On Thu, 28 Aug 2008, Miles Nordin wrote: > > you're right in terms of fixed timeouts, but there's no reason it > can't compare the performance of redundant data sources, and if one > vdev performs an order of magnitude slower than another set of vdevs > with sufficient redundancy, stop issuing reads except scrubs/healing > to the underperformer (issue writes only), and pass an event to FMA.
You are saying that I can't split my mirrors between a local disk in Dallas and a remote disk in New York accessed via iSCSI? Why don't you want me to be able to do that? ZFS already backs off from writing to slow vdevs. > ZFS can also compare the performance of a drive to itself over time, > and if the performance suddenly decreases, do the same. While this may be useful for reads, I would hate to disable redundancy just because a device is currently slow. Bob ====================================== Bob Friesenhahn [EMAIL PROTECTED], http://www.simplesystems.org/users/bfriesen/ GraphicsMagick Maintainer, http://www.GraphicsMagick.org/ _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
