One thing to note, is that linux's md sets the readahead to 8192 by default instead of 128. I've noticed that in many situations, a large chunk of the performance boost reported is due to this alone.
On 2/18/09 12:57 AM, "Grzegorz Jaśkiewicz" <gryz...@gmail.com> wrote: have you tried hanging bunch of raid1 to linux's md, and let it do raid0 for you ? I heard plenty of stories where this actually sped up performance. One noticeable is case of youtube servers.
