Resilience & Disaster Recovery on AWS | Cloud Life Consulting

Downtime costs money for every hour it lasts, and anything written since your last good backup is gone. Most teams cannot say how many hours or how much data, because the recovery plan has never been run. Untested backups fail when you need them. A single-Region estate has no answer when that Region degrades, and an unrehearsed rollback turns a planned migration into an unplanned outage.

Cloud Life Consulting establishes your recovery targets with you, delivers the architecture to meet them, and proves it by running the failover and the restore.

PLAN

• Failure mode analysis -- Critical user stories decomposed into code, config, infrastructure, data stores and dependencies. Failure modes identified against the five AWS resilience categories, scored on likelihood and impact, then treated as avoid, mitigate, transfer or accept. • Recovery objectives and cost of downtime -- We model what an hour of downtime costs and what an hour of lost data costs, then work backwards to an RTO and RPO the business can defend. • Architecture review -- Single points of failure across compute, data and network. Multi-AZ posture for RDS, Aurora, ECS, EKS and load-balanced tiers. Hard and soft dependency mapping, and whether the workload survives an Availability Zone loss. AWS Resilience Hub scored against your targets. • Data retention policy -- How long backups are kept and how often they are taken, decided against the recovery objective and the cost of holding them.

ACTION

• Architecture changes -- Single points of failure removed. Multi-AZ conversion, redundancy added where a component has none, and rework so recovery needs no control plane call. • Disaster recovery and backup -- Backup and restore, pilot light, warm standby or multi-site active/active, selected against your RTO and RPO with recovery time and monthly cost side by side. Built with replication through AWS Elastic Disaster Recovery, S3 Cross-Region Replication, Aurora Global Database or DynamoDB global tables. Route 53 health checks and failover routing wired and tested. Backups deployed with immutable retention and point-in-time recovery. • Observability and alerting -- Leading indicators for a workload approaching failure, lagging indicators for impact as it lands. CloudWatch alarms, Synthetics canaries and the AWS Health Dashboard wired into your operations view. Gray failure detection for when a health check reports green and the workload has stopped. • Application changes -- Retries with idempotency, timeouts, circuit breakers and graceful degradation on the paths that need them. Emergency levers built. Deployment with automated rollback, rehearsed before a cutover window opens.

TEST

• Failover and restore testing -- Failover executed and timed against your target. Restore executed end to end, including one asset from the coldest storage tier, and the retention window tested against a propagated deletion. • Game day -- Scripted failure experiments through AWS Fault Injection Service from a library of fifty scenarios, run with your engineers against a non-production replica and then production. What the experiments break, we fix, and your team keeps the templates. • Load and latency testing -- Latency objectives at P50 and P99, rate limiting and load shedding, and Service Quotas headroom alarmed before a limit is reached.

HANDOFF

• Runbooks, readiness and cadence -- DR activation runbooks covering declare, test and fall back, written from the rehearsal. An Operational Readiness Review with a RACI, escalation path and SLI/SLO definitions. A drill cadence and recurring analysis review your team runs.

DELIVERABLES

• Agreed recovery targets and a ranked register of what can break, including the risks you have decided to accept and why. • A resilient architecture, built and running, with systems spread across multiple physical locations and a standby copy of critical workloads in another Region. • Protected data you can recover -- backups that cannot be deleted even by someone with a stolen administrator password, restored in front of you and timed. • Proof it works -- failure tests run against your systems with results recorded, and monitoring that catches a system slowing or quietly producing the wrong answer. • Runbooks and a drill schedule with enough dated evidence to answer an auditor, an insurer or a large customer.

Every change lands as infrastructure as code in your repository. Multi-Region is treated as a decision that must be justified -- each recovery pattern is priced against the recovery window the business will actually defend. Scoped to the AWS resilience analysis framework covering redundancy, sufficient capacity, timely output, correct output and fault isolation.