From: Konstantin Osipov <kostja@tarantool.org>
To: Vladimir Davydov <vdavydov.dev@gmail.com>
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 14:06:09 +0300 [thread overview]
Message-ID: <20190206110609.GA24382@chai> (raw)
In-Reply-To: <20190206105244.c4gkhb3xsn2pkqmp@esperanza>
* Vladimir Davydov <vdavydov.dev@gmail.com> [19/02/06 13:57]:
> 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?
I don't know.
> Also, what we should do after restart when there's no history?
Seed the function with the top run size. If there is no top run,
seed with 0.
>
> Why is using the last level size as reference bad?
Because you don't know if it's last or not?
--
Konstantin Osipov, Moscow, Russia, +7 903 626 22 32
http://tarantool.io - www.twitter.com/kostja_osipov
next prev parent reply other threads:[~2019-02-06 11:06 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
2019-02-06 11:06 ` Konstantin Osipov [this message]
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
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20190206110609.GA24382@chai \
--to=kostja@tarantool.org \
--cc=tarantool-patches@freelists.org \
--cc=vdavydov.dev@gmail.com \
--subject='Re: [tarantool-patches] Re: [PATCH 7/9] vinyl: randomize range compaction to avoid IO load spikes' \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox