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AWS Self Learning Part1

Cloud Concepts Overview

What is cloud computing

  1. Cloud service
    • fully management service
    • via internet
  2. Cloud computing
    • on-demand
    • via internet
    • pay as you go
  3. Cloud computing primary categories
    • IaaS
    • PaaS
    • SaaS
  4. Cloud deployment models
    • All in cloud
    • Hybrid
    • Private cloud (On premises)

All in cloud VS On premises

All in cloudOn premises
No upfront investmentLarge initial purchase
Low ongoing costsLabor, patches, and upgrade cycles
Focus on innovationSystems administration
Flexible capacityFixed capacity
Speed and agilityLong procurement cycle and setup
Global reach on demandLimited geographic regions
  1. Cloud terminology
    • High availability (可用性)
    • Available when you need it * Fault tolerance (容錯力)
    • Remain functional with certain level of errors existing * scalability (擴展性)
    • Ability to scale up easily when demand increased * Elasticity (彈性)
    • Ability to grow but to reduce in size when necessary

Six benefits of cloud computing

  1. Advantages
    • Trade Capital Expense for Variable Expense
    • Benefit from massive economies of scale, for lower usage price
    • Eliminate predicting capacity
    • Increase speed and agility
    • Stop spending money running and maintaining data centers
    • Go global in minutes

What is AWS

  1. What is web service?
    • Software available over internet
    • Use standardized format (XML or JSON) for request and response
    • An API interaction
    • Not tie to any OS
    • Is discoverable
  2. AWS by category
    • Core services
    • Infrastructure services such as compute, networking, storage, applications, databases, and analytics * Foundational services
    • Cloud-based solutions for the analytics, enterprise, mobile, and IoT platforms * Developer and operation services
    • Enable developers and IT operations professionals practicing DevOps to rapidly and safely deliver software

AWS cloud adoption framework (CAF)

  1. Help organizations develop efficient and effective plans for cloud adoption

  2. Six core perspectives

    • Business
    • People
    • Governance
    • Platform
    • Security
    • Operations

Cloud Economics

Fundamentals of aws pricing

  1. AWS fundamentals
    • Pay for
    • Compute, Storage, Data transfer out
    • Data transfer in and between services in the same region is free
    • Aggregated data transfer and charge at transfer rate
      • EC2, S3, RDS, SimpleDB, SQS, SNS, VPC
  2. Pricing model
    • Pay per use
    • Pay less when you reserve
    • Save up to 75%
    • AURI, PURI, NURI * Pay less when you use more
    • Tiered pricing
    • S3, EBS, EFS * Pay even less as AWS grows * Custom pricing is available
    • For high-volume projects with unique requirements
  3. Consolidated billing
    • Consolidate payment for multiple AWS or AISPL accounts for combined usage for tiered benefits

Total cost of ownership

  1. What is TCO-Total cost of ownership
    • Total cost of an asset plus cost to operate it
    • Total cost of purchasing and operating a technology product during its useful life
    • Financial estimate intended to help buyers and owners determine the direct and indirect costs of a product or system
  2. On premise VS On cloud
    • On premises IT is a discussion about
    • Capital expenditure
    • Long planning cycles
    • Multiple components to buy, build, manage, and refresh over time
    • Staffs hiring with special or specific skill needed * On cloud is a discussion about
    • Flexibility
    • Agility
    • Consumption based costs
  3. TCO is used for comparing the costs of running an entire infrastructure environment for a specific workload in an on-premises or co-location facility to the same workload running on a cloud-based infrastructure

  4. ROI analysis over cloud to premises
    • Hard benefits
    • Reduced spending on compute, storage, networking, security
    • Avoidance of hardware and software purchases (CapEx)
    • Reductions in operational costs, backup, DR
    • Reduction in operations personnel * Soft benefits
    • Reuse of service and application that allow you define, redefine solutions using the same cloud service
    • Increase develop productivity
    • Improved customer satisfaction
    • Improved employee morale
    • Agile business process able to quickly respond to new and emerging opportunities
    • Increase global reach

AWS Infrastructure

Global Infrastructure

  1. Global infrastructure breaks into
    • Regions
    • Availability zones
    • Edge locations
    • Data centers < Availability zones < Regions
  2. Data centers
    • Foundation of AWS infrastructure
    • Build in cluster
    • Redundant design for fault tolerance
    • Critical system components are backed up accross AZs to ensure availability
    • Deploy infrastructure to support availability with continuously monitoring serivce usage
    • Customer data traffic is redirected automatically in case of failure
    • 50,000 ~ 80,000 physical servers per data center
    • Are all online, no data center is cold
    • Custom network equipment
    • Multi-ODM sourced network equipment
    • Custom network protocal stack
  3. Region
    • Geographical location
    • Consist two or more physically separated and isolated AZs
    • Isolated from one another to achieve fault tolerance and stability
    • Data replication across regions are off by default
  4. Availability zone
    • Physically separated and isolated
    • Consist of one or more discrete data center
    • Design for fault isolation
    • Build redundantly for fault tolerance
    • Connected to other AZ in the same region using private links
    • Redundantly connected to multiple tier-1 transit providers
    • Equipped with uninterruptible power supplies, cooling equipment, backup generators and security to ensure uninterrupted operations
  5. Edge locations
    • Where users access AWS services
    • Used for CDN, Route53, Shield and WAF
    • Regional edge caches
    • Between source server and edge location
    • Used for infrequently access contents, S3 excluded
  6. Infrastructure features
    • Elastic and scalable
    • Fault tolerant with redundancy
    • high availability with minimal down time
    • minimal to no human intervention
    • Provides
    • Compute
    • Networking
    • Storage
    • Database
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