[pgpool-general: 4316] Re: Parallel Query mode & data partitioning

Bert biertie at gmail.com
Sat Jan 9 00:05:49 JST 2016


You could do the same thing in one server: Check out the partitioning
feature in Postgresql.
For timeseries I would use PostgreSQL 9.5's BRIN indexes. If you can switch
some default btree indexes to BRIn indexes you would already save some
storage space also.


On Fri, Jan 8, 2016 at 4:01 PM, Pablo Sanchez <pablo at blueoakdb.com> wrote:

> [ Comments below, in-line ]
> On 01/08/2016 09:36 AM, Pavels Gurskis wrote:
>> Hi,
> Hi Paul,
> [ Inquiry about data partitioning ]
> IMO, where pgpool-II really shines is being able to distribute
> read-only queries across a Streaming Replication set up.  For example,
> A Master database, using synchronous Streaming Replication to keep a
> Slave up to date.  I'm not sure how you plan on leveraging pgpool-II.
> For example, let's say you have a single PG Instance.  Initially
> you'll set up the DB server with fast and slow storage.  You'll create
> your partitions on the respective storage.
> Next, you'll populate the data.  Supposing you have three months
> total, your initial partition definitions will place the data in the
> respective partitions:  slow vs fast storage.
> After one month, you'll want to manually move the previous month over
> to the slower storage and place new data into the fast storage.
> I think the above handles what you want to do.  But only with a single
> PG Instance.
> If you set up synchronous Streaming Replication, you'll need to
> replicate the above in the Slave.  Once done, I think it'd be worth
> introducing pgpool-II to Load Balance read-only queries.
> In short, I don't think you need Parallel Query and/or pgpool-II's
> data partitioning capabilities.  :)  But perhaps I'm wrong.
> Anyway, the above are my thoughts .... a bit of a brainstorming.
> --
> Pablo Sanchez - Blueoak Database Engineering, Inc
> Ph:    819.459.1926         Blog:  http://pablo-blog.blueoakdb.com
> iNum:  883.5100.0990.1054
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Bert Desmet
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