Cloud Consulting & Migration Company
Smooth, Risk-Free Migration to the Cloud with Minimal Downtime and Maximum Efficiency
Cloud Readiness Assessment, 6Rs Migration Strategy, AWS/Azure/GCP Migration, Database Migration, TCO Analysis & Post-Migration Optimisation - From On-Premise to Cloud Without Business Disruption
Every organisation's on-premise infrastructure carries invisible costs: server hardware on a 5-year depreciation cycle, data centre floor space and power scaling with peak capacity, IT staff time patching operating systems instead of building products, and a capital expenditure cycle forcing infrastructure decisions 3 years ahead of actual need. Cloud migration addresses all of these - but only when planned correctly. A migration without assessment produces a cloud bill higher than the on-premise cost, applications performing worse due to incorrect instance sizing, and a migration that is technically complete but practically broken because nobody validated application behaviour under cloud networking conditions.
AWS + Azure + GCP
NDA Protected
Free Consultation
80+
Cloud Migrations Completed
0
Data Loss Incidents - Track Record
35%
Average On-Premise Cost Reduction
6Rs
Strategy Applied to Every Application
What Is Cloud Migration and Why Does It Require Careful Planning?
Cloud migration is the process of moving an organisation's workloads from on-premise data centres to cloud platforms. It sounds simple - copy the server to the cloud and run it there. In practice, cloud migration is one of the most complex IT projects an organisation undertakes, because it simultaneously relocates the technology, revalidates application behaviour in a different environment, manages the operational transition, and ensures business continuity throughout.
The complexity comes from dependencies. Most organisations have accumulated 10-20 years of on-premise applications with informal connections: application A queries application B's database directly, application C depends on a shared network file share, application D's authentication requires an on-premise Active Directory. These dependencies are frequently undocumented - discovered only when you move application A to the cloud and it starts returning errors because it cannot reach application B's on-premise database. Discovery before migration - through dependency mapping - is the most critical phase of any cloud migration project.
At Evolution Infosystem, cloud consulting and migration follows a structured methodology: readiness assessment (documenting every application, database, dependency, and compliance requirement), 6Rs strategy selection per application, wave planning respecting dependencies, migration execution with zero-data-loss guarantees, and post-migration optimisation. We have completed 80+ cloud migrations to AWS, Azure, and GCP for organisations in India, the US, UK, and Australia.
Business Drivers for Cloud Migration
- End-of-life server hardware requiring capital refresh
- Data centre lease expiry - forced infrastructure decision
- IT team spending 60%+ time on infrastructure maintenance
- Application scaling limited by physical hardware
- Disaster recovery inadequate or untested
- Remote access to on-premise apps difficult post-COVID
- Developer environments slow due to on-premise provisioning
- Compliance requirements for data centre auditing
What Cloud Migration Delivers When Done Right
- Elastic capacity - scale up for peak, down off-peak
- Pay-per-use - no idle hardware cost
- Managed services - cloud handles patching, backups, HA
- Disaster recovery - Multi-AZ from day one
- Developer velocity - provision test environments in minutes
- Global deployment - serve users from nearest region
- Security improvement - cloud-native security services
- 25-40% cost reduction over 3 years typical
Our Cloud Consulting & Migration Services
Cloud Readiness Assessment
Comprehensive current-state assessment: application inventory, dependency mapping (network traffic analysis + firewall review + application code review), database inventory (engine, version, size, stored procedure count), performance baselining, compliance requirements (RBI/SEBI data localisation, HIPAA/DISHA), and licensing audit (SQL Server and Windows Server BYOL implications). Output: Application Portfolio Document + Dependency Map + Cloud Readiness Score + Compliance Assessment + Licensing Audit.
Cloud Migration Strategy (6Rs)
Per-application strategy: Rehost (VM lift-and-shift), Replatform (managed services), Repurchase (SaaS replacement), Refactor (cloud-native re-arch), Retire (decommission), Retain (keep on-premise). Wave planning: dependency-sequenced migration waves - prerequisites migrate before dependents. TCO projection: 3-year on-premise vs cloud cost comparison per wave with ROI calculation.
