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 Now, userland folks think sync() is faster than fsync() on ext4. I don't hope spread this unrecommended habit widely. -- 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
