for SSD without inteligent parts (cache and queue) i think this could works nice... (at least in theory) for USB sticks and microsd cards may work too... 2012/7/2 Shaohua Li <shli@xxxxxxxxxx>: > On Sun, Jul 01, 2012 at 11:13:42PM -0300, Roberto Spadim wrote: >> nice =) very very nice =) >> maybe to get better than this... select the disk with min(pending time) >> >> time could be estimated with something like: >> (distance * time/distance unit) + (blocks to read/write * time to >> read/write 1 block) + (non sequencial penalty time) > > I didn't think there is way to measure request time. Disks support NCQ, they > can dispatch several requests at one time and finish them almost at the same > time. I used to measure this time (to make CFQ ioscheduler self tune), but > failed. > > Thanks, > Shaohua > -- > 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