AWS Cloud Migration
AWS Application Migration Service (MGN) for agent-based continuous server replication with test cutover before production cutover. AWS Migration Hub for centralised tracking. EC2 right-sizing post-migration. AWS Direct Connect or Site-to-Site VPN for hybrid connectivity. AWS Snow family for large data volumes. Re-platforming: EC2 to ECS Fargate, RDS for managed databases, S3 for file storage.
Azure Cloud Migration
Azure Migrate for agentless assessment. Azure Site Recovery (ASR) for continuous replication and cutover (RTO minutes). Azure Database Migration Service for SQL Server, MySQL, PostgreSQL, Oracle. Azure AD Connect for hybrid identity SSO. Azure Arc for managing retained on-premise servers. Re-platforming: VM to Azure App Service, Azure SQL Managed Instance for SQL Server with full compatibility.
Database Migration to Cloud
The highest-risk migration component. SQL Server to Azure SQL/RDS: DMA for compatibility, SSMA for schema, DMS for data. MySQL/PostgreSQL to RDS: AWS DMS with change data capture (near-zero downtime). Oracle to PostgreSQL: AWS Schema Conversion Tool + manual PL/SQL remediation + DMS. Validation: pre/post row count and checksum, parallel running period, rollback procedure tested before cutover.
Cloud TCO Analysis
Full cost comparison: on-premise (hardware depreciation, co-lo/data centre, power, cooling, maintenance, OS licenses, IT staff time) vs cloud (compute with Reserved Instance discounts, managed database, storage, networking, reduced operational overhead). India-specific: GST on cloud services (18%), BYOL vs cloud licensing for SQL Server, AWS/Azure INR billing. Typical finding: 30-50% savings over 3-5 years.
Hybrid Cloud Architecture
Managing the transition state where some workloads are cloud, some on-premise: Site-to-Site VPN or Direct Connect/ExpressRoute for encrypted private connectivity, DNS resolution for both environments, identity federation (Azure AD Connect / AWS IAM Identity Centre with on-premise AD), monitoring unification across hybrid footprint, and network routing configuration for cross-environment application communication.
Post-Migration Optimisation
Validation: application performance vs on-premise baseline, load testing at peak load, integration testing. Rightsizing: AWS Compute Optimizer / Azure Advisor recommendations. FinOps: Reserved Instance / Savings Plans purchase planning (40-60% discount), storage lifecycle policies, idle resource elimination. Well-Architected Review: AWS WAF or Azure WAF review producing improvement roadmap.
Server Hardware Approaching End of Life - Or IT Team Spending More Time on Infrastructure Than on Your Business?
Tell us your application count, current infrastructure setup, and migration timeline. We will provide a free readiness assessment and TCO comparison.
Why Choose Evolution Infosystem for Cloud Consulting & Migration?
Dependency Mapping Before the First Server Moves
Network traffic analysis identifies every undiscovered application-to-database connection before migration begins. The migration wave plan is derived from the dependency graph - prerequisites migrate before dependents. No mid-migration surprises from undocumented connections.
Rollback Procedure Tested Before Every Cutover
Pre-set low DNS TTL, documented data sync strategy for writes received post-cutover, and rollback success criteria defined before production cutover. Rollback tested on staging migration. Every cutover has a two-way door - not a one-way leap.
Near-Zero Downtime via Continuous Replication
AWS MGN or Azure ASR replicates continuously from agent install. Production cutover = minutes, not hours. Banking and healthcare applications with strict downtime requirements benefit most - cutover windows as short as 5-15 minutes.
RBI / SEBI Data Localisation Compliance
AWS Mumbai (ap-south-1) and Azure India regions designed into BFSI migration architecture from day one. No discovering compliance gaps during RBI audit.
Zero Data Loss - Row Count and Checksum Validation
Pre-migration row count + checksum per table. Post-migration comparison. 21-day parallel running period for large databases. We do not declare migration complete until row counts and checksums match.
