Solutions · 05
High Availability & Disaster Recovery
For systems with low tolerance for downtime, we design, build and regularly test high-availability and disaster-recovery architectures around your business targets.
01Problems we solve
What organisations most often face in this area.
- P.01
Undefined targets
How much data loss and downtime is acceptable (RPO/RTO) has never been agreed with the business.
- P.02
Built but never rehearsed
The architecture exists, but failover and failback have never been tried and the procedure is not written.
- P.03
Missed dependencies
Logins, jobs, connection strings and application settings are missing on the secondary.
- P.04
Synchronisation lag
Replica or log shipping lag is not monitored; an incident could lose more data than expected.
02Reference architecture
Two sites, defined failover, rehearsed failback.
The architecture chosen for your targets is built together with documented runbooks. The drawing shows a typical design; each organisation's version follows its RPO/RTO targets.
Illustrative example — not real client data
Primary data centre
Windows Server Failover Cluster
Disaster recovery site
PostgreSQL equivalent
DR test flow
- 01Preparation and communication
- 02Planned failover
- 03Application validation
- 04Failback
- 05Record of actual RPO/RTO
03Our approach
How we work.
01
Set targets
Systems are classified by criticality; RPO and RTO targets are agreed with the business for each.
02
Architecture design
The right technology is chosen for the targets: Always On, Windows Server Failover Cluster, log shipping or replication.
03
Build and runbook
The architecture is built; failover, failback and validation steps become executable procedures.
04
Regular DR tests
Disaster scenarios are rehearsed on schedule; actual times are compared with targets.
04Technical scope
Engineering depth.
High availability
- Always On Availability Groups
- Windows Server Failover Cluster
- Failover Cluster Instances
- PostgreSQL streaming replication and automatic failover
Disaster recovery
- Log shipping
- Replication
- Remote site architecture
- Restore-based recovery strategy
Verification
- RPO / RTO assessment
- DR plan and runbook
- Scheduled DR tests
- Synchronisation lag monitoring
05Value to the organisation
What changes for management.
Proven continuity
Disaster recovery is a rehearsed, timed capability, not a document.
Known risk
Management knows how long each system takes to return and how much data it could lose.
Audit readiness
Test records and procedures are ready for continuity requirements.
Related solutions
Let's review your environment together.
Let's clarify the current state with a discovery call or a health assessment and set priorities together.