On Wed, Mar 13, 2013 at 03:32:02PM -0700, Brian Buhrow wrote: > hello. What I'm seeing is that the underlying disks under both a > raid1 set and a raid5 set are not seeing anymore than 8 active requests at > once across the entire bus of disks. This leaves a lot of disk bandwidth > unused, not to mention less than stellar disk performance. I see that > RAIDOUTSTANDING is defined as 6 if not otherwise defined, and this suggests > that this is the limiting factor, rather than the actual number of requests > allowed to be sent to a component's queue.
It should be the sum of the number of openings on the underlying components, divided by the number of data disks in the set. Well, roughly. Getting it just right is a little harder than that, but I think it's obvious how. Thor
