From: Shaun Thomas <sthomas@peak6.com>
To: Greg Spiegelberg <gspiegelberg@gmail.com>
Cc: Marinos Yannikos <mjy@geizhals.at>
Cc: pgsql-performance@postgresql.org
Cc: Svetlin Manavski <svetlin.manavski@gmail.com>
Subject: Re: is parallel union all possible over dblink?
Date: Wed, 29 Jun 2011 14:38:24 -0500
Message-ID: <4E0B7F30.4090208@peak6.com> (raw)
In-Reply-To: <BANLkTin_CFVj24_XX=+o_gZKtTCuqgENQg@mail.gmail.com>
References: <BANLkTimwCWg6LGavaNU3YMJNcBiWppX9UQ@mail.gmail.com>
<op.vxuoogblkhmbxg@klump-pc.ghoffice>
<BANLkTin_CFVj24_XX=+o_gZKtTCuqgENQg@mail.gmail.com>
On 06/29/2011 02:14 PM, Greg Spiegelberg wrote:
> Another alternative is to use GridSQL. I haven't used it myself but
> seen it in action on a large install with 4 backend databases. Pretty
> slick.
We actually demoed this as a proof of concept a while back. Even just
having two instances on the same machine resulted in linear improvements
in execution speed thanks to parallel query execution.
Setting it up is something of a PITA, though, and the metadata database
is completely arbitrary. You basically must use the GridSQL intermediate
layer if you ever want to see your data again. I wouldn't use it for
anything but a reporting database that can be reconstructed if necessary.
--
Shaun Thomas
OptionsHouse | 141 W. Jackson Blvd. | Suite 800 | Chicago IL, 60604
312-676-8870
sthomas@peak6.com
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To: pgsql-performance@postgresql.org
Cc: sthomas@peak6.com, gspiegelberg@gmail.com, mjy@geizhals.at, svetlin.manavski@gmail.com
Subject: Re: is parallel union all possible over dblink?
In-Reply-To: <4E0B7F30.4090208@peak6.com>
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