On Tue, Feb 01, 2011 at 04:05:23PM -0600, Stan Hoeppner wrote: > Jon Nelson put forth on 2/1/2011 7:50 AM: > > > The performance will not be the same because. Whenever possible, md > > reads from the outermost portion of the disk -- theoretically the > > fastest portion of the disk (by 2 or 3 times as much as the inner > > tracks) -- and in this way raid10,f2 can actually be faster than > > raid0. > > Faster in what regard? I assume you mean purely sequential read, and not random > IOPS. The access patterns of the vast majority of workloads are random, so I > don't see much real world benefit, if what you say is correct. This might > benefit MythTV or similar niche streaming apps. It is mostly interesting for workstations, where one user is the sole user of the system But it is also interesting for a server, where the client is interested in the completion time for a single request. The faster processing of a sequential reads is significant, as far as I can tell. Best regards keld -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
