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AWS Cloud Practitioner > Compute Services > Flashcards

Compute Services Flashcards

1
Q

AWS Batch

A
  • AWS Batch enables developers, scientists, and engineers to easily and efficiently run hundreds of thousands of batch computing jobs on AWS
  • AWS Batch dynamically provisions the optimal quantity and type of compute resources
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2
Q

Amazon LightSail

A
  • Amazon Lightsail is great for users who do not have deep AWS technical expertise as it make it very easy to provision compute services
  • Amazon Lightsail provides compute, storage, and networking capacity and capabilities to deploy and manage websites, web
    applications, and databases in the cloud
  • Best suited to projects that require a few dozen instances or fewer
  • Provides a simple management interface
  • Good for blogs, websites, web applications, e-commerce etc.
  • Can deploy load balancers and attach block storage
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3
Q

Amazon Elastic Container Service (ECS)

A
  • ECS is used for running Docker containers in the cloud
  • ECS containers are known as tasks
  • EC2 launch type:
  • You managed EC2 instances which are the hosts for running the
    tasks
  • Fargate launch type:
  • AWS manage the underlying compute, cluster, and scaling
  • Amazon Elastic Container Registry (ECR) is a private
    container image registry
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4
Q

Amazon Route 53

A

*Route 53 is the AWS Domain Name Service
* Route 53 performs three main functions:
* Domain registration – Route 53 allows you to register domain
names
* Domain Name Service (DNS) – Route 53 translates name to IP
addresses using a global network of authoritative DNS servers
* Health checking – Route 53 sends automated requests to your
application to verify that it’s reachable, available and functional

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5
Q

Amazon Route 53 Routing Policies

A
  • Simple – IP address associated with name
  • Failover – if primary is down, route to secondary
  • Geolocation – route based on geographic location of request
  • Geoproximity – route to closes Region withing geo area
  • Latency – use lowest latency route to resources
  • Multivalue answer – returns several IP addresses
  • Weighted – relative weights (e.g. 80%/20%)
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6
Q

Amazon EC2 Auto Scaling

A
  • Automates scaling of EC2 instances to handle the application load
  • Launches and terminates EC2 instances based on demand
  • You create collections of EC2 instances, called an Auto
    Scaling group (ASG)
    *Responds to EC2 status checks and CloudWatch metrics
    *Can scale based on demand (performance) or on a schedule
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7
Q

Scaling policies

A

define how to respond to changes in demand
* Scaling policies include:
* Target Tracking – Attempts to keep the group at or close to the
metric
* Simple Scaling – Adjust group size based on a metric
* Step Scaling – Adjust group size based on a metric – adjustments
vary based on the size of the alarm breach
* Scheduled Scaling – Adjust the group size at a specific time

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8
Q

Amazon Elastic Load Balancing

A
  • ELB automatically distributes incoming application traffic
    across multiple targets, such as Amazon EC2 instances,
    containers, and IP addresses
  • ELB can handle the varying load of your application traffic in
    a single Availability Zone or across multiple Availability Zones
  • ELB features high availability, automatic scaling, and robust
    security necessary to make your applications fault tolerant
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9
Q

types of Elastic Load Balancer (ELB)

A

There are two types of Elastic Load Balancer (ELB) that may
feature on the exam:
* Application Load Balancer (ALB) – layer 7 load balancer that
routes connections based on the content of the request
* Network Load Balancer (NLB) – layer 4 load balancer that
routes connections based on IP protocol data

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10
Q

Serverless

A
  • With serverless there are no instances to manage
  • You don’t need to provision hardware
  • There is no management of operating systems or software
  • Capacity provisioning and patching is handled automatically
  • Provides automatic scaling and high availability
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11
Q

Name AWS Serverless services?

A

Serverless services include:
* AWS Lambda
* AWS Fargate
* Amazon EventBridge
* AWS Step Functions
* Amazon SQS
* Amazon SNS
* Amazon API Gateway
* Amazon S3
* Amazon DynamoDB

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12
Q

AWS Lambda Functions

A
  • AWS Lambda executes code only when needed and scales
    automatically
  • You pay only for the compute time you consume (you pay
    nothing when your code is not running)
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13
Q

Benefits of AWS Lambda:

A
  • No servers to manage
  • Continuous scaling
  • Millisecond