On Wed, Jun 18, 2008 at 07:37:38PM -0700, Anil Jangity wrote: > Why is it that the read operations are 0 but the read bandwidth is >0? > What is iostat > [not] accounting for? Is it the metadata reads? (Is it possible to > determine what kind of metadata > reads these are?
That question I'll leave for others to answer. > I plan to have 3 disks and am debating what I should do with them, if I > should do a > raidz (single or double parity) or just a mirror. > > With the # of reads below, I don't see any reason why I should consider > that. I would like to > proceed with doing a raidz with double parity, please give me some feedback. A three-way mirror and three disks in a double parity array are going to get you the same usable space. They are going to get you the same level of redundancy. The only difference is that the RAIDZ2 is going to consume a lot more CPU cycles calculating parity for no good cause. In this case, a three-way mirror is the way to go. -brian -- "Coding in C is like sending a 3 year old to do groceries. You gotta tell them exactly what you want or you'll end up with a cupboard full of pop tarts and pancake mix." -- IRC User (http://www.bash.org/?841435) _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
