> On Sep 30, 2016, at 7:43 PM, Matthew Parsons <matt...@aspergerexperts.com> > wrote: > > FWIW, the main production workload that I will care about is a not-well > threaded java server app, so single-threaded performance, coupled with a > large-ish MySQL DB with frequent, random I/O both read and write. > > I went down the rabbit-hole of attempting to to use the Phoronix Test Suite > since it "supports" Solaris and BSD, has some pre-defined Java and Database > test setups, and can compare to publicly recorded reports. However chasing > down the dependencies and chasing down the various "this test failed" errors > was taking up too much time. Looks like I'll stick w/ Bonnie++ and IOZone via > PkgSrc. (Which means I'll have to start over w/ CentOS)
My experience is that unless you're running something that's completely and utterly canned (no tweaking whatsoever to get it working), there is too much of a repeatability gap to compare with other people's results, so you're back to running all your test cases yourself. I'd check to see if Bonnie++ and IOZone are complex enough to give you a serious workout (and of course you need to read and write stuff that's bigger than your disk cache, which in ZFS land is "approaching the size of your RAM"), so be skeptical of numbers that sound really good. Be prepared for some surprises though. I hear people talk so much about needing an slog to get decent performance that I decided to do a bakeoff with a test case of running compiles. The result was a measurable-but-not-significant performance hit (no, I didn't run multiple times) for adding an slog, and a measurable-but-not-significant performance improvement for going all-SSD. On a database load, with synchronous writes, your mileage will of course vary. More here: https://technotes.seastrom.com/2016/09/21/disk-isnt-the-long-pole.html -r ------------------------------------------- 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