Honest TCO - Not Cloud-First Bias
We conduct TCO analysis that includes full on-premise cost honestly. In some cases we recommend specific workloads not migrate - a high-utilisation on-premise database with expensive cloud egress may be more economical on dedicated hardware. We tell clients this.
Our Cloud Migration Technology Stack
| CATEGORY | AWS | AZURE | GCP | MULTI-CLOUD | OPEN SOURCE |
|---|---|---|---|---|---|
| Discovery | AWS Migration Hub | Azure Migrate | Google Migrate | Movere (MS) | CloudPhysics |
| Server Migration | AWS MGN | Azure Site Recovery | Migrate for Compute | VMware HCX | CloudEndure |
| Database Migration | AWS DMS + SCT | Azure DMS | Database Migrate Svc | - | - |
| Schema Conversion | AWS SCT | SSMA | pgloader | - | ora2pg |
| Large Data Transfer | Snowball Edge | Azure Data Box | Transfer Appliance | - | rsync |
| Network Connectivity | AWS Direct Connect | Azure ExpressRoute | Cloud Interconnect | VPN | WireGuard |
| Identity Federation | IAM Identity Centre | Azure AD Connect | Cloud Identity | - | LDAP sync |
| IaC Post-Migration | Terraform + CFN | Terraform + Bicep | Terraform | Terraform | Pulumi |
| Container Migration | ECS + ECR | AKS + ACR | GKE + GCR | - | Docker |
| Monitoring Post-Migration | CloudWatch | Azure Monitor | Cloud Monitoring | Datadog | Prometheus |
| Cost Analysis | Cost Explorer | Azure Cost Mgmt | Cloud Billing | CloudHealth | Infracost |
| Well-Architected | AWS WA Tool | Azure WA Framework | Google PRA | - | - |
| DR Testing | AWS Resilience Hub | Azure Site Recovery | Cloud DR | - | Chaos Engineering |
Category
- AWSAWS Migration Hub
- AZUREAzure Migrate
- GCPGoogle Migrate
- MULTI-CLOUDMovere (MS)
- OPEN SOURCECloudPhysics
Our Cloud Migration Process - 6 Phases
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Cloud Migration Use Cases by Sector
Manufacturing and Industrial
ERP hosting, legacy systems, dev/test environments
ERP assessment first - SAP on-premise often recommended Retain due to licensing and performance constraints. MES - Rehost to VM, evaluate replatform after stable. BI/reporting - Replatform to Redshift/Synapse for analytics. Dev/test environments - highest-value Rehost (pay-per-use vs always-on on-premise). IT applications (file server, intranet) - Repurchase to M365 + SharePoint. Typical result: data centre footprint reduced 60%, IT hardware refresh cycle eliminated.
BFSI
RBI data localisation, core banking, phased migration
RBI compliance assessment first - Mumbai region for payment data. Core banking Retain (CBS vendor certification required). Customer-facing web/mobile Rehost then Replatform (auto-scaling for demand peaks). Analytics Replatform to Redshift/Synapse. CRM Repurchase to Dynamics 365. DR win: VPN + RDS read replica replaces expensive secondary data centre at fraction of cost.
IT Services and SaaS
Dev environments, product hosting, CI/CD, tools
Most valuable first move: dev/test from always-on on-premise to cloud (pay per 8 hours/day). CI/CD Repurchase to GitHub Actions or Azure DevOps. Product Replatform to ECS Fargate / App Service. Internal tools Repurchase to Atlassian Cloud / Google Workspace. File storage Repurchase to SharePoint / Google Drive. Typical 50-person IT company: on-premise eliminated in 6-9 months.
Healthcare
DISHA compliance, EMR, PACS imaging, remote access
DISHA compliance assessment first. EMR - assess vendor SaaS version (Repurchase opportunity). PACS - large data volumes, Snowball for initial bulk transfer. Admin/billing Rehost or Replatform. Remote access improvement - primary driver post-COVID; cloud-hosted apps accessible without VPN complexity. DR: multi-AZ RDS for patient data replaces secondary data centre.
