Database Disaster Recovery Checklist
Purpose: To provide a comprehensive checklist for preparing for, responding to, and recovering from a database disaster, ensuring clear roles and responsibilities.
Key Roles & Responsibilities:
- Ops (Operations): Day-to-day monitoring, incident management, initial response, internal communication, runbook execution, system-level fixes.
- Infra (Infrastructure): Underlying hardware, networking, virtualization, storage, cloud provider interaction, foundational services.
- DBA (Database Administrator): Database configuration, tuning, backup/restore, replication, data integrity, database-level issue resolution.
- Biz (Business/Management): Defines RPO/RTO, business impact assessment, external/customer communication strategy, incident command.
- Dev (Development): Application-level DR testing, code changes for new database endpoints, application-specific data validation.
- Security: Data encryption, access control, compliance adherence during DR.
I. PRE-DISASTER / PREPARATION PHASE
(Goal: Minimize impact, ensure readiness)
| Checklist Item | Description / Details | Primary (P) | Secondary (S) | Status/Notes |
|---|---|---|---|---|
| A. Core Database DR Strategy | ||||
| 1. Define RPO (Recovery Point Objective) & RTO (Recovery Time Objective) for critical databases. | Quantify acceptable data loss (RPO) and downtime (RTO) for each database. | Biz | DBA, Ops | |
| 2. Design DR Architecture (Active-Passive, Active-Active, etc.) | Based on RPO/RTO, design the DR site infrastructure and database replication strategy (e.g., synchronous, asynchronous, log shipping, replication groups, multi-region failover). | DBA, Infra | Ops, Dev | |
| 3. Establish DR Site / Cloud Region | Provision and configure necessary infrastructure (compute, storage, network) at the DR site or secondary cloud region. Ensure network connectivity and security. | Infra | Ops | |
| 4. Document DR Plan | Comprehensive document detailing roles, responsibilities, step-by-step procedures, communication protocols, and escalation paths for a disaster scenario. Keep it accessible offline. | DBA, Ops | Infra, Biz, Dev, Security | |
| B. Backup & Restore | ||||
| 1. Implement Backup Strategy | Define backup types (full, incremental, differential), frequency, retention policies, and data encryption for backups. Ensure integrity checks. | DBA | Ops, Security | |
| 2. Secure Offsite/Immutable Backup Storage | Store backups in a separate, geographically diverse, and ideally immutable location (e.g., S3 bucket with versioning/object lock, tape library). | Infra | DBA | |
| 3. Regular Restore Testing | Crucial: Periodically (e.g., quarterly) perform full database restores to a non-production environment from backups. Validate data integrity and application connectivity. Document successful restores. | DBA, Ops | Dev | |
| C. High Availability & Replication | ||||
| 1. Configure Database Replication/HA | Set up and verify database replication (e.g., AlwaysOn Availability Groups, PostgreSQL Streaming Replication, MySQL Group Replication) or clustering solutions (e.g., Oracle RAC) between primary and DR sites. | DBA | Infra | |
| 2. Monitor Replication Status | Implement monitoring and alerting for replication lag, synchronization status, and errors. | Ops, DBA | ||
| 3. Conduct Failover Testing | Crucial: Regularly (e.g., semi-annually) simulate a primary site failure and perform a full failover to the DR site. Test application connectivity and performance post-failover. | DBA, Ops | Infra, Dev | |
| D. Monitoring & Alerting | ||||
| 1. Implement Comprehensive Monitoring | Monitor key database metrics (CPU, memory, disk I/O, network, connections, query performance, error logs) and replication health. | Ops, DBA | ||
| 2. Configure DR-Specific Alerts | Set up immediate alerts for critical events such as primary database unavailability, high replication lag, disk full conditions, or DR site connectivity issues. | Ops, DBA | ||
| E. Documentation & Runbooks | ||||
| 1. Create/Update DR Runbooks | Detailed, step-by-step guides for failover, failback, specific recovery procedures (e.g., point-in-time recovery), and common troubleshooting scenarios. | DBA, Ops | Infra | |
