Hi Ian, I am in the process of testing my pool with synchronous 4k writes and various thread numbers. How do you have your pools configured to with the Evo's as logs ?
Thanks and regards, Andre On Fri, Oct 17, 2014 at 8:31 PM, Ian Collins <[email protected]> wrote: > Andre Sachs via smartos-discuss wrote: > >> Hi >> >> We have a bunch of Samsung EVO 840's that we are trying to use as log >> devices on some old nodes to give them a bit of life. >> >> The nodes are using an LSI 2008 controller and run well. >> >> When we add the EVO as an slog device writes max out at 30Mb/s. We then >> swapped the log for an Intel DC3700 and got 200MB's on the pool. >> >> > I've testes 840's in various places in a pool (I'm currently using them > for cache) and I didn't notice that poor performance as a log. > > Even though they performed reasonably well, I wouldn't use them for logs > because they don't have power loss protection. > > You didn't say how you tested them as logs, which is an important detail. > My testing includes hammering the pool with synchronous 4K writes from one > to 32 threads. > > -- > Ian. > -- Andre Sachs CloudAfrica t: 076 333 1883 ------------------------------------------- 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