Education and EdTech
Exam systems, LMS, student portals, video delivery
Highest business case: exam result publication - crashing on result day is a PR disaster. Cloud auto-scaling is the only reliable solution (Refactor or Replatform to ECS). LMS: Repurchase to SaaS if vendor offers it. Student information Rehost. Email/collaboration Repurchase to Google Workspace for Education. Video lectures: S3 + CloudFront significantly cheaper than on-premise storage and delivery.
Retail and E-Commerce
Sale day spikes, CDN, database scale, POS
Primary driver: on-premise crashing on sale day. E-commerce app Replatform to ECS Fargate + Aurora (auto-scaling). Static assets S3 + CloudFront (immediate win - 99% served from edge). WMS Rehost (complex dependencies - lift-and-shift first). POS back-office Replatform. Result: sale-day capacity from fixed on-premise ceiling to unlimited cloud scale.
Data centre lease expiring?
A data centre exit has a hard deadline. We plan and execute cloud migrations with a guaranteed timeline - dependency mapping, wave planning, zero-data-loss database migration.
Want to see our migration work?
Browse 80+ cloud migrations - manufacturing, NBFC, e-commerce, IT services - all completed with zero data loss.
The 6Rs of Cloud Migration - Which Strategy for Each Application?
| Strategy |  |  |  |  |  |
|---|---|---|---|---|---|
| Rehost (Lift & Shift) | Fastest | Low - VM in cloud | Low | Low | Legacy apps, migration deadline, no re-arch budget |
| Replatform | Medium | Medium - managed services | Medium | Medium | DB to RDS, app server to containers |
| Repurchase | Fast | High - SaaS vs self-managed | Low ongoing | Low | Exchange → M365, CRM → Dynamics 365 |
| Refactor / Re-arch | Slowest | Highest - cloud-native | High initial | High | Apps needing auto-scale, modernisation priority |
| Retire | Immediate | Full removal | Zero | None | No active users, duplicate or EOL applications |
| Retain | N/A | None (deferred) | No change | None | Compliance block, active major upgrade, high egress cost |
PRACTICAL 6R SPLIT - TYPICAL ENTERPRISE: Most organisations with 15-20 on-premise applications find: Rehost 40-50% (legacy LOB apps), Replatform 20-30% (databases to RDS, apps to containers), Repurchase 10-15% (Exchange, collaboration, CRM), Retire 5-10%, Retain 5-10%, Refactor 5-10% (highest-value cloud-native candidates).- The mistake is treating the entire portfolio as Refactor. Refactoring takes 5-10x longer per application than rehosting. An organisation refactoring all 20 applications takes 18-24 months. The same organisation rehosting 10, replatforming 5, repurchasing 3, and retiring 2 completes in 4-6 months and captures 80% of the cloud benefit.
Frequently Asked Questions - Cloud Consulting & Migration
Cloud migration is moving applications, databases, and infrastructure from on-premise servers to AWS, Azure, or GCP. Main benefits: cost efficiency (pay only for what you use - no idle hardware), scalability (scale up in minutes for peak demand), managed services (cloud handles OS patching, backups, and HA), disaster recovery (Multi-AZ from day one), developer velocity (provision test environments in minutes not weeks), and operational agility. For India: eliminating the hardware refresh cycle and reducing data centre colocation costs are the two most significant financial drivers. Average 3-year total cost of ownership savings: 30-50% versus on-premise.
(1) Undiscovered dependencies - app X fails because it was communicating with app Y's on-premise database. Avoid: network traffic analysis before migration. (2) Database data loss - silent row loss not detected until production. Avoid: row count and checksum validation, parallel running period. (3) Performance regression - incorrect instance sizing. Avoid: on-premise baseline + load testing before cutover. (4) No rollback plan. Avoid: documented, tested rollback for every cutover. (5) Cost overruns - cloud bill higher than on-premise. Avoid: TCO analysis + FinOps controls from day one. (6) Security regression - open ports, weak IAM. Avoid: security baseline checklist per migrated workload.
