On Mon, 11 Apr 2011 18:57:34 -0700 Linux Raid Study <linuxraid.study@xxxxxxxxx> wrote: > If I use --assume-clean in mdadm, I see performance is 10-15% lower as > compared to the case wherein this option is not specified. When I run > without --assume_clean, I wait until mdadm prints "recovery_done" and > then run IO benchmarks... > > Is perf drop expected? No. And I cannot explain it.... unless the array is so tiny that it all fits in the stripe cache (typically about 1Meg). There really should be no difference. NeilBrown -- 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
