[Modified] folder structure
This commit is contained in:
kananinirav
168
sections/cloud_computing.md
Normal file
168
sections/cloud_computing.md
Normal file
@@ -0,0 +1,168 @@
|
||||
# What is Cloud Computing?
|
||||
|
||||
* Cloud computing is the on-demand delivery of compute power, database storage, applications, and other IT resources
|
||||
* Through a cloud services platform with pay-as-you-go pricing
|
||||
* You can provision exactly the right type and size of computing resources you need
|
||||
* You can access as many resources as you need, almost instantly
|
||||
* Simple way to access servers, storage, databases and a set of application services
|
||||
* Amazon Web Services owns and maintains the network-connected hardware required for these application services, while you provision and use what you need via a web application.
|
||||
|
||||
## The Deployment Models of the Cloud
|
||||
|
||||
**Private Cloud:**
|
||||
|
||||
* Cloud services used by a single organization, not exposed to the public.
|
||||
* Complete control
|
||||
* Security for sensitive applications
|
||||
* Meet specific business needs
|
||||
|
||||
**Public Cloud:**
|
||||
|
||||
* Cloud resources owned and operated by a thirdparty cloud service provider delivered over the Internet.
|
||||
* Six Advantages of Cloud Computing
|
||||
|
||||
**Hybrid Cloud:**
|
||||
|
||||
* Keep some servers on premises and extend some capabilities to the Cloud
|
||||
* Control over sensitive assets in your private infrastructure
|
||||
* Flexibility and costeffectiveness of the public cloud
|
||||
|
||||
## The Five Characteristics of Cloud Computing
|
||||
|
||||
* **On-demand self service:**
|
||||
* Users can provision resources and use them without human interaction from the service provider
|
||||
* **Broad network access:**
|
||||
* Resources available over the network, and can be accessed by diverse client platforms
|
||||
* **Multi-tenancy and resource pooling:**
|
||||
* Multiple customers can share the same infrastructure and applications with security and privacy
|
||||
* Multiple customers are serviced from the same physical resources
|
||||
* **Rapid elasticity and scalability:**
|
||||
* Automatically and quickly acquire and dispose resources when needed
|
||||
* Quickly and easily scale based on demand
|
||||
* **Measured service:**
|
||||
* Usage is measured, users pay correctly for what they have used
|
||||
|
||||
## Six Advantages of Cloud Computing
|
||||
|
||||
* **Trade capital expense (CAPEX) for operational expense (OPEX)**
|
||||
* Pay On-Demand: don’t own hardware
|
||||
* Reduced Total Cost of Ownership (TCO) & Operational Expense (OPEX)
|
||||
* **Benefit from massive economies of scale**
|
||||
* Prices are reduced as AWS is more efficient due to large scale
|
||||
* **Stop guessing capacity**
|
||||
* Scale based on actual measured usage
|
||||
* **Increase speed and agility**
|
||||
* **Stop spending money running and maintaining data centers**
|
||||
* **Go global in minutes:** leverage the AWS global infrastructure
|
||||
|
||||
## Problems solved by the Cloud
|
||||
|
||||
* **Flexibility:** change resource types when needed
|
||||
* **Cost-Effectiveness:** pay as you go, for what you use
|
||||
* **Scalability:** accommodate larger loads by making hardware stronger or adding additional nodes
|
||||
* **Elasticity:** ability to scale out and scale-in when needed
|
||||
* **High-availability and fault-tolerance:** build across data centers
|
||||
* **Agility:** rapidly develop, test and launch software applications
|
||||
|
||||
## Types of Cloud Computing
|
||||
|
||||
* **Infrastructure as a Service (IaaS)**
|
||||
* Provide building blocks for cloud IT
|
||||
* Provides networking, computers, data storage space
|
||||
* Highest level of flexibility
|
||||
* Easy parallel with traditional on-premises IT
|
||||
* **Platform as a Service (PaaS)**
|
||||
