On Wed, 28 Apr 2010, Jim Horng wrote:
I understand your point. however in most production system the selves are added incrementally so make sense to be related to number of slots per shelf. and in most case withstand a shelf failure is to much of overhead on storage any are. for example in his case he will have to configure 1+0 raid with only two shelves. i.e. 50% overhead.
Yes, I can see that with 48 drives per shelf, the opportunities for creative natural fault isolation are less available. It is also true that often hardware is added incrementally.
A strong argument can be made that smaller less capable simplex-routed shelves may be a more cost effective and reliable solution when used carefully with zfs. For example, mini-shelves which support 8 drives each.
Bob -- Bob Friesenhahn bfrie...@simple.dallas.tx.us, 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
