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From: Konstantin Osipov <kostja@tarantool.org>
To: tarantool-patches@freelists.org
Cc: Serge Petrenko <sergepetrenko@tarantool.org>
Subject: [tarantool-patches] Re: [PATCH v2] iproto: introduce a proxy module.
Date: Tue, 16 Oct 2018 21:42:14 +0300	[thread overview]
Message-ID: <20181016184214.GF5454@chai> (raw)
In-Reply-To: <20181008194515.h5tgx7erp5ryjywp@esperanza>

* Vladimir Davydov <vdavydov.dev@gmail.com> [18/10/11 09:55]:
> I may be wrong, but I think that using a hash table for mapping client
> connection syncs to server connection syncs, like you do here, may hurt
> performance (think of thousands requests in flight). If we really want
> to multiplex, I'd rather consider extending xrow_header with something
> like connection_id. This might need some benchmarking though.

This is a typical approach used in other proxies. My guess is that
hashing an integer sync has very low overhead compared to the
overall cost of sending/receiving it. Besides, let's keep in mind
that a proxy is usually stateless so you can have many of them,
and CPU on a proxy is cheap. Basically, the principle should be
that as much work as possible should be done on a proxy.

> > +		coio_write_iproto_response(&con->output, &row);
> > +
> > +		fiber_gc();
> > +	}
> > +	return 0;
> > +}

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

  reply	other threads:[~2018-10-16 18:42 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-10-02 18:05 [tarantool-patches] " Serge Petrenko
2018-10-03  8:49 ` Vladimir Davydov
2018-10-04 11:54 ` [tarantool-patches] " Georgy Kirichenko
2018-10-08 10:44 ` [tarantool-patches] " Vladimir Davydov
2018-10-16 18:35   ` [tarantool-patches] " Konstantin Osipov
2018-10-08 16:48 ` [tarantool-patches] " Vladimir Davydov
2018-10-16 18:39   ` [tarantool-patches] " Konstantin Osipov
2018-10-17  8:35     ` Vladimir Davydov
2018-10-17 15:31       ` Konstantin Osipov
2018-10-08 19:45 ` [tarantool-patches] " Vladimir Davydov
2018-10-16 18:42   ` Konstantin Osipov [this message]
2018-10-23 17:26 ` [tarantool-patches] " Konstantin Osipov

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