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From: Tom Lane <tgl@sss.pgh.pa.us>
To: Peter Geoghegan <pg@bowt.ie>
Cc: Robert Haas <robertmhaas@gmail.com>
Cc: Stephen Frost <sfrost@snowman.net>
Cc: Tomas Vondra <tomas.vondra@2ndquadrant.com>
Cc: Alvaro Herrera <alvherre@2ndquadrant.com>
Cc: Konstantin Knizhnik <k.knizhnik@postgrespro.ru>
Cc: Ashwin Agrawal <aagrawal@pivotal.io>
Cc: PostgreSQL mailing lists <pgsql-hackers@postgresql.org>
Subject: Re: Zedstore - compressed in-core columnar storage
Date: Mon, 15 Apr 2019 15:19:41 -0400
Message-ID: <22678.1555355981@sss.pgh.pa.us> (raw)
In-Reply-To: <CAH2-WznPCX1Kp+SKoPTZ5VH9y=OEA_L+SZ6GO2DLeZasnRCGWQ@mail.gmail.com>
References: <bf4b8f5f-90c9-025d-013c-87cf998204ad@postgrespro.ru>
	<20190409155121.GA4320@alvherre.pgsql>
	<CA+TgmoardtfM+0nfj=g1qrH5khuHP6Oi5ZS546CLx_iQUG620g@mail.gmail.com>
	<20190414162210.6djspkmbspbd4els@development>
	<20190415123424.GD6197@tamriel.snowman.net>
	<30261.1555341038@sss.pgh.pa.us>
	<CA+TgmoYgatemjoKjOGg3wZ91_OkiEwqQ_cM4fGvYmvr9Kc=a3w@mail.gmail.com>
	<20789.1555353343@sss.pgh.pa.us>
	<CAH2-WznPCX1Kp+SKoPTZ5VH9y=OEA_L+SZ6GO2DLeZasnRCGWQ@mail.gmail.com>

Peter Geoghegan <pg@bowt.ie> writes:
> I am also concerned by the broad scope of ZedStore, and I tend to
> agree that it will be difficult to maintain in core. At the same time,
> I think that Andres and Robert are probably right about the difficulty
> of maintaining it outside of core -- that would be difficult to
> impossible as a practical matter.

Perhaps, but we won't know if we don't try.  I think we should try,
and be willing to add hooks and flexibility to core as needed to make
it possible.  Adding such flexibility would be good for other outside
projects that have no chance of (or perhaps no interest in) getting into
core, even if we end up deciding that ZedStore or some other specific
implementation is so useful that it does belong in core.

			regards, tom lane





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