From: Vladimir Davydov <vdavydov.dev@gmail.com> To: Konstantin Osipov <kostja@tarantool.org> Cc: tarantool-patches@freelists.org Subject: Re: [tarantool-patches] Re: [PATCH 7/9] vinyl: randomize range compaction to avoid IO load spikes Date: Wed, 6 Feb 2019 13:52:44 +0300 [thread overview] Message-ID: <20190206105244.c4gkhb3xsn2pkqmp@esperanza> (raw) In-Reply-To: <20190206104419.GD19953@chai> On Wed, Feb 06, 2019 at 01:44:19PM +0300, Konstantin Osipov wrote: > * Vladimir Davydov <vdavydov.dev@gmail.com> [19/02/06 13:31]: > > Over how many dumps? What do we do after restart, when there's no > > history and perhaps even no level 1? > > A am thinking about something along these lines: > f(n+1) = (f(n) + x*k)(1+k) - where k is the weight used to scale > the next input What should be k equal to? Also, what we should do after restart when there's no history? Why is using the last level size as reference bad? > > alternatively: > > f(n+1) = sqrt((f(n)^2 + x^2)/2)
next prev parent reply other threads:[~2019-02-06 10:52 UTC|newest] Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top 2019-01-20 21:16 [PATCH 0/9] vinyl: compaction randomization and throttling Vladimir Davydov 2019-01-20 21:17 ` [PATCH 1/9] vinyl: update lsm->range_heap in one go on dump completion Vladimir Davydov 2019-01-24 16:55 ` Vladimir Davydov 2019-02-05 16:37 ` [tarantool-patches] " Konstantin Osipov 2019-01-20 21:17 ` [PATCH 2/9] vinyl: ignore unknown .run, .index and .vylog keys Vladimir Davydov 2019-01-24 16:56 ` Vladimir Davydov 2019-01-20 21:17 ` [PATCH 3/9] vinyl: use uncompressed run size for range split/coalesce/compaction Vladimir Davydov 2019-01-21 9:42 ` Vladimir Davydov 2019-02-05 16:49 ` [tarantool-patches] " Konstantin Osipov 2019-02-06 8:55 ` Vladimir Davydov 2019-02-06 10:46 ` Konstantin Osipov 2019-02-06 10:55 ` Vladimir Davydov 2019-02-05 16:43 ` Konstantin Osipov 2019-02-06 16:48 ` Vladimir Davydov 2019-01-20 21:17 ` [PATCH 4/9] vinyl: rename lsm->range_heap to max_compaction_priority Vladimir Davydov 2019-01-20 21:17 ` [PATCH 5/9] vinyl: keep track of dumps per compaction for each LSM tree Vladimir Davydov 2019-02-05 16:58 ` [tarantool-patches] " Konstantin Osipov 2019-02-06 9:20 ` Vladimir Davydov 2019-02-06 16:54 ` Vladimir Davydov 2019-01-20 21:17 ` [PATCH 6/9] vinyl: set range size automatically Vladimir Davydov 2019-01-22 9:17 ` Vladimir Davydov 2019-02-05 17:09 ` [tarantool-patches] " Konstantin Osipov 2019-02-06 9:23 ` Vladimir Davydov 2019-02-06 17:04 ` Vladimir Davydov 2019-01-20 21:17 ` [PATCH 7/9] vinyl: randomize range compaction to avoid IO load spikes Vladimir Davydov 2019-01-22 12:54 ` Vladimir Davydov 2019-02-05 17:39 ` [tarantool-patches] " Konstantin Osipov 2019-02-06 8:53 ` Vladimir Davydov 2019-02-06 10:44 ` Konstantin Osipov 2019-02-06 10:52 ` Vladimir Davydov [this message] 2019-02-06 11:06 ` Konstantin Osipov 2019-02-06 11:49 ` Vladimir Davydov 2019-02-06 13:43 ` Konstantin Osipov 2019-02-06 14:00 ` Vladimir Davydov 2019-02-05 17:14 ` Konstantin Osipov 2019-01-20 21:17 ` [PATCH 8/9] vinyl: introduce quota consumer types Vladimir Davydov 2019-01-20 21:17 ` [PATCH 9/9] vinyl: throttle tx to ensure compaction keeps up with dumps Vladimir Davydov 2019-01-21 14:14 ` Vladimir Davydov 2019-01-22 9:09 ` Vladimir Davydov
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