On 1/22/17 16:38 , 강경원 wrote: > Hello, > > We are testing with "TOSHIBAPX02SMF020" SSD for zfs log disk. > > Although we added this to the smartos, the disk write io was not increased. > > Have you ever experienced this kind of issue with Toshiba? > > Any recommendation for selecting ssd?
We generally recommend looking at write intensive, low capacity drives. The number one requirement is that the drive is power safe. The second requirement is latency. But please remember, when performing any king of I/O benchmark, that you're actually performing _active_ benchmarking. That doesn't mean you just run a test, look at a number, and call it a day. You need to analyze the system and understand why the numbers that you're getting are limiters. Also, it's worth remembering that a slog only will work for synchronous writes. It's very easy to write a benchmark for which a slog will not work at all. Robert ------------------------------------------- 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
