Mathias Burén put forth on 1/30/2011 1:41 PM: > Thanks. New results up for those interested: > http://stuff.dyndns.org/logs/bonnie_results.html Three things I notice: 1. You're CPU bound across the board, for all the tests that matter anyway 2. Because of this, your performance spread is less than 5% across the board meaning any optimizations are useless 3. Is that a 7 Gigabyte chunk size? That's totally unrealistic. It should be less than 1 MB for almost all workloads. According to those numbers, you can swap SATA controllers and PCIe bus slot assignments all day long, but you'll gain nothing without a faster CPU. Why are you using a 7 Gigabyte chunk size? And if the other OP was correct about the 768MB stripe cache, that's totally unrealistic as well. And in real world use, you don't want a high readahead setting. It just wastes buffer cache memory for no gain (except maybe in some synthetic benchmarks). -- Stan -- 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
