On Mon, Jan 11 2010, Gurudas Pai wrote: > >> 3) The third question is why the number of fio reported "merge"(s) is greater than the number of the "ios"? > These merges are since disk is online. not during the current fio run. > Restart the machine/disk and run fio test , then fio should report > accurate merge stats. That's not correct, it is the number of merges that occured while fio was running. What Alan said is correct, the ios count is the issued number of ios. Merges can easily be much larger, for this case of small bs sequential IO it will indeed be pretty huge. -- Jens Axboe -- To unsubscribe from this list: send the line "unsubscribe fio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html