Just wanted to share what I ran into. I have LXC containers on a 2x2TB MDRAID1, and I'm also using the raw disk file vs chroot. I managed to cut down my %iowait from a consistent 18-24%, to around 0.8-2%. Changes were adding 'noatime,barrier=0' to the /var/lib/vz mount options, and my drives are...
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