[PATCH] vinyl: do not apply run_count_per_level to the last level

[Konstantin Osipov]

* Vladimir Davydov <vdavydov.dev at gmail.com> [18/11/17 07:05]:
> Currently, run_count_per_level index option is applied to each LSM tree
> level. As a result, we may end up storing each key run_count_per_level
> times at the last level alone, which would result in prohibitive space
> amplification. To avoid that, let's ignore run_count_per_level for the
> last level.
> 
> Note, we have to tweak quite a few vinyl tests, because they implicitly
> relied on the fact that producing run_count_per_level dumps would never
> trigger compaction.

OK to push.

 

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Konstantin Osipov, Moscow, Russia, +7 903 626 22 32
http://tarantool.io - www.twitter.com/kostja_osipov