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Zorluk: OrtaBusiness Continuity and Disaster Recovery

An organization is updating its disaster recovery plan for a mission-critical e-commerce application. The business continuity policy mandates a Recovery Time Objective (RTO) of less than 15 minutes and a Recovery Point Objective (RPO) of near zero (under 1 minute). Which TWO of the following deployment and recovery strategies will meet both requirements?

  1. Implement synchronous database replication across geographically redundant active-active data centers.Cevap
  2. Deploy automated global server load balancing (GSLB) with short DNS TTLs for rapid traffic redirection upon primary site failure.Cevap
  3. C
    Schedule nightly full backups combined with hourly incremental file backups copied to a secondary cold site.
  4. D
    Configure asynchronous batch database snapshots transferred to a warm site every 2 hours.
  5. E
    Maintain a warm site pre-configured with network infrastructure while restoring the latest differential backup upon disaster declaration.

Cevap

The strategy requires synchronous database replication across active-active data centers to guarantee an RPO of under 1 minute, paired with automated global server load balancing (GSLB) and short DNS TTLs to achieve an RTO of under 15 minutes.
Synchronous replication commits writes across sites simultaneously to achieve near-zero data loss (meeting the 1-minute RPO requirement). Automated GSLB with low TTLs swiftly shifts network traffic to the functional location without manual baseline server setup (meeting the 15-minute RTO requirement).

Adım Adım Çözüm

1
Analyze RPO requirements
Near-zero RPO (< 1 minute) requires continuous real-time data synchronization rather than periodic backup intervals or asynchronous snapshots.
Any batch backup or asynchronous process with intervals greater than 1 minute exposes the organization to unacceptable data loss.
2
Analyze RTO requirements
Near-instant RTO (< 15 minutes) requires pre-provisioned active infrastructure (hot site or active-active) and automated network failover.
Cold or warm site recovery strategies rely on manual server provisioning or backup restoration steps that consume more than 15 minutes.
3
Select matching technologies
Synchronous database replication satisfies the RPO constraint, while GSLB with short DNS TTLs satisfies the RTO constraint.
Together, these solutions deliver continuous uptime capability and immediate disaster failover.

Anahtar Kavram

Disaster Recovery Site Selection, RTO, and RPO Alignment
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Konular

Business Continuity and Disaster Recovery

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