On Thu, Mar 29, 2012 at 10:14 AM, Chris Worley <worleys@xxxxxxxxx> wrote: > Sequential merging? Try "randread" instead. Great suggestion. Doing some additional analysis, it does appear that IO's are probably getting merged as I see individual IO requests on the wire of 2-4KB. Googling around this area seems to suggest this kernel behavior isn't something I can disable. So if I honest to goodness *only* want 512B IO, is ioengine=sg the best route? ---chuck -- 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