* Removes the need for your organization to manage the underlying infrastructure
|
||||
* Focus on the deployment and management of your applications
|
||||
* **Software as a Service (SaaS)**
|
||||
* Completed product that is run and managed by the service provider
|
||||
|
||||
## Example of Cloud Computing Types
|
||||
|
||||
* **Infrastructure as a Service:**
|
||||
* Amazon EC2 (on AWS)
|
||||
* GCP, Azure, Rackspace, Digital Ocean, Linode
|
||||
* Platform as a Service:
|
||||
* Elastic Beanstalk (on AWS)
|
||||
* Heroku, Google App Engine (GCP), Windows Azure (Microsoft)
|
||||
* Software as a Service:
|
||||
* Many AWS services (ex: Rekognition for Machine Learning)
|
||||
* Google Apps (Gmail), Dropbox, Zoom
|
||||
|
||||
## Pricing of the Cloud – Quick Overview
|
||||
|
||||
* AWS has 3 pricing fundamentals, following the pay-as-you-go pricing model
|
||||
* **Compute:**
|
||||
* Pay for compute time
|
||||
* **Storage:**
|
||||
* Pay for data stored in the Cloud
|
||||
* **Data transfer OUT of the Cloud:**
|
||||
* Data transfer IN is free
|
||||
* Solves the expensive issue of traditional IT
|
||||
|
||||
## AWS Cloud Use Cases
|
||||
|
||||
* AWS enables you to build sophisticated, scalable applications
|
||||
* Applicable to a diverse set of industries
|
||||
* Use cases include
|
||||
* Enterprise IT, Backup & Storage, Big Data analytics
|
||||
* Website hosting, Mobile & Social Apps
|
||||
* Gaming
|
||||
|
||||
## AWS Global Infrastructure
|
||||
|
||||
* AWS Regions
|
||||
* AWS Availability Zones
|
||||
* AWS Data Centers
|
||||
* AWS Edge Locations / Points of Presence
|
||||
* <https://infrastructure.aws/>
|
||||
|
||||
## AWS Regions
|
||||
|
||||
* AWS has Regions all around the world
|
||||
* Names can be us-east-1, eu-west-3…
|
||||
* A region is a **cluster of data centers**
|
||||
* **Most AWS services are region-scoped**
|
||||
|
||||
## How to choose an AWS Region?
|
||||
|
||||
If you need to launch a new application, where should you do it?
|
||||
|
||||
* **Compliance with data governance and legal requirements:** data never leaves a region without your explicit permission
|
||||
* **Proximity to customers:** reduced latency
|
||||
* **Available services within a Region:** new services and new features aren’t available in every Region
|
||||
* **Pricing:** pricing varies region to region and is transparent in the service pricing page
|
||||
|
||||
## AWS Availability Zones
|
||||
|
||||
* Each region has many availability zones (usually 3, min is 2, max is 6). Example:
|
||||
* ap-southeast-2a
|
||||
* ap-southeast-2b
|
||||
* ap-southeast-2c
|
||||
* Each availability zone (AZ) is one or more discrete data centers with redundant power, networking, and connectivity
|
||||
* They’re separate from each other, so that they’re isolated from disasters
|
||||
* They’re connected with high bandwidth, ultra-low latency networking
|
||||
|
||||
## AWS Points of Presence (Edge Locations)
|
||||
|
||||
* Amazon has 216 Points of Presence (205 Edge Locations & 11 Regional Caches) in 84 cities across 42 countries
|
||||
* Content is delivered to end users with lower latency
|
||||
|
||||
## Tour of the AWS Console
|
||||
|
||||
* **AWS has Global Services:**
|
||||
* Identity and Access Management (IAM)
|
||||
* Route 53 (DNS service)
|
||||
* CloudFront (Content Delivery Network)
|
||||
* WAF (Web Application Firewall)
|
||||
* **Most AWS services are Region-scoped:**
|
||||
* Amazon EC2 (Infrastructure as a Service)
|
||||
* Elastic Beanstalk (Platform as a Service)
|
||||
* Lambda (Function as a Service)
|
||||
* Rekognition (Software as a Service)
|
||||
* **Region Table:** <https://aws.amazon.com/about-aws/global-infrastructure/regional-product-services>
|
||||
|
||||
## Shared Responsibility Model diagram
|
||||
|
||||
* CUSTOMER = RESPONSIBILITY FOR THE SECURITY **IN** THE CLOUD
|
||||
* AWS = RESPONSIBILITY FOR THE SECURITY **OF** THE CLOUD
|
||||
Reference in New Issue
Block a user