The 6Rs: (1) Rehost/Lift-and-Shift - move to cloud VM, no code changes, fastest, minimum benefit. (2) Replatform - minor changes for managed services (MySQL to RDS). (3) Repurchase - SaaS replacement (Exchange to M365). (4) Refactor/Re-architect - cloud-native redesign, highest benefit, most time. (5) Retire - decommission (no active users, duplicate). (6) Retain - keep on-premise (compliance, latency, active major upgrade). Most migrations use a combination - not every application needs the same strategy.
Near-zero downtime uses AWS DMS with change data capture (CDC): (1) Schema migration via AWS SCT. (2) Full load - DMS copies all data. (3) CDC - DMS continuously replicates all changes from source. (4) Validation - row count and checksum comparison. (5) Parallel running - daily validation confirms no divergence. (6) Cutover - brief maintenance mode (5-15 minutes), DMS catches final changes, connection string updated. (7) Rollback: revert connection string to on-premise - 2-minute window. Total user-facing downtime: 5-15 minutes.
Single application: 2-6 weeks. Medium organisation 10-15 applications: 3-5 months. Large enterprise 30+ applications: 6-12 months. Database migration is often the longest component - 1.8 TB SQL Server requires careful DMS setup, parallel validation, and a conservative 21-day running period. Factors extending timeline: undocumented dependencies discovered during assessment, Oracle licensing review, regulatory compliance review (RBI/SEBI), and custom code in legacy applications.
TCO (Total Cost of Ownership) analysis compares full on-premise costs versus cloud costs over 3-5 years. On-premise: server hardware (purchase + depreciation), storage, networking, data centre rent/owned, power and cooling, maintenance contracts, OS/software licenses, IT staff infrastructure time. Cloud: compute (with Reserved Instance discounts applied to baseline), managed database, storage, data transfer, reduced IT overhead. India-specific: include 18% GST on cloud provider invoices, SQL Server BYOL savings with Software Assurance, Azure/AWS INR billing. Typical finding: cloud is 30-50% cheaper over 5 years.
Lift-and-shift (Rehost): copy application to cloud VM without code changes. Fastest (2-6 weeks/app). Limited cloud benefit - no auto-scaling, no managed services, similar cost. Cloud-native (Refactor): redesign using auto-scaling containers, managed database, serverless. Full cloud benefit but 5-10x longer per application. Practical approach: lift-and-shift applications with low cloud-native value, refactor applications where cloud-native significantly improves business capability.
Partial migration (hybrid) is valid and common - most large migrations are hybrid for 12-24 months during phased execution. Some applications should remain on-premise permanently: manufacturing SCADA systems with millisecond PLC latency requirements, applications with compliance constraints cloud cannot meet, or applications where migration cost exceeds benefit. The goal is not 'all applications in cloud' - it is 'every application in the environment providing most value'. For most modern applications that is cloud. For specific operational or compliance-constrained workloads it may be on-premise or a hybrid edge-cloud architecture.
Cloud readiness assessment, 6Rs migration strategy, AWS migration, Azure migration, GCP migration, database migration (MySQL, PostgreSQL, SQL Server, Oracle via DMS/SCT), cloud TCO analysis, hybrid cloud architecture, and post-migration optimisation.
Yes - MySQL, PostgreSQL, SQL Server, Oracle, and MongoDB to RDS, Aurora, Azure SQL, and Cloud SQL using AWS DMS with change data capture for near-zero downtime, with row count and checksum validation.
Yes - AWS Mumbai (ap-south-1) and Azure India regions designed into BFSI migration architecture from day one.
Single application 2-6 weeks; 10-15 app organisation 3-5 months; large enterprise 30+ apps 6-12 months.
35% average on-premise cost reduction - from hardware maintenance elimination, colocation savings, rightsized cloud resources, and reduced IT staff time on infrastructure.
Ready to Move to Cloud - Without Downtime, Data Loss, or Paying More Than On-Premise?
80+ migrations. Manufacturing, BFSI, e-commerce, IT services. AWS, Azure, GCP. Zero data loss. 35% cost reduction average.