Please enable JavaScript.

Coggle requires JavaScript to display documents.

Cloud-Computing (cloud must has these 5 characteristics (measured service,…

- - - - is transparent to the user
        
        how
        
        use load balancers
        
        use virtual machines for more computing resouces
        
        making the app multi-tenant
    - - unauthorized access to data because all users data are on the provider's servers
    - - integration protocol (http/Rest/Soap)
      - API
    - - Business Considerations
        
        Managing Cash Flow
        
        Reduce Platform Support
        
        Increase Sales Velocity and Customer Satisfaction
        
        Leverage Existing Software and Architecture
        
        Managing Uptime for a Global Customer Base
        
        Providing a Secure Environment
        
        Overall Cost
      - SaaS Architecture on AWS
        
        Traditional Web Application Hosting Architecture
        
        AWS Cloud Architecture for hosting SaaS Environments
        
        key Componenets
        
        Edge caching
        
        Elastic IPs and DNS
        
        Controlling access to hosts
        
        Load balancing across clusters
        
        Finding other hosts and services
        
        Caching within the web application
        
        Database configuration, backup and failover
        
        Storage and backup of data and assets
        
        Auto-scaling the fleet
        
        Failover with AWS
        
        Additional Architectural considerations
        
        No more network appliances
        
        Firewalls everywhere
        
        Multiple data centers available
        
        Treat hosts as ephemeral and dynamic
  - - - why not other platforms?
        
        portability
        
        extensibility
    - - load balancing
      - automatic scaling
      - integration with other services
      - pay as you go
  - - - is about structural design of a computer network
      - make successful arch
        
        arch should successfully optimize the use of its physical computing resouces in order to maximize cost saving and/or revenue for the organization
    - - processing capacity
      - data storage
- - - - bad or no tenant management
      - inefficient utilization of resouces
      - lack of elasticity and scalability and security
      - Common Mistakes
        
        Arch doesn't scale
        
        no tenant Management
        
        not understanding security
        
        not understanding the proper use of services
  - - - require huge effort in application arch so some solution will be use of multi-instance and virtualization
      - One-App
        
        each user has his data + config
      - multi-tenancy in SaaS needs
        
        Accelerated feature deliver
        
        one version used
        
        always updated
        
        hosted centrally
        
        vendor has full access to users data
    - - One-App
        
        each user has his own app instance + data+ config
    - - architectural styles
        
        components-based
        
        destructure the system's design into the individual components either on a logical or function basis
        
        componenets has interface and properties
        
        componenets can communicate with each other
        
        componenets are reused
        
        domain-based
        
        for large systems
        
        object oriented approach to design software based on the business domain(it's elements and behavior and the relationship between them)
        
        layer-based
        
        group functionality that is related as layers
        
        it's flexible if layering is done correctly
      - principles
        
        service contract
        
        autonomy
        
        reusability
        
        compoabiliity
        
        loose coupling
        
        statelessness
      - services
        
        are expandable
        
        separated
        
        can communicate with each other