On Sat, Jan 17, 2015 at 9:53 PM, Robert Mustacchi <[email protected]> wrote:
> > In this case, you need to make sure you're doing an apples to oranges > comparison. By default all disk I/O that a KVM instance does is > synchronous I/O. If your test in the global zone isn't doing synchronous > I/O, then it's not going to be a like for like comparison. How are you > performing your comparisons? > I was doing a real simple : sync; dd if=/dev/zero of=tempfile bs=1M count= 1024; sync The reason I started doing some digging is that the webGUI I use to manage my centos servers was timing out when performing change in ownership on parts of the filesystem in a SmartOS KVM container. In very simple terms, the webGUI is doing a "chgrp group /somedirectory". I mounted the same volume in SmartOS smartmachine using lofs and the chgrp command completed in like 2 seconds. If you don't have a slog in your machine, and you care about guest I/O > performance, then I'd look at that. > This machine doesn't have an SSD slog, so maybe it needs one. Thank, Greg ------------------------------------------- smartos-discuss Archives: https://www.listbox.com/member/archive/184463/=now RSS Feed: https://www.listbox.com/member/archive/rss/184463/25769125-55cfbc00 Modify Your Subscription: https://www.listbox.com/member/?member_id=25769125&id_secret=25769125-7688e9fb Powered by Listbox: http://www.listbox.com