| 2. Develop Communication Plan | Define internal and external communication protocols, key stakeholders, pre-approved messaging templates, and channels (email, SMS, status page). | Biz, Ops | ||
| 3. Maintain Contact Lists | Up-to-date emergency contact lists for internal teams, critical vendors, and hosting/cloud providers. | Ops, Infra | Biz | |
| F. Team Training & Drills | ||||
| 1. Conduct Regular DR Drills / Tabletop Exercises | Practice the DR plan regularly with all relevant teams (Ops, Infra, DBA, Dev, Biz). Identify gaps and areas for improvement. | Ops, Biz | All Teams | |
| 2. Cross-Train Team Members | Ensure multiple team members are proficient in DR procedures and can perform critical tasks. | Ops, DBA | Infra, Dev | |
| G. External Communication Pre-Planning | ||||
| 1. Prepare Customer Communication Templates | Draft pre-approved templates for various stages of a disaster (incident detected, recovery in progress, service restored, post-mortem). | Biz | Ops | |
| 2. Establish Hosting Provider Communication Channels | Confirm emergency contact numbers, support portals, and escalation paths with your hosting or cloud provider. Understand their SLAs for disaster response. | Infra | Ops |
II. DURING DISASTER / INCIDENT RESPONSE PHASE
(Goal: Swiftly detect, mitigate, and recover services)
| Checklist Item | Description / Details | Primary (P) | Secondary (S) | Status/Notes |
|---|---|---|---|---|
| A. Detection & Initial Assessment | ||||
| 1. Detect Database Incident | Automatic alerts triggered by monitoring systems (Ops). Manual detection by Ops/DBA. | Ops, DBA | ||
| 2. Verify Incident & Assess Impact | Confirm the outage/issue. Determine the scope of impact (single database, multiple, entire system). Assess potential data loss (RPO deviation) and estimated downtime (RTO impact). | Ops, DBA | Biz | |
| 3. Declare Disaster Incident | Based on severity and impact, the Incident Commander (usually from Biz or senior Ops) formally declares a disaster and initiates the DR plan. | Biz | Ops | |
| B. Activation & Communication | ||||
| 1. Activate DR Plan & Assemble Team | Engage key personnel (Ops, Infra, DBA, Biz, Dev) as per the contact list. Set up a dedicated communication channel (e.g., conference bridge, chat room). | Ops, Biz | All Teams | |
| 2. Initial Internal Notification | Inform relevant internal stakeholders (execs, sales, support) about the incident and DR activation. | Ops | Biz | |
| 3. Initial Customer Notification (if applicable) | Using pre-approved templates, inform affected customers about the incident and the ongoing recovery efforts via status page, email, or other agreed channels. Shared Responsibility: Biz provides messaging, Ops handles distribution. | Biz | Ops | |
| 4. Communicate with Hosting/Cloud Provider | Contact the provider via emergency channels. Provide details of the incident. Inquire about their platform status and assistance for underlying infrastructure issues impacting your database. Shared Responsibility: Infra takes lead, Ops provides context. | Infra | Ops | |
| C. Database Recovery Execution | ||||
| 1. Analyze Primary DB Failure / Root Cause Identification | DBA and Ops diagnose the exact cause of the database failure (e.g., hardware failure, software bug, data corruption, network partition). Shared Responsibility: Ops for system-level, DBA for database-level, Infra for underlying components. | DBA, Ops, Infra | ||
| 2. Decide Failover / Restore Strategy | Based on RPO/RTO, data loss, and primary cause, decide whether to failover to the replica or perform a full restore from backup. | DBA, Ops | Biz | |
| 3. Execute Database Failover / Restore | Follow the documented runbook: Initiate failover to DR site / Begin database restore from latest valid backup to DR environment. | DBA, Ops | Infra | |
| 4. Verify Database Consistency & Availability | After failover/restore, DBA performs integrity checks, ensures all data files are consistent, and verifies the database is fully online and accessible. | DBA | Ops | |
