> > However, I've one more question - do you guys think NCQ with short > stroked zones help or hurt performance? I have this feeling (my > gut, that is), that at a low queue depth it's a Great Win, whereas > at a deeper queue it would degrade performance more so than without > it. Any thoughts?
Depends on the workload. In general NCQ helps random read and hurts sequential reads: http://blogs.sun.com/erickustarz/entry/ncq_performance_analysis eric _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
