🧱 Architecture Whiteboard — IaaS · PaaS · SaaS

Drag a component (left) onto a target (right). On drop, POST api/architecture/map validates the pairing. A correct drop turns the target green and renders the shared-responsibility layers (what you keep vs what the provider takes). A wrong drop shakes red and explains the right service model.
Click any target or component to read what it is without dragging.
▶ Animate replication plays block-level replication (AWS MGN / Azure Migrate) in the flow diagram.
↺ Reset board puts components back.

VMware ESXi clustersHypervisor · 3,500 VMs

Hyper-V hostsHypervisor · 900 VMs

Oracle RACDatabase · 12 TB

Exchange farmEmail · 8 servers

MainframeCore ledger

IaaSAWS EC2 (Nitro hypervisor)

IaaSAzure Virtual Machines

PaaSAmazon RDS for Oracle

PaaSAzure SQL Database

SaaSMicrosoft 365 (Exchange Online)

RetainStay on-prem (for now)

0 / 5 mapped

Drag a component, or click one to read about it.

Mapping results appear here.

Replication flow

Source VMagent installed

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Block replicationcontinuous

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Staging areacloud subnet

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Test launchisolated

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Cutover launchproduction

Click a node to learn what it does.

Hypervisor: software that slices a physical host into VMs. ESXi/Hyper-V on-prem; Nitro (AWS) or Azure's host OS in cloud — you never see it.
IaaS: you keep the guest OS. PaaS: provider keeps OS + engine. SaaS: provider keeps everything but identity/data policy.

Each step up the stack removes undifferentiated toil — patching, backups, HA.
Shared-responsibility clarity prevents the “I thought AWS backed that up” incident.

Oracle licensing on cloud vCPUs (core factor) can double cost — check BYOL.
Exchange → M365 needs hybrid identity (Entra ID Connect) first.
Assuming PaaS removes your backup responsibility entirely — you still own retention policy.

Layer	On-prem	IaaS	PaaS	SaaS
Facilities, hardware, hypervisor	You	Provider	Provider	Provider
Guest OS patching	You	You	Provider	Provider
DB engine / middleware	You	You	Provider	Provider
Application code	You	You	You	Provider
Identity, data classification	You	You	You	You

🐍 Python executed on the server (map_component)

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