Choosing your deployment method
===============================

You can deploy and install EDB Postgres Distributed products using the
following methods:

-  :ref:`Installing Trusted Postgres Architect (TPA) <Installing Trusted Postgres Architect (TPA)>`  (TPA) is an orchestration tool that uses Ansible to
   build Postgres clusters using a set of reference architectures that
   document how to set up and operate Postgres in various scenarios. TPA
   represents the best practices followed by EDB, and its
   recommendations apply to quick testbed setups just as they do to
   production environments. TPA’s flexibility allows deployments to
   virtual machines, AWS cloud instances or Linux host hardware. See
   :ref:`Deploying with TPA <Deploying EDB Postgres Distributed using Trusted Postgres Architect>`  for more information.

-  BigAnimal is a fully managed database-as-a-service with built-in
   Oracle compatibility that runs in your cloud account or BigAnimal’s
   cloud account where it’s operated by our Postgres experts. EDB
   BigAnimal makes it easy to set up, manage, and scale your databases.
   The addition of distributed high-availability support powered by EDB
   Postgres Distributed (PGD) enables single- and and multi-region
   Always On Gold clusters. See :ref:`Distributed high availability <An Overview of Durability options>`  in the :ref:`BigAnimal documentation </biganimal/latest>`  for
   more information.

-  EDB Postgres Distributed for Kubernetes is a Kubernetes operator
   designed, developed, and supported by EDB. It covers the full
   lifecycle of highly available Postgres database clusters with a
   multi-master architecture, using PGD replication. It’s based on the
   open source CloudNativePG operator and provides additional value,
   such as compatibility with Oracle using EDB Postgres Advanced Server,
   Transparent Data Encryption (TDE) using EDB Postgres Extended or
   Advanced Server, and additional supported platforms including IBM
   Power and OpenShift. This offering is currently in preview.

.. csv-table::
  :header: "",<center>TPA</center>,<center>BigAnimal</center>,<center>Kubernetes<br/>(preview)</center>
  :widths: 15,12,12,20
  :align: left
  :class: longtable

  Single region,✅,✅,✅
  Active-Active support,2+ regions,2 regions,2 regions
  Write/Read routing,Local or global,Local,Local
  Automated failover,AZ or Region,AZ,AZ
  Major version upgrades,✅,Roadmap,Roadmap
  Subscriber-only nodes<br/> (read replicas),✅,TBD,TBD
  Logical standby nodes,✅,TBD,TBD
  PgBouncer,✅,TBD,TBD
  Selective data replication,✅,✅,✅
  Maintenance windows per region,✅,✅,✅
  Target availability,99.999% SLO,99.99 SLA (single)<br/>99.995% SLA (multi),99.999% SLO