PGD Architectures
=================

With PGD 6 Expanded, you can deploy a cluster in a wide range of
architectures. Unlike PGD 6 Essential, which is limited to two
architectures made with a limited number of groups, PGD 6 Expanded
supports multiple architectures with technically unlimited groups,
including:

- :ref:`Always-On Architecture <Always-On Architecture>`  : A single PGD cluster with two or more groups in the
  same data center or availability zone. This architecture is designed
  for high availability and disaster recovery, ensuring that the
  database remains operational even if one group fails.

- :ref:`PGD Essential architectures <PGD Essential architectures>`  : A single PGD cluster with three nodes in the same data
  center or availability zone; The PGD 6 Essential architecture.

- :ref:`Multi-Location Architectures <Multi-Location Architectures>`  : A single PGD cluster with two or more groups in
  different data centers or availability zones.

- :ref:`Geo-Distributed Architectures <Geo-Distributed Architectures>`  : A single PGD cluster with two or more groups in
  different regions, like a multi-location architecture but with higher
  latency and potential network partitioning issues.

.. toctree::
  :maxdepth: 5

  how_to--expanded-how-to--architectures--always-on
  how_to--expanded-how-to--architectures--essential
  how_to--expanded-how-to--architectures--multi-location
  how_to--expanded-how-to--architectures--geo-distributed