What are Spot Instances in AWS ?

A Spot Instance is an unused EC2 instance that is available for less than the On-Demand price. Because Spot Instances enable you to request unused EC2 instances at steep discounts, you can lower your Amazon EC2 costs significantly. The hourly price for a Spot Instance is called a Spot price.  Your Spot Instance runs whenever capacity is available and the maximum price per hour for your request exceeds the Spot price.

Spot Instances are well-suited for data analysis, batch jobs, background processing, and optional tasks.

What is AWS Regions and Availability Zones

AWS Regions and Availability Zones

Amazon cloud computing resources are hosted in multiple locations world-wide. These locations are composed of AWS Regions and Availability Zones. Each AWS Region is a separate geographic area. Each AWS Region has multiple, isolated locations known as Availability Zones

Region Name Region Endpoint Protocol
US East (Ohio) us-east-2 rds.us-east-2.amazonaws.com HTTPS
US East (N. Virginia) us-east-1 rds.us-east-1.amazonaws.com HTTPS
US West (N. California) us-west-1 rds.us-west-1.amazonaws.com HTTPS
US West (Oregon) us-west-2 rds.us-west-2.amazonaws.com HTTPS
Asia Pacific (Hong Kong) ap-east-1 rds.ap-east-1.amazonaws.com HTTPS
Asia Pacific (Mumbai) ap-south-1 rds.ap-south-1.amazonaws.com HTTPS
Asia Pacific (Osaka-Local) ap-northeast-3 rds.ap-northeast-3.amazonaws.com HTTPS
Asia Pacific (Seoul) ap-northeast-2 rds.ap-northeast-2.amazonaws.com HTTPS
Asia Pacific (Singapore) ap-southeast-1 rds.ap-southeast-1.amazonaws.com HTTPS
Asia Pacific (Sydney) ap-southeast-2 rds.ap-southeast-2.amazonaws.com HTTPS
Asia Pacific (Tokyo) ap-northeast-1 rds.ap-northeast-1.amazonaws.com HTTPS
Canada (Central) ca-central-1 rds.ca-central-1.amazonaws.com HTTPS
China (Beijing) cn-north-1 rds.cn-north-1.amazonaws.com.cn HTTPS
China (Ningxia) cn-northwest-1 rds.cn-northwest-1.amazonaws.com.cn HTTPS
EU (Frankfurt) eu-central-1 rds.eu-central-1.amazonaws.com HTTPS
EU (Ireland) eu-west-1 rds.eu-west-1.amazonaws.com HTTPS
EU (London) eu-west-2 rds.eu-west-2.amazonaws.com HTTPS
EU (Paris) eu-west-3 rds.eu-west-3.amazonaws.com HTTPS
EU (Stockholm) eu-north-1 rds.eu-north-1.amazonaws.com HTTPS
Middle East (Bahrain) me-south-1 rds.me-south-1.amazonaws.com HTTPS
South America (Sao Paulo) sa-east-1 rds.sa-east-1.amazonaws.com HTTPS
AWS GovCloud (US-East) us-gov-east-1 rds.us-gov-east-1.amazonaws.com HTTPS
AWS GovCloud (US-West) us-gov-west-1 rds.us-gov-west-1.amazonaws.com HTTPS

How to quickly configure AWS CLI

Quickly Configuring the AWS CLI

For general use, the aws configure command is the fastest way to set up your AWS CLI installation. The following example shows sample values. Replace them with your own values as described in the following sections.

$ aws configure
AWS Secret Access Key [None]: wJalrXUtnFEMI/K7MDENG/bPxRfiCYEXAMPLEKEY
Default region name [None]: us-west-2
Default output format [None]: json
When you enter this command, the AWS CLI prompts you for four pieces of information (access key, secret access key, AWS Region, and output format). These are described in the following sections. The AWS CLI stores this information in a profile (a collection of settings) named default. The information in the default profile is used any time you run an AWS CLI command that doesn’t explicitly specify a profile to use.

AWS Global Infrastructure

AWS Global Infrastructure

AWS now spans 69 Availability Zones within 22 geographic regions around the world, and has announced plans for thirteen more Availability Zones and four more AWS Regions in Indonesia, Italy, South Africa, and Spain.

Key Metrics below :
  1. 22 Launched Regions
  2. 4 Announced Regions
  3. 69 Availability Zones
  4. 1 Local Zone
  5. 245 Countries and Territories Served
  6. 97 Direct Connect Locations
  7. 210 Points of Presence

    • 199 Edge Locations and 11 Regional Edge Caches
AWS Global Infrastructure – 4 Jan 2020

For latest AWS Gobal Infrastructure – Refer https://aws.amazon.com/about-aws/global-infrastructure/

What is cloud computing ?

What is cloud computing ?
Cloud computing is offering IT infrastructure services to businesses in form of web services.
Cloud computing is on demand delivery of IT resources and applications via internet with pay as you use pricing.
 Key benefits of cloud computing :
Replace business up front capital infrastructure expenses with low variable costs
Business need not plan and procure servers or IT infrastructure weeks or months in advance. They can instantly spin up servers in minutes

Cloud computing providers Amazon AWS, Microsoft Azure and Google Cloud