again.... closest head algorithm (today raid1) is good for hard disks but isn´t good for ssd (round robin here is better) but the best algorithm is time based (minimize time to access data) 2011/2/1 Stan Hoeppner <stan@xxxxxxxxxxxxxxxxx>: > 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. > > -- > Stan > -- > 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 > -- Roberto Spadim Spadim Technology / SPAEmpresarial -- 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
