Services — Cloud Data Migration
Legacy Architecture Is a Risk. Modernisation Is a Strategy.
EXCO migrates legacy databases, data warehouses and reporting to AWS in planned phases, with automated reconciliation at every stage and business reporting running throughout.
- Data Migration
- Cloud Migration
- AWS
- Legacy Modernisation
- Data Reconciliation
- Zero-Downtime Cutover
The Problem
Legacy Platforms Compound in Cost and Risk.
Ageing on-premise databases and warehouses become expensive to maintain, hard to scale and increasingly out of step with modern reporting and analytics needs.
The cost of staying rises every year, but so does the fear of moving. EXCO removes that fear with a reconciled, phased approach.
Ageing infrastructure
Servers and licences reach end of life.
Failed past attempts
Previous migrations stalled because data didn't match.
Blocked capabilities
Legacy platforms can't support analytics or AI.
Knowledge in a few heads
Only two people understand how the old system works.
No target architecture
Nobody has defined what 'good' looks like.
Our Approach
Zero Data Loss. Minimal Downtime. Full Confidence.
- 01
Discovery & Assessment
Inventory tables, jobs, reports and dependencies.
- 2–4 weeks
- 02
Target Architecture
Design the AWS platform and migration waves.
- 2–3 weeks
- 03
Reconciliation Framework
Build automated reconciliation before moving data.
- Before migration
- 04
Phased Migration
Move data and workloads in waves, lower risk first.
- Wave-based
- 05
Parallel Run
Run old and new side by side until figures match.
- Equivalence
- 06
Cutover & Hypercare
Planned switchover with close monitoring after go-live.
- Post go-live
Reference architecture
Legacy Source
- On-premise SQL
- Legacy ETL
- Spreadsheets
- Source applications
Transition (Parallel Run)
- Automated reconciliation
- Equivalence validation
- Fallback plan
Target (AWS)
- Amazon S3
- Amazon RDS
- Amazon Redshift
- AWS Glue
What We Deliver
Migration and Modernisation. End to End.
The full migration lifecycle, from assessment to post-migration stabilisation.
Legacy Source Assessment
A complete inventory of source objects, logic and downstream dependencies.
- Table & job inventory
- Business logic extraction
- Dependency mapping
- Migration sequencing
Target Architecture Design
The right AWS services for your workloads, volumes and budget.
- Platform selection
- Layered data architecture
- Security design
- Cost estimate
Automated Reconciliation
Row counts, totals and business rules checked at every stage.
- Row-count reconciliation
- Aggregate checks
- Business-rule validation
- Equivalence testing
Parallel Run & Cutover
Old and new systems run together until results match.
- Parallel run plan
- Equivalence criteria
- Managed cutover
- Fallback capability
Pipeline & Report Re-Platforming
ETL jobs and reports rebuilt or repointed to the new platform.
- ETL conversion
- Report repointing
- Performance tuning
- User acceptance testing
Post-Migration Stabilisation
Hypercare, monitoring and handover to operations.
- Hypercare monitoring
- Performance benchmarking
- User support
- DataOps handover
Typical Engagements
Migrations With Zero Tolerance for Data Loss
Banking · Core Data
On-Premise Warehouse to AWS
Reporting warehouse migrated in waves with full reconciliation.
Goal: Zero data loss, no reporting disruption
Manufacturing · ERP Data
Legacy ERP Data Migration
Historical ERP data cleaned and migrated to a new system.
Goal: Clean history in the new system
Any sector · Reporting
Spreadsheet to Cloud Platform
Critical spreadsheet reporting moved onto an AWS data platform.
Goal: Automated, scalable reporting
Any sector · Cost
Licence Exit Migration
Expensive legacy database replaced with cost-efficient AWS services.
Goal: Lower total cost of ownership
FAQ
Common Questions
How long does a migration to AWS take?
A single database with its reports can take weeks. A full warehouse is migrated in phases over several months.
Related
Paired With the RightSolutions & Services.
Solution
Cloud & DevOps
AWS cloud architecture, DevOps, CI/CD and cost optimisation for reliable, scalable systems.
ExploreSolution
Data Management & Engineering
Pipelines, integration, data modelling and warehouses that bring every source into one reliable platform.
ExploreService
DataOps & Managed Data Services
Pipeline monitoring, incident response, SLAs and continuous improvement for your data platform.
ExploreService
Data Maturity Assessment
A fixed-scope review of your data, tools and team, with a scored and prioritised roadmap.
ExploreFor US, UK, EU & Middle East clients
Senior engineers with up to 14 years' experience, at a fraction of US, UK or European rates, with working hours that overlap yours.
For Bangladeshi businesses
The same international-standard team that serves global clients, with special local pricing in BDT.
Contracted SLAs, honest billing
Response times and deliverables are written into your contract. If we miss a contracted SLA, you don't pay for that incident. No hidden charges.
Modernise Without the Risk.
Talk to EXCO about your migration: target architecture, risk assessment and a delivery approach that removes uncertainty.