multi-master postgresql architectures in cloud · agenda what is multi-master? physical vs logical...

Multi-MasterMulti-MasterPostgreSQLPostgreSQLArchitecturesArchitecturesin Cloudin CloudGülçin Yıldırım JelínekGülçin Yıldırım Jelínek 1

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AgendaAgendaWhat is Multi-Master?What is Multi-Master?Physical vs Logical ReplicationPhysical vs Logical ReplicationPostgres-BDR Postgres-BDR Multi-Master ArchitecturesMulti-Master ArchitecturesMulti-Master Postgres in Cloud (GDS)Multi-Master Postgres in Cloud (GDS)Our Experience with Cloud PostgresOur Experience with Cloud PostgresConclusionConclusionQuestionsQuestions

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What is Multi-Master?What is Multi-Master?

Replicate writes between multiple mastersReplicate writes between multiple mastersAsynchronous with conflictsAsynchronous with conflictsConflict-free (consensus)Conflict-free (consensus)

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Physical vs Logical ReplicationPhysical vs Logical Replication

Replay WALWAL cannot be changed

Bit copy of upstreamAll or nothingSame major version

Can't write to downstream

Logical decoding Extension APIRow changesCommitted changes

Selective replicationCross-versionCan write to all nodes

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Physical vs Logical ReplicationPhysical vs Logical Replication

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Postgres-BDRPostgres-BDR

Multi-masterMulti-masterAsynchronousAsynchronousEventually consistentEventually consistent

Does not prevent concurrent writesDoes not prevent concurrent writesOptimistic conflict detection (after commit)Optimistic conflict detection (after commit)Automatic conflict resolutionAutomatic conflict resolution

Used for Logical Replication development in PGUsed for Logical Replication development in PG

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Multi-Master Architectures - IMulti-Master Architectures - I

Geographically distributed clusterGeographically distributed cluster8

AlwaysOn ArchitectureAlwaysOn Architecture

Multi-Master Architectures - IIMulti-Master Architectures - II

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Application

ConnectionRouter

M-Lead


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Application

ConnectionRouter

Postgres-BDR

M-Lead M-Shadow


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Global Database as a ServiceGlobal Database as a Service

Bundled up best PostgreSQLpractices into our cloudservice, with high-availability,and 24x7 support by the bestPostgreSQL engineers!

We developWe hostWe manageWe supportYOU USE!

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GDS FlavoursGDS Flavours

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Single MasterSingle Master

Development1 primary databaseNo support

Test1 primary database1 replica databaseGold Support

Production1 primary database2 replica databasesBackupsPlatinum Support

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Multi MasterMulti Master

Bi-Directional Replication withPostgres-BDR 3.0High availabilityGeographically distributed clusterZero Downtime Upgrades

Different Postgres versionsFlexibility

Different configurationDifferent instance sizes (CPU,disk, memory etc)

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physical rep.

bi-directional replication

subcluster a subcluster b

geo cluster

Multi Master ArchitectureMulti Master Architecture

physical rep.

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AlwaysOnAlwaysOnProvides at least 4 Nines (99.99%)availabilityDeployed in single region with twodifferent availability zones:

2 BDR primary2 physical replicaBackup

“Very High Availability” described inthe BDR whitepaper.

15


M-Lead M-Shadow

bi-directional replication

physical rep.

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How to Connect to your DB?How to Connect to your DB?

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How to Connect to your DB?How to Connect to your DB?

1. Set your database password first2. Choose the instance you want to connect3. Choose one of the provided connection string types4. Connect with your db client

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Database ConfigurationDatabase Configuration

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Database ConfigurationDatabase Configuration

Search parameter name

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Monitoring DashboardMonitoring Dashboard

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Dynamic ScalingDynamic Scaling

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LoggingLogging

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LoggingLogging

Action log of all clusters

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LoggingLogging

Action log of all clusters

Filter by cluster name

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BenchmarksBenchmarks

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TPS

22


TPS

Latency

22

SecuritySecurity

SSL connections only

Encrypted Data at Rest

No SUPERUSER

VPC Peering

IP Whitelisting

Authenticate with 2ndQuadrant SSO

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Automated BackupsAutomated Backups

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Automated BackupsAutomated Backups

Filter backups by status and cluster 24

Scheduled BackupsScheduled Backups

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Backup schedule

25


Backup retentionBackup schedule

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Point-in-Time RecoveryPoint-in-Time Recovery

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Point-in-Time RecoveryPoint-in-Time Recovery

Pick time26

DocumentationDocumentation

27


Docs (WiP)

27


Docs (WiP)

Interactive API docs

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Postgres Cloud ManagerPostgres Cloud Manager

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ConclusionConclusionPostgres in Cloud is a go!Postgres in Cloud is a go!Multi-Master addsMulti-Master adds new possibilitiesnew possibilitiesIt's possible to createIt's possible to create your own cloudyour own cloudindependent ofindependent of the platformthe platformAutomation enablesAutomation enables easy managementeasy managementPostgres SupportPostgres Support applies to Cloud!applies to Cloud!

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Questions?Questions?

Tešekkürler!Tešekkürler!

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multi-master postgresql architectures in cloud · agenda what is multi-master? physical vs logical...

Documents