On 04/03/2013 03:18 PM, Stan Hoeppner wrote: > You didn't mention your stripe_cache_size value. It'll make a lot of > difference. Make sure it's at least 4096. The default is 256. I'm not getting it - why would stripe cache size matter in a random read/write test? If the disks are large enough and the pattern is really random, the cache should hardly ever be hit (s_c_z = 4096 =^ 16MB cache per disk, that's 0.01% of disk size for a 160GB SSD). I read that Peter confirmed the influence of stripe_cache_size, but I'd like to understand why it matters in this case. Martin -- 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