| 5. Update Application Connectivity | Reconfigure applications to point to the new DR database endpoint (e.g., update DNS, connection strings). | Dev, Ops | ||
| 6. Validate Application Functionality | Dev team performs end-to-end testing of critical application flows with the DR database. | Dev | Ops | |
| 7. Fix Identified Issues (Workaround/Resolution) | During recovery, if underlying issues are found (e.g., bad config, broken script, corrupt data), apply temporary workarounds or permanent fixes to stabilize the system. Shared Responsibility: Ops/DBA for database/system level, Infra for infrastructure, Dev for application code. | Ops, DBA, Infra, Dev | ||
| 8. Data Synchronization (if applicable) | If a failback is planned or partial data loss occurred, initiate processes to synchronize data from the DR site back to the original primary (once restored) or capture/apply missing transactions. | DBA | ||
| 9. Provide Regular Status Updates | Maintain a steady stream of internal and external updates as per the communication plan. Shared Responsibility: Biz for external messaging, Ops for internal and distribution. | Biz, Ops |
III. POST-DISASTER / RECOVERY & REVIEW PHASE
(Goal: Restore full normalcy, learn, and improve)
| Checklist Item | Description / Details | Primary (P) | Secondary (S) | Status/Notes |
|---|---|---|---|---|
| A. Restoration & Stabilization | ||||
| 1. Restore Primary Site Infrastructure | Repair or replace failed hardware/software at the original primary site. Ensure it is fully operational and healthy. | Infra | Ops | |
| 2. Decide & Execute Failback (if applicable) | If the DR site is temporary, plan and execute the failback to the restored primary site. This often involves replicating data from DR to primary, then a controlled switchover. | DBA, Ops | Infra | |
| 3. Validate Data Integrity Post-Failback | Verify data consistency and integrity after failback to the primary site. | DBA, Ops | ||
| 4. Ensure Redundancy Restored | Confirm that all high availability and replication mechanisms are fully re-established and healthy on the primary site and between primary and DR. | DBA, Ops, Infra | ||
| B. Communication & Follow-up | ||||
| 1. Final Customer Communication | Send a final notification to customers confirming full service restoration and, if appropriate, a brief summary of lessons learned or preventative measures taken. Shared Responsibility: Biz provides messaging, Ops handles distribution. | Biz | Ops | |
| 2. Close Incident with Hosting/Cloud Provider | Confirm resolution with the provider and close any open support tickets. Document their involvement and response time. Shared Responsibility: Infra leads, Ops confirms. | Infra | Ops | |
| C. Post-Mortem & Improvement | ||||
| 1. Conduct Post-Mortem / Incident Review | Hold a blameless post-mortem meeting with all involved teams. Focus on what happened, why it happened, what went well, and what could be improved. | Biz, Ops | All Teams | |
| 2. Perform Root Cause Analysis (RCA) | Deep dive into the underlying causes of the disaster and any issues encountered during recovery. | Ops, DBA, Infra, Dev | ||
| 3. Document Lessons Learned | Summarize findings from the post-mortem, including identified weaknesses in the DR plan, tools, or team preparedness. | All Teams | ||
| 4. Create & Assign Action Items for Improvement | Based on lessons learned, create concrete, actionable tasks (e.g., update runbooks, improve monitoring, patch systems, conduct more training) with assigned owners and deadlines. | Ops | DBA, Infra, Dev, Security, Biz | |
| 5. Update DR Plan & Runbooks | Incorporate all improvements and new knowledge into the formal DR plan and associated runbooks. Ensure documentation reflects the current state of infrastructure and procedures. | Ops, DBA | Infra, Dev, Security | |
| 6. Schedule Next DR Drill | Based on the post-mortem, plan the next DR drill to test implemented improvements and reinforce team readiness. | Ops | Biz |
This checklist is a living document and should be reviewed and updated regularly to reflect changes in your infrastructure, applications, and business requirements.