Recovery time objective

As explained in PostgreSQL Mistakes and How to Avoid Them

A recovery time objective is the maximum acceptable duration of service unavailability after a disruptive failure.

Recovery time objective (RTO) is the maximum downtime acceptable before service is fully restored after a disaster. In PostgreSQL, RTO depends on the high-availability architecture, not merely on having backups. section 9.5

The backup-only recovery trap

A team may feel protected because backups and point-in-time recovery can recover committed data. If the server burns down, however, restoring the installation onto replacement hardware or a new cloud instance can cause significant downtime. A spare server or standby reduces that restoration delay; replication and failover architecture determine whether the result meets the RTO. section 9.5

Figure 9.3 A sample PostgreSQL HA setup with a cascaded replication for redundancy and backup

Use the cascaded-replication diagram to relate redundancy architecture to faster recovery and reduced service interruption. section 9.5

How PostgreSQL Mistakes and How to Avoid Them covers it

How deep it goes

Defines downtime tolerance and connects it to HA architecture, but stops short of prescribing a numerical target or recovery procedure.

Examples

Uses server fire, replacement infrastructure, backups, spare servers, and cascaded replication as recovery scenarios.

What you can do after

Evaluate whether backup-only recovery or redundant PostgreSQL infrastructure can meet an acceptable downtime limit.

How it connects

Connects RTO with RPO, PITR, WAL, backups, replication, warm standby, hot standby, and high availability.

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Also explained in

• 

  liveBookmanning.com
  100 SQL Server Mistakes and How to Avoid ThemRTO, or recovery time objective, is the maximum acceptable duration of service downtime after a disruption.
• 

  liveBookmanning.com
  Data-Driven CybersecurityA recovery time objective (RTO) is the maximum acceptable time needed to restore a system or service after disruption.

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Related concepts

• disaster recoverymeasures · Disaster recovery is the planning and execution of processes and capabilities for restoring systems, data, and services after a disruptive event.
• business impact analysisproduced by · Business impact analysis is a structured assessment of how disruptions affect organizational functions and objectives, including their recovery priorities.
• recoverymeasures · Recovery is the process of restoring access, data, computation, or system operation to an acceptable state after failure, loss, or disruption.

This explainer was generated by Manning's knowledge graph from the text of PostgreSQL Mistakes and How to Avoid Them. The section links point to the parts of the book it draws on.