From: Konstantin Osipov <kostja@tarantool.org>
To: Vladimir Davydov <vdavydov.dev@gmail.com>
Cc: tarantool-patches@freelists.org
Subject: Re: [PATCH 5/6] space: call before_replace trigger even if space has no indexes
Date: Sat, 21 Jul 2018 23:59:48 +0300 [thread overview]
Message-ID: <20180721205948.GA6906@chai> (raw)
In-Reply-To: <20180721122652.rll2tshmcsbhzsfn@esperanza>
* Vladimir Davydov <vdavydov.dev@gmail.com> [18/07/21 23:52]:
> On Fri, Jul 20, 2018 at 09:39:09PM +0300, Konstantin Osipov wrote:
> > * Vladimir Davydov <vdavydov.dev@gmail.com> [18/07/20 20:45]:
> > > Needed for blackhole spaces (see the next patch), which don't support
> > > indexes per se, but still may have a before_replace trigger installed.
> >
> > Why do you need to enable before replace triggers for blackhole?
>
> Why not? before_replace can be installed on a blackhole space so
> I guess it should work, otherwise it may raise questions.
>
> > What's wrong with on_replace triggers?
>
> Nothing wrong at all. They work as well.
OK, maybe I'm a performance junkie, but I saw you had to
pessimize before_replace to add support for blackhole, and thought
for a minute that for the task at hand you could get by with
on_replace(). Now I realize your patch is off the hot path,
before_replace is expensive because it makes a lookup, not
because there's a few branches here and there.
Thanks, it's OK to push this patch as well then. I assume you will
be adding a test case for space-with-no-indexes in a later patch?
--
Konstantin Osipov, Moscow, Russia, +7 903 626 22 32
http://tarantool.io - www.twitter.com/kostja_osipov
next prev parent reply other threads:[~2018-07-21 20:59 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-07-20 17:43 [PATCH 0/6] Introduce blackhole engine Vladimir Davydov
2018-07-20 17:43 ` [PATCH 1/6] Add generic engine, space, index method stubs Vladimir Davydov
2018-07-20 17:56 ` Konstantin Osipov
2018-07-21 12:24 ` Vladimir Davydov
2018-07-20 17:43 ` [PATCH 2/6] Merge sysview_index.[hc] and sysview_engine.[hc] Vladimir Davydov
2018-07-20 18:02 ` Konstantin Osipov
2018-07-21 12:24 ` Vladimir Davydov
2018-07-20 17:43 ` [PATCH 3/6] Rework memtx replace function Vladimir Davydov
2018-07-20 18:04 ` Konstantin Osipov
2018-07-21 12:24 ` Vladimir Davydov
2018-07-20 17:43 ` [PATCH 4/6] txn: unify txn_stmt tuples reference counting rules Vladimir Davydov
2018-07-20 18:31 ` Konstantin Osipov
2018-07-21 12:24 ` Vladimir Davydov
2018-07-20 17:43 ` [PATCH 5/6] space: call before_replace trigger even if space has no indexes Vladimir Davydov
2018-07-20 18:39 ` Konstantin Osipov
2018-07-21 12:26 ` Vladimir Davydov
2018-07-21 20:59 ` Konstantin Osipov [this message]
2018-07-23 10:15 ` Vladimir Davydov
2018-07-20 17:43 ` [PATCH 6/6] Introduce blackhole engine Vladimir Davydov
2018-07-20 18:42 ` Konstantin Osipov
2018-07-21 12:35 ` Vladimir Davydov
2018-07-23 11:02 ` Vladimir Davydov
2018-07-23 12:53 ` Vladimir Davydov
2018-07-23 18:30 ` [PATCH 0/6] " Konstantin Osipov
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