i'm not sure, but maybe the problem is the same of small chunk size of raid-0 the head move a lot for small works, while it could move less and do many job but i'm not sure about it 2013/8/18 Ian Pilcher <arequipeno@xxxxxxxxx>: > Can anyone point me to a good explanation of the read performance impact > of small (RAID-5 and RAID-6) chunk sizes? > > I understand why large chunks hurt write performance, but I haven't been > able to reason through the small-chunk/read case, and my Interweb > searches haven't really turned anything up. > > The "read penalty" is definitely there; I can see it in the test data > from my NAS. I just don't understand *why* it's there. > > Thanks! > > -- > ======================================================================== > Ian Pilcher arequipeno@xxxxxxxxx > Sometimes there's nothing left to do but crash and burn...or die trying. > ======================================================================== > > -- > 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 -- 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
