KOSAKI Motohiro <kosaki.motohiro@xxxxxxxxxxxxxx> writes: > Hi Jeff, > >> This patch series addresses a performance problem experienced when running >> io_zone with small file sizes (from 4KB up to 8MB) and including fsync in >> the timings. A good example of this would be the following command line: >> iozone -s 64 -e -f /mnt/test/iozone.0 -i 0 >> As the file sizes get larger, the performance improves. By the time the >> file size is 16MB, there is no difference in performance between runs >> using CFQ and runs using deadline. The storage in my testing was a NetApp >> array connected via a single fibre channel link. When testing against a >> single SATA disk, the performance difference is not apparent. > > offtopic: > > Can this patch help to reduce a pain of following much small files issue? > > http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=578635 Perhaps. I don't have a debian system handy to test that, though. Cheers, Jeff -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
