On Sun, Oct 4, 2009 at 3:40 PM, Chris Worley <worleys@xxxxxxxxx> wrote: > When you mirror two devices, they may not have the same performance. > For example, if one device is local and the other remote. > > There's nothing you can do about writes, as everything needs written. > > But, reads shouldn't be split 50/50: they should be balanced depending > relative performance of each mirror to optimize overall read > performance. And MD already has the ability to flag the slow paths as write-mostly, see: mdadm ... --write-mostly There is also '--write-behind' support for devices that have been tagged as 'write-mostly'. -- 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
