Disaster recovery strategies in GCP - Step-by-Step Execution

Process Flow - Disaster recovery strategies

Disaster Occurs

↓

Detect Disaster

↓

Activate Recovery Plan

↓

Switch to Backup Site

↓

Restore Data & Services

↓

Verify System Health

↓

Resume Normal Operations

This flow shows the steps taken when a disaster happens, from detection to recovery and resuming normal service.

Execution Sample

GCP

1. Detect disaster event
2. Activate recovery plan
3. Switch traffic to backup
4. Restore data from backup
5. Verify system health
6. Resume operations

This sequence outlines the key actions in a disaster recovery process on GCP.

Process Table

Step	Action	Condition/Check	Result/Next Step
1	Detect disaster event	Disaster detected?	Yes -> Activate recovery plan
2	Activate recovery plan	Plan available?	Yes -> Switch traffic to backup
3	Switch traffic to backup	Backup site ready?	Yes -> Restore data from backup
4	Restore data from backup	Data restored?	Yes -> Verify system health
5	Verify system health	Systems healthy?	Yes -> Resume operations
6	Resume operations	Operations resumed	Disaster recovery complete
7	If any check fails	No	Repeat previous step or alert team

💡 Disaster recovery completes when operations resume successfully or manual intervention occurs if checks fail.

Status Tracker

Variable	Start	After Step 1	After Step 2	After Step 3	After Step 4	After Step 5	Final
DisasterDetected	False	True	True	True	True	True	True
RecoveryPlanActivated	False	False	True	True	True	True	True
TrafficSwitched	False	False	False	True	True	True	True
DataRestored	False	False	False	False	True	True	True
SystemHealthy	False	False	False	False	False	True	True
OperationsResumed	False	False	False	False	False	False	True

Key Moments - 3 Insights

Why do we check if the backup site is ready before switching traffic?

Because switching traffic to a backup site that is not ready can cause service outages. See execution_table step 3 where the condition 'Backup site ready?' must be Yes to proceed.

What happens if data restoration fails?

The process does not move forward. According to execution_table step 4, if 'Data restored?' is No, the system repeats the step or alerts the team to fix the issue.

Why verify system health after restoring data?

Verifying system health ensures all services work correctly before resuming operations. This is shown in execution_table step 5 where 'Systems healthy?' must be Yes to continue.

Visual Quiz - 3 Questions

Look at the execution_table, at which step is traffic switched to the backup site?

A Step 2

B Step 4

C Step 3

D Step 5

💡 Hint

Check the 'Action' column for 'Switch traffic to backup' in the execution_table.

According to variable_tracker, what is the value of DataRestored after Step 4?

A True

B False

C Undefined

D Null

💡 Hint

Look at the 'DataRestored' row under 'After Step 4' in variable_tracker.

If the system health check fails at Step 5, what does the execution_table say happens next?

A Resume operations anyway

B Repeat previous step or alert team

C Skip to Step 6

D Ignore and continue

💡 Hint

Refer to the last row in execution_table about what happens if any check fails.

Concept Snapshot

Disaster recovery strategies in GCP:
- Detect disaster quickly
- Activate recovery plan
- Switch traffic to backup site only if ready
- Restore data from backups
- Verify system health before resuming
- Repeat or alert if any step fails
This ensures minimal downtime and data loss.

Full Transcript

Disaster recovery strategies involve detecting a disaster, activating a recovery plan, switching traffic to a backup site, restoring data, verifying system health, and resuming normal operations. Each step requires checks to ensure readiness before moving forward. If any check fails, the process repeats or alerts the team to prevent further issues. This approach helps keep services running with minimal interruption during disasters.