AWS
AWS Overview
What is AWS? Amazon Web Services(AWS), Inc. is a subsidiary of Amazon that provides on-demand cloud computing platforms and APIs to individuals, companies, and governments, on a metered, pay-as-you-go basis. Why AWS? Well, to answer this question, let’s have a look at some statistics: AWS alone owns around 40 percent[...]
AWS Basic Commands
Connect to instance 1st approach (For MAC/Linux Laptops) Copy the private key to Desktop Other Steps: cd ~/Desktop chmod 400 ec2-key.pem ssh -i ec2-key.pem ec2-user@PUBLIC-IP-OF-EC2 2nd approach (For Windows but can work for MAC/Linux as well) open . Copy the private key to the folder that opens. Remaining Steps: chmod[...]
Amazon Lightsail
Amazon Lightsail is designed to be the easiest way to launch and manage a virtual private server with AWS. Lightsail plans include everything you need to jumpstart your project – a virtual machine, SSD- based storage, data transfer, DNS management, and a static IP address – for a low, predictable[...]
AWS: Cloud Integrations and Cloud Monitoring
Q: Which service is a fully managed pub/sub messaging service that makes it easy to set up, operate, and send notifications from the cloud, using a push-based system? Simple Notification Service (SNS) (Amazon Simple Notification Service (SNS) is a highly available, durable, secure, fully managed pub/sub messaging service that enables[...]
AWS: Deployments and Managing Infrastructure at Scale
CloudFormation and Elastic Beanstalk are free of use. True (CloudFormation and Elastic Beanstalk are free of use, but you do pay for the resources created.) You need to use Chef or Puppet. Which AWS service should you use? OpsWorks (AWS OpsWorks is a configuration management service that provides managed instances[...]
AWS: Other Compute Services
How do you get charged in AWS Lambda? Per call and per duration (In AWS Lambda, you are charged per request and compute time, that's it.) A complete cloud beginner would like to create a simple application with predictable pricing. What service should this person use? Lightsail What is the[...]
AWS: Databases and Analytics
Which in-memory AWS database can you use to reduce the load off databases and has high performance, low latency? ElastiCache (Amazon ElastiCache is a web service that makes it easy to deploy and run Memcached or Redis protocol-compliant server nodes in the cloud. ElastiCache caches are in-memory databases with high[...]
AWS: Simple Storage Service (S3)
Which S3 Storage Class is the most cost-effective for archiving data with no retrieval time requirement? Amazon Glacier Deep Archive (Amazon Glacier Deep Archive is the most cost-effective option if you want to archive data and do not have a retrieval time requirement. You can retrieve data in 12 or[...]
AWS: ELB and ASG
Q1. What is the main purpose of High Availability in the Cloud? Application thriving even in case of a disaster (High Availability means applications running at least in two AZs to survive a data center loss.) Q2. AWS offered Load Balancer should you use to handle hundreds of thousands of[...]
EC2 (Amazon Elastic Compute Cloud)
What is an EC2 (Amazon Elastic Compute Cloud)? Amazon Elastic Compute Cloud, EC2 is a web service from Amazon that provides re-sizable compute service in the cloud. What is an Instance? An instance is a virtual server for running application on Amazon's EC2. It can also be understood like a[...]