Reading-Notes

Class 17 Summary:

AWS: S3 and Lambda :

Describe “The Cloud” :

• “term used to describe a global network of servers, each with a unique function. The cloud is not a physical entity, but instead is a vast network of remote servers around the globe which are hooked together and meant to operate as a single ecosystem”.

What is a container (as it relates to computers and servers)?

• ” a standard unit of software that packages up code and all its dependencies so the application runs quickly and reliably from one computing environment to another”.

What is auto-scaling?

• “is a cloud computing technique for dynamically allocating computational resources. Depending on the load to a server farm or pool, the number of servers that are active will typically vary automatically as user needs fluctuate”.

What is bandwidth?

• ” is measured as the amount of data that can be transferred from one point to another within a network in a specific amount of time. Typically, bandwidth is expressed as a bitrate and measured in bits per second (bps)”.

How do cloud providers compute service costs?

• ” start by calculating costs for network hardware, network infrastructure maintenance, and labor. These expenses are added together and then divided by the number of rack units a business will need for its IaaS cloud”.

Document the following Vocabulary Terms :

Term
Server Instances	collection of SQL Server databases which are run by a solitary SQL Server service or instance
Containers	a standard unit of software that packages up code and all its dependencies so the application runs quickly and reliably from one computing environment to another
Cloud Services	services available via a remote cloud computing server rather than an on-site server
Cloud Architecture	the way technology components combine to build a cloud, in which resources are pooled through virtualization technology and shared across a network
AWS	amazon web services to build, Deploy, and Manage Websites, Apps or Processes On AWS’ Secure, Reliable Network. Sign Up for a Free Account & Experience AWS’ Secure, Reliable, Scalable Services. No Upfront Commitmen
EC2/Beanstalk vs Heroku	Amazon Elastic Compute Cloud (Amazon EC2) is a web service that provides secure, resizable compute capacity in the cloud. It is designed to make web-scale cloud computing easier for developers. Amazon EC2’s simple web service interface allows you to obtain and configure capacity with minimal friction. It provides you with complete control of your computing resources and lets you run on Amazon’s proven computing environment

AWS S3 :

• “Amazon Simple Storage Service (Amazon S3) is an object storage service that offers industry-leading scalability, data availability, security, and performance. This means customers of all sizes and industries can use it to store and protect any amount of data for a range of use cases, such as data lakes, websites, mobile applications, backup and restore, archive, enterprise applications, IoT devices, and big data analytics. Amazon S3 provides easy-to-use management features so you can organize your data and configure finely-tuned access controls to meet your specific business, organizational, and compliance requirements”.

AWS Lambda :

• “serverless computing service provided by Amazon Web Services (AWS). Users of AWS Lambda create functions, self-contained applications written in one of the supported languages and runtimes, and upload them to AWS Lambda, which executes those functions in an efficient and flexible manner”.

• To complete a Serverless stack we need:

  1. a computing service;
  2. a database service; and
  3. an HTTP gateway service.

AWS Lambda Functions :

1. No servers to manage :AWS Lambda automatically runs your code without requiring you to provision or manage infrastructure.

2. Continuous scaling :AWS Lambda automatically scales your application by running code in response to each event.

3. Cost optimized with millisecond metering :With AWS Lambda, you only pay for the compute time you consume, so you’re never paying for over-provisioned infrastructure.

4. Consistent performance at any scale :With AWS Lambda, you can optimize your code execution time by choosing the right memory size for your function.

CDN :

• Content Delivery Network : “is a geographically distributed group of servers that work together to provide fast delivery of Internet content. A CDN allows for the fast transfer of data needed for loading Internet content including HTML pages, javascript files, stylesheets, images, and videos”.

• Benifites:

  1. Brings consistently great web and video experiences to users anywhere
  2. Provides privacy and data security
  3. Activates with a single click for Cloud Load Balancing users

Sources :

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