Simple on the surface. Engineered underneath.
Reference architectures our solution architects use as starting points for critical applications. Explore the layers, or break something and watch it recover.
These are vendor-neutral starting points, not a client's environment. Every design is tailored, and if a simpler one does the job, we'll say so.
Multi-cloud, always on
A revenue-critical platform built to survive a zone failure, a region failure and a cloud-provider outage.
Swipe sideways to see the whole diagram.
How much resilience do you need?
More isn't always better. Each step up adds cost and complexity, and most applications don't need the last row. We'll tell you which one fits.
| Pattern | Survives | Typical recovery targets | Relative cost | Fits when |
|---|---|---|---|---|
| Single region, multiple zones | A zone failure | Region loss means restoring from backup, typically hours | $ | Internal and non-critical apps |
| Two regions, active-passive | Zone and region failures | Recovery under an hour; under 15 minutes of data at risk | $$ | Most business-critical apps |
| Two regions, active-active | Zone and region failures, with no planned downtime | Recovery under 15 minutes; under 5 minutes of data at risk | $$$ | Revenue-critical, customer-facing apps |
| Add a second cloud on warm standby | All of the above, plus a cloud-provider outage | Recovery in 1 to 2 hours from a provider outage | $$$$ | Regulated services that must never go fully dark |
Typical design targets. Real numbers depend on the application, data volumes and how often recovery is tested.
More reference designs
The same discipline applied to ERP, security and networks.
SAP S/4HANA with high availability and DR
For ERP that can't stop at month-end close.
- SAP HANA system replication, synchronous across zones in the primary region
- Clustered SAP central services (ASCS and ERS), so one server failure doesn't stop SAP
- Asynchronous replication to a second region for disaster recovery
- Immutable backups and a recovery runbook tested twice a year
Survives: a server or zone failure with near-zero data loss, and a region failure with recovery proven in DR tests.
Zero Trust access for a hybrid workforce
For people working anywhere, on any device, without a VPN bottleneck.
- Phishing-resistant MFA and conditional access
- Device compliance checks before any app opens
- SASE with zero-trust network access replacing the VPN
- EDR and identity threat detection feeding a SIEM with a 24/7 SOC
- Least-privilege, just-in-time admin access
Survives: a stolen password, a lost laptop or a compromised account, without letting an attacker move sideways.
Multi-site network with cloud on-ramps
For dozens of sites that all depend on cloud apps and voice.
- Dual-carrier SD-WAN at every site: fiber plus 5G backup
- A security service edge so every site gets the same protection
- Private connections into AWS, Azure and Google Cloud
- One monitoring view across carriers, with an OLA per carrier
Survives: a carrier outage or a cut fiber line, with the cause traced to the right carrier.
Want your design pressure-tested?
Bring your current architecture to a free discovery call. We'll tell you where it's strong and where it would break. General inquiries: info@netvarista.com