Re: [HACKERS] Replication documentation addition

I have updated the text. Please let me know what else I should change.
I am unsure if I should be mentioning commercial PostgreSQL products in
our documentation.

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Hannu Krosing wrote:
> ?hel kenal p?eval, T, 2006-10-24 kell 00:20, kirjutas Bruce Momjian:
> > Here is a new replication documentation section I want to add for 8.2:
> >
> > ftp://momjian.us/pub/postgresql/mypatches/replication
>
> This is how data partitioning is currently described there
>
> > Data Partitioning
> > -----------------
> >
> > Data partitioning splits the database into data sets. To achieve
> > replication, each data set can only be modified by one server. For
> > example, data can be partitioned by offices, e.g. London and Paris.
> > While London and Paris servers have all data records, only London can
> > modify London records, and Paris can only modify Paris records. Such
> > partitioning is usually accomplished in application code, though rules
> > and triggers can help enforce partitioning and keep the read-only data
> > sets current. Slony can also be used in such a setup. While Slony
> > replicates only entire tables, London and Paris can be placed in
> > separate tables, and inheritance can be used to access from both tables
> > using a single table name.
>
> Maybe another use of partitioning should also be mentioned. That is ,
> when partitioning is used to overcome limitations of single servers
> (especially IO and memory, but also CPU), and only a subset of data is
> stored and processed on each server.
>
> As an example of this type of partitioning you could mention Bizgres MPP
> (a PG-based commercial product, http://www.greenplum.com ), which
> partitions data to use I/O and CPU of several DB servers for processing
> complex OLAP queries, and Pl_Proxy
> ( http://pgfoundry.org/projects/plproxy/ ) which does the same for OLTP
> loads.
>
> I think the "official" term for this kind of "replication" is
> Shared-Nothing Clustering.
>
> --
> ----------------
> Hannu Krosing
> Database Architect
> Skype Technologies O?
> Akadeemia tee 21 F, Tallinn, 12618, Estonia
>
> Skype me: callto:hkrosing
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>
>
>
>
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--
Bruce Momjian bruce(at)momjian(dot)us
EnterpriseDB http://www.enterprisedb.com

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