It would also be worth checking if you have a mismatch (or misalignment) on block size. If the disk is 4k physical, and you have an ashift=9 pool, you'll lose even more iops to internal rmw cycles.
On Wed., 28 Mar. 2018, 07:10 Ian Collins, <[email protected]> wrote: > On 03/28/2018 09:04 AM, Jeremy wrote: > > The disk is now very fast, only 5400 rpm. I have not done any tests yet. I > was running hyper-v on the same system with much faster performance, but I > suspect these are probably not comparable. > > > In SmartOS, KVM writes are synchronous, so performance will suffer (you > will be IOP bound) on a slow drive without a log device. > > -- > Ian. > *smartos-discuss* | Archives > <https://www.listbox.com/member/archive/184463/=now> | Modify > <https://www.listbox.com/member/?&;> > Your Subscription <http://www.listbox.com> > ------------------------------------------- smartos-discuss Archives: https://www.listbox.com/member/archive/184463/=now Modify Your Subscription: https://www.listbox.com/member/?member_id=25769125&id_secret=25769125-7688e9fb Powered by Listbox: http://www.listbox.com
