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Software Architecture

  • Infrastructure

    • Networking

      • Key Concepts:
        • ExpressRoute, VPN, Firewall
      • Questions:
        • What external services does the system connect to? (e.g. On-Prem DB, other cloud, etc.)
        • How do users interact and connect with the system? (e.g. User will VPN in and access web console)
        • Is access to the system public or locked down?
          • If locked down, how so? (e.g. VPN + AAD)
        • What are the on-prem requirements? (e.g. 1G u/d connection on-prem DC)

    • Compute

      • Key Concepts:
        • VM, VMSS, Azure Functions, Batch, Kubernetes
      • Questions:
        • Will the system run in containers and/or Kubernetes?
        • What are the application bottlenecks? (e.g. CPU, Memory, etc.)
        • What are the solution's scaling requirements? (e.g. Scale up specific microservice as part of "follow-the-sun" model)
        • What should trigger a scaling event? (e.g. CPU hits 70%)

    • Storage

      • Key Concepts:
        • Blob, NFS, SMB, Data Lake
      • Discovery Questions:
        • How does the system persist data? (e.g. user data is stored in MySQL, media files stored in blob)
        • What format is the data in? (e.g. images, 1000's of media files)
        • What are the data volume requirements (e.g. 1GB of MySQL data, 1TB of blob storage)

    • IoT

      • Key Concepts:
        • IoT Hub, IoT Central
      • Questions:
        • How are the IoT devices deployed?
        • How are the IoT devices maintained and upgraded?
        • What central repository are the IoT devices reporting to?
        • Do you use Digital Twins?

  • Third-party Integrations

    • Questions
      • What 3rd party systems does your system integreate with? (e.g. SMTP, MongoDB)
      • How do you plan to manage these 3rd party systems?
      • What Microsoft/Azure SaaS offerings do you plan to use? (e.g. Cognitive Services, etc.)

  • Platform

    • OS

      • Key Concepts
        • Linux Distros, Windows Server
      • Questions:
        • What OS can the system run on?
        • How do plan to manage updates when there's a critical security update?

    • Runtime

      • Key Concepts
        • Container, Kubernetes
      • Questions:
        • What is your build system?
        • How often do you build new executable artifacts?
        • How often do you deploy new executable artifacts?

    • App Platform/Development Framework

      • Key Concepts
        • C#, Python, NodeJS, 12 Factor App
      • Questions:
        • What language/framework is the system written in?
        • Does the system follow the 12 Factor Apps model?

  • Technical Roadmap

    • Is this a greenfield or brownfield app?
    • What optimizations do you foresee?
    • What are your highest technical priorities?