On Wed, Jul 16, 2008 at 05:18:46PM +1200, Richard Scobie wrote: > Keld Jørn Simonsen wrote: > > >My understanding tho, is that the IO output and input figures are on > >sequential IO. There are no figures on random IO, > > If you look at some results Justin posted: > > http://home.comcast.net/~jpiszcz/20080707/veliciraptors_with_x4.html > > The column "Random Create" shows performance for randomly creating, > reading and deleting 16384 files sized between 16bytes and 1MB > distributed randomly through 64 directories (this is the -n parameter > and is shown in the "Num Files" column.) Yes, but these are not random IO in the sense that I meant it, which was unclear. These are specific system calls, delete, and seeks, with some IO on the inodes and maybe releasing blocks to the empty block list. I meant to say: There are no tests in bonnie++ that measures random read and write thruput. 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
