Compute In The Cloud Flashcards
What does an EC2 run on top of?
Physical host machines managed by AWS using virtualization technology.
What is multitenancy?
The idea of sharing underlying hardware on a server.
What 2 operating systems can you create EC2 instances of?
-Windows
-Linux
What are 5 different instance families in EC2?
-general purpose
-compute optimized
-memory optimized
-accelerated computing
-storage optimized
What are Compute Optimized Instances ideal for?
-gaming servers,
-high performance computing or HPC
-scientific modeling.
What are General Purpose Instances ideal for?
provide a good balance of compute, memory, and networking resources, and can be used for a variety of diverse workloads like web service or code repositories.
What are Memory Optimized Instances ideal for?
good for memory-intensive tasks.
What are Accelerated Computing Instances ideal for?
good for floating point number calculations, graphics processing, or data pattern matching, as they use hardware accelerators.
What are Storage Optimized Instances ideal for?
Workloads that require high performance for locally stored data.
Which Amazon EC2 instance type is suitable for data warehousing applications?
Storage Optimized
Which Amazon EC2 instance type balances compute, memory, and networking resources?
General Purpose
Which Amazon EC2 instance type is ideal for high-performance databases?
Memory Optimized
Which Amazon EC2 instance type offers high-performance processors?
Compute Optimized
What are the 5 Amazon EC2 pricing options?
-On Demand
-Reserved Instances
-EC2 Instance Savings Plan
-Spot Instances
-Dedicated Hosts
What are On Demand Instances Ideal for?
short-term, irregular workloads that cannot be interrupted
**not recommended for workloads that last a year or longer.
What are Standard Reserve Instances Ideal for?
you know the EC2 instance type and size you need for your steady-state applications and in which AWS Region you plan to run them.
What are EC2 Instance Savings Plans Ideal for?
flexibility in your EC2 usage over the duration of the commitment term
What are Spot Instances Ideal for?
workloads with flexible start and end times, or that can withstand interruptions.
What are Convertible Reserved Instances Ideal for?
you need to run your EC2 instances in different Availability Zones or different instance types
What are Reserved Instances?
a billing discount for On-Demand Instances
What are the 2 available types of Reserved Instances?
-Standard Reserved Instances
-Convertible Reserved Instances
What terms can you purchase Standard Reserved and Convertible Reserved Instances for?
1-year or 3-year term
Reserved Instances require you to state what 3 qualifications?
-Instance type and size: For example, m5.xlarge
-Platform description (operating system): For example, Microsoft Windows Server or Red Hat Enterprise Linux
-Tenancy: Default tenancy or dedicated tenancy
You have the option to specify WHAT for your EC2 Reserved Instances?
Availability Zone
At the end of a Reserved Instance term, you can continue using the Amazon EC2 instance without interruption. However, you are charged On-Demand rates until you do one of the following:
-Terminate the instance.
-Purchase a new Reserved Instance that matches the instance attributes (instance family and size, Region, platform, and tenancy).
What are EC2 Instance Savings Plans?
Hourly spend commitment to an instance family and Region
-1-year or 3-year term
What do you not need to specify with the EC2 Instance Savings Plans?
-specify what EC2 instance type and size
-commit to a certain number of EC2 instances over a 1-year or 3-year term
**EC2 Instance Savings Plans don’t include an EC2 capacity reservation option.
What are Dedicated Hosts?
physical servers with Amazon EC2 instance capacity that is fully dedicated to your use.
What is Amazon EC2 Auto Scaling
A service that automatically adds or removes Amazon EC2 instances in response to changing application demand.
Within Amazon EC2 Auto Scaling, you can use what 2 approaches
-Dynamic scaling responds to changing demand.
-Predictive scaling automatically schedules the right number of Amazon EC2 instances based on predicted demand
an Auto Scaling group sets what?
set the minimum number of Amazon EC2 instances.
What is Minimum Capacity?
the number of Amazon EC2 instances that launch immediately after you have created the Auto Scaling group
What is Desired Capacity?
The overall capacity needed
What occurs if you do not specify the desired number of Amazon EC2 instances in an Auto Scaling group?
The desired capacity defaults to your minimum capacity.
What is the Maximum Capacity?
The maximum number of Amazon EC2 instances
What is Elastic Load Balancing?
AWS service that automatically distributes incoming application traffic across multiple resources
What is Amazon Simple Notification Service (Amazon SNS)
a publish/subscribe service. Using Amazon SNS topics, a publisher publishes messages to subscribers.
What is Amazon Simple Queue Service (Amazon SQS)
a message queuing service.
What does the term “Serverless” mean?
your code runs on servers, but you do not need to provision or manage these servers
What is AWS Lambda
a service that lets you run code without needing to provision or manage servers.
What are Containers?
a standard way to package your application’s code and dependencies into a single object. You can also use containers for processes and workflows in which there are essential requirements for security, reliability, and scalability.
What is Amazon Elastic Container Service (Amazon ECS)
a highly scalable, high-performance container management system that enables you to run and scale containerized applications on AWS.
What is Docker?
a software platform that enables you to build, test, and deploy applications quickly.
What is Amazon Elastic Kubernetes Service (Amazon EKS)
a fully managed service that you can use to run Kubernetes on AWS.
What is Kubernetes
open-source software that enables you to deploy and manage containerized applications at scale.
What is AWS Fargate
a serverless compute engine for containers.
**It works with both Amazon ECS and Amazon EKS.
