Hi Radoslaw,
On Wed, 08 Jun 2011 07:30:33 +0200, Radosław Smogura
<rsmogura@softperience.eu> wrote:
>
> But, I think GreenPlum is "share nothing", isn't it?
Yes, indeed. In very simple words Greenplum is a parallel processing
database solution that implements the "shared-nothing" architecture. One
master server is responsible for managing data distribution and query
processing among several segments - usually residing on multiple servers
(that do not share any physical resource, but the network). The shared
nothing architecture allows the system to be linearly scalable by adding
commodity hardware to the cluster.
There is a special version of Greenplum (Greenplum Community Edition)
that can be used for testing and development (the license allows usage
in production environments as well under certain circumstances - for
instance research). Greenplum is owned by EMC and is not open-source.
Greenplum typical usage is for data warehousing purposes, as main
source for business intelligence and analytics query. If you are
interested in topics like this, I suggest that you participate to
Char(11) (www.char11.org), the second edition of the Clustering, High
Availability and Replication conference.
Cheers,
Gabriele
--
Gabriele Bartolini - 2ndQuadrant Italia
PostgreSQL Training, Services and Support
Gabriele.Bartolini@2ndQuadrant.it - www.2ndQuadrant.it