[tarantool-patches] Re: [PATCH 3/9] vinyl: use uncompressed run size for range split/coalesce/compaction

Konstantin Osipov kostja at tarantool.org
Tue Feb 5 19:43:55 MSK 2019

* Vladimir Davydov <vdavydov.dev at gmail.com> [19/01/21 06:58]:
> Historically, when considering splitting or coalescing a range or
> updating compaction priority, we use sizes of compressed runs (see
> bytes_compressed). This makes the algorithms dependent on whether
> compression is used or not and how effective it is, which is weird,
> because compression is a way of storing data on disk - it shouldn't
> affect the way data is partitioned. E.g. if we turned off compression
> at the first LSM tree level, which would make sense, because it's
> relatively small, we would affect the compaction algorithm because
> of this.

OK to push.

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

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