On Tue, Jun 6, 2017 at 12:07 PM, Josh Elser <josh.el...@gmail.com> wrote: > On 6/6/17 12:39 PM, Sean Busbey wrote: >> >> For example, has anyone done perf comparisons between 1.7 and 1.8.z? >> >> When it came time for me to start telling folks that it was "safe" to >> upgrade to 1.7.z I ran into something like a 40-60% perf degradation >> on writes compared to 1.6 across the board. A little bit of this was >> already fixed in 1.8 at the time, but a substantial amount required a >> non-trivial refactoring because just no one had looked[1]. Even after >> all of that, I still had to caveat things because I still saw a >> ~15-30% perf drop on random writes in the presence of lots of columns. > > > At a risk of de-railing otherwise good discussion on releases: do you recall > if you had accounted for the following, Sean? (notably, the last code > snippet) > > https://accumulo.apache.org/blog/2016/11/02/durability-performance.html
I know that "set durability to flush and not sync" was one of the parameters for the comparison, but I don't remember what was done specifically during the testing back in September, tbh. I can probably dig it out if you'd like; I think we were pretty good at keeping notes. Probably something for a different thread? -- busbey
