kaksha.dev

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Components

- API Gateway
- Load Balancers
    - Static LB Algorithms
        - RoundRobin
        - Weighted RR
        - IP Hashing
        - URL Hashing
    - Dynamic LB Algorithms
        - Least connected
        - Resource based
        - Least Response Time
- Discovery Service - Netflix Eureka service
- Session Management
    - Store Session ID in DB
    - Store Session ID in Local Cached
    - Store Session ID in Distributed Caching 
    - Stateless Tokens - JWT    

Types of Mobile Apps

• Native (Swift or Objective-C for IOS; Kotlin for Android)
  • Examples : WhatsApp, Google Maps, Spotify, LinkedLn
  • Pros :
    • Performance,
    • User Experience,
    • Access to HW, OS, GPS
    • Offline feature,
    • Download from App Store
  • Cons:
    • Seprate code base and build tools - Xcode(IOS) & Android Studio(Android)
    • Cost of development is high
    • Time to market
    • Separate teams
• Hybrid - combination of both native applications and web applications
  • React Native(Using React JS libraries), Ionic(HTML Based), Xamarine(C# & .Net)
  • Examples: GMail, Twitter(X), EverNote, Uber
  • Pros:
    • Runs on different Platforms
    • Single code base - low maintenance Cost
    • Low development cost
    • Centralized updates
  • Cons:
    • Slower than Native
    • Complexity in offline feature
    • Less Maintenance Cost
• PWA
  • ReactJs, Angular, Vue
  • Use of of IndexDB, localstorage, Service Workers
  • Examples: Facebook, Netflix, Google Docs
  • Pros
    • Single code base - low maintenace cost
    • Reqruired Knowledge of HTML CSS and JS only
    • Can be installed as APP
    • Very Easy updates
  • Cons:
    • Not very performant application compare to other 2
    • Limited access to HW
    • Requires User Permissions
    • Dependent of Internet Connectivity
• Web Only
  • Super easy to develop
  • Nothing local all centralized
  • Not installable - requried full internet connecitivy
  • Doesn’t feel like an Mobile App

Debug Slowness in Web Application

- Check connecvity
- Any recent deployment happened
- Any Software patches installed recently
- Top down approach - start from UI down to DB