Hi all, Ben Rockwood wrote: > You want to keep stripes wide to reduce wasted disk space.... but you > also want to keep them narrow to reduce the elements involved in parity > calculation.
I Ben's argument, and the main point IMHO is how the RAID behaves in the degraded state. When a disk fails, that disk's data has to be reconstructed by reading from ALL the other disks of the RAID set. Effectively, for the degraded RAID case, N disks of a RAID are reduced to the performance of one disk only. Also this situation will last until the RAID is reconstructed after replacing the failed disk, which is an argument for not using too large disks (see another thread on this list). Nils _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
