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From Josh Elser <josh.el...@gmail.com>
Subject Re: [DISCUSS] Question about 1.7 bugfix releases
Date Tue, 06 Jun 2017 17:07:22 GMT
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

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