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U.S. Federal Civilian Agency
The agency operated more than 200 Oracle databases across multiple data centers, many running on aging hardware with escalating maintenance costs and mounting compliance gaps. Performance degradation during peak reporting periods was impacting mission-critical operations, and the existing disaster recovery posture failed to meet updated federal continuity-of-operations requirements.
Additionally, the agency faced a looming data center consolidation mandate under the Federal Data Center Optimization Initiative (FDCOI). With limited internal cloud expertise and a complex web of interdependencies between databases, middleware, and custom applications, the agency needed a partner capable of executing a large-scale migration without disrupting ongoing operations.
Stakeholder alignment was another hurdle. Multiple program offices relied on different database instances, each with unique SLAs, compliance requirements, and change management processes that had to be respected throughout the migration.
Tharseo IT deployed a dedicated migration team of Oracle-certified engineers who executed a comprehensive four-phase approach. During the Discovery phase, we performed automated dependency mapping across all 200+ databases, cataloging interconnections with middleware layers, custom applications, and reporting systems to build a complete migration blueprint.
In the Planning phase, we designed a target-state OCI architecture aligned with FedRAMP High requirements, leveraging Oracle Exadata Cloud Service for high-performance workloads and Oracle Autonomous Database for lower-complexity instances. Each database was assigned to a migration wave based on risk profile, dependency chains, and business criticality.
During Execution, we utilized Oracle Zero Downtime Migration and Oracle Data Guard to perform live migrations with continuous data replication, ensuring zero downtime for every cutover. Automated validation scripts verified data integrity, application connectivity, and performance baselines after each wave. The final Optimization phase included right-sizing every instance, implementing automated scaling policies, and configuring Oracle Cloud Guard for continuous security monitoring.
The migration was completed within the six-month timeline, on budget, with zero unplanned downtime across all 200+ databases. The agency realized a 40% reduction in total infrastructure costs in the first year, driven by right-sized compute, elimination of legacy hardware maintenance, and Oracle's government pricing.
Database query performance improved by an average of 55% on OCI, with mission-critical reporting workloads seeing up to 3x faster execution times. The new environment achieved FedRAMP High authorization within 60 days of migration completion, and automated disaster recovery reduced the agency's RTO from 24 hours to under 2 hours.
The success of this engagement led the agency to expand its partnership with Tharseo IT into a multi-year managed services agreement covering 24/7 monitoring, patching, and continuous optimization of the OCI environment.
200+ Oracle databases across 3 data centers, 50TB+ total data, 15,000+ concurrent users
Automated dependency mapping across all 200+ databases, compliance gap analysis, performance baselining
Target-state OCI architecture design aligned with FedRAMP High, Exadata Cloud Service and Autonomous DB selection
Migration of 20 non-critical databases to validate tooling, runbooks, and rollback procedures
Migration of 60 low-complexity databases using Oracle Zero Downtime Migration with Data Guard replication
Migration of 80 databases with middleware dependencies, including integration testing and performance validation
Migration of remaining 40+ high-criticality databases with 24/7 war-room support and instant rollback capability
On-premises Oracle RAC clusters across 3 aging data centers, manual DR with 24-hour RTO, siloed monitoring, no automated patching
OCI Exadata Cloud Service + Autonomous Database, Oracle Data Guard for real-time DR (2-hour RTO), Oracle Cloud Guard for continuous security monitoring, automated patching and scaling
45%
Infrastructure
Elimination of legacy hardware maintenance and data center costs
25%
Licensing
Oracle BYOL and government pricing optimization
20%
Operations
Automated patching, scaling, and monitoring reducing manual effort
10%
Compliance
Inherited FedRAMP controls reducing audit preparation overhead
“Tharseo IT delivered what our previous vendor said was impossible: migrating our entire Oracle database estate to the cloud without a single minute of downtime. Their team's depth of OCI expertise gave us confidence at every stage.”
Deputy CIO
U.S. Federal Civilian Agency