Postgres Cloud Manager

Gülçin Yıldırım Jelínek

select * from me;

Board of Directors @ PostgreSQL Europe

Cloud Services Manager @ 2ndQuadrant

Main Organizer @ Prague PostgreSQL Meetup

Member @ Postgres Women 

MSc, Computer & Systems Eng. @ TalTech

BSc, Applied Mathematics @ Yildiz Technical University

Writes on 2ndQuadrant blog

From Turkey

Lives in Prague


  • What is Multi-Master?

  • Physical vs Logical Replication

  • Postgres-BDR 

  • Multi-Master Architectures

  • Multi-Master Postgres in Cloud (GDS)

  • Our Experience with Cloud Postgres

  • Conclusion

  • Questions

What is Multi-Master?

  • Replicate writes between multiple masters

    • Asynchronous with conflicts

    • Conflict-free (consensus)

Physical vs Logical Replication

  • Replay WAL
    • WAL cannot be changed
  • Bit copy of upstream
    • All or nothing
    • Same major version
  • Can't write to downstream
  • Logical decoding 
    • Extension API
    • Row changes
    • Committed changes
  • Selective replication
  • Cross-version
  • Can write to all nodes

Physical vs Logical Replication


  • Multi-master

  • Asynchronous

  • Eventually consistent

    • Does not prevent concurrent writes

    • Optimistic conflict detection (after commit)

    • Automatic conflict resolution

  • Used for Logical Replication development in PG

Multi-Master Architectures - I

Geographically distributed cluster

AlwaysOn Architecture


Connection Router




Multi-Master Architectures - II

Global Database as a Service

Bundled up best PostgreSQL practices into our cloud service, with high-availability, and 24x7 support by the best PostgreSQL engineers!


  • We develop
  • We host
  • We manage
  • We support
  • YOU USE!

GDS Flavours


Single Master

  • Development
    • 1 primary database
    • No support
  • Test
    • 1 primary database
    • 1 replica database
    • Gold Support
  • Production
    • 1 primary database
    • 2 replica databases
    • Backups
    • Platinum Support

Multi Master

  • Bi-Directional Replication with Postgres-BDR 3.0
  • High availability
  • Geographically distributed cluster
  • Zero Downtime Upgrades
    • Different Postgres versions
  • Flexibility
    • Different configuration
    • Different instance sizes (CPU, disk, memory etc)

Always On

  • Provides at least 4 Nines (99.99%) availability
  • Deployed in single region with two different availability zones:
    • 2 BDR primary
    • 2 physical replica
    • Backup
  • “Very High Availability” described in the BDR whitepaper.

How to Connect to your DB?

Database Configuration

Monitoring Dashboard

Dynamic Scaling

Scaling Down





SSL connections only

Encrypted Data at Rest


VPC Peering

IP Whitelisting

Authenticate with 2ndQuadrant SSO


Docs (WiP)

Interactive API docs

Postgres Cloud Manager


  • Postgres in Cloud is a go!

  • Multi-Master adds
    new possibilities

  • It's possible to create
    your own cloud independent of
    the platform

  • Automation enables
    easy management

  • Postgres Support
    applies to Cloud!



Postgres Cloud Manager

By Gülçin Yıldırım Jelínek

Postgres Cloud Manager

This presentation is prepared for PGM demonstration.

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