10, the cache should make little or no difference. The RAID
> controller may or may not interleave reads between all four drives.
> Some do, some don't. It looks to me like yours doesn't. I.e. when
> reading it's not reading all 4 disks at once, but just 2, 1 from each
> pair.
Point of clarification. It may be that if two processes are reading
the data set at once you'd get a sustained individual throughput that
matches what a single read can get.