Once the planning phase of disaster recovery is complete, the next step is the actual implementation. This involves setting up the necessary infrastructure, ensuring data integrity through backups and replication, and establishing procedures for system transitions during disruptions.
Setting up DR Infrastructure:
- Dedicated DR Site: Decide on the type of DR site best suited for your needs:
- Hot SiteA fully redundant data center with all necessary systems, ready to take over immediately. This option is expensive but offers the quickest RTO.
- Warm SitePartially equipped with infrastructure and backups. There might be a delay in restoring services compared to a hot site, but it’s more affordable.
- Cold SiteA backup facility with power and cooling but no equipment. In case of a disaster, systems are set up using stored backups. This option is the most economical but has the longest RTO.
- Network Infrastructure: Ensure that the DR site can be quickly integrated into the organizational network. This could involve setting up dedicated network lines, VPN configurations, or redundant internet connections.
- Physical and Environmental Controls: Ensure the DR site has necessary physical security measures, cooling systems, power backups, and fire suppression systems.
Data Backup and Replication:
- Backup Frequency: Based on your RPO, determine how frequently backups should be taken. Options range from daily backups to continuous, real-time replication.
- Backup Storage: Decide where backups will be stored. This could be on-site, at a dedicated DR site, or in the cloud.
- Replication Methods:
- Synchronous Replication: Data is replicated in real-time. Any change in the primary site is instantly mirrored to the DR site.
- Asynchronous Replication: Data is replicated with a slight delay, which can vary from a few seconds to several minutes.
Failover and Failback Processes:
- Failover Process:
- Automatic Failover: Systems are configured to automatically switch to the DR site without manual intervention once a disruption is detected.
- Manual Failover: A deliberate decision is made to switch operations to the DR site, requiring manual procedures.
- Once the primary site is restored and stable, operations must transition back. This process involves:
- Checking data integrity and ensuring that any data updated at the DR site is synchronized with the primary site.
- Gradually rerouting user traffic and services from the DR site back to the primary site.
- Monitoring systems closely during the transition to detect and address any issues.
In conclusion, implementing disaster recovery solutions is a meticulous process that requires attention to both technical and operational details. Properly set-up DR infrastructure, combined with robust data management and clear failover/failback processes, ensures that an organization is well-equipped to handle disruptions and swiftly restore operations.
Key terms in plain language
Open a term for a concise explanation of language used on this page.
VPN
A virtual private network creates an encrypted connection across another network, commonly allowing remote users or offices to access private resources securely.
Disaster Recovery (DRaaS)
A plan and service for restoring applications, data, and operations after an outage or disruption. DRaaS provides recovery infrastructure through a managed cloud service.
Cloud Computing
Computing resources—such as applications, servers, storage, or databases—delivered from remote infrastructure and scaled as requirements change.
Infrastructure as a Service (IaaS)
Cloud-based servers, storage, and networking that customers configure and manage without owning the underlying data-center hardware.
Software as a Service (SaaS)
Software accessed as an online service instead of being installed and maintained entirely on the customer’s own computers or servers.
Identity and Access Management (IAM)
The systems and policies that determine who a user is, what resources they may access, and how that access is authenticated and reviewed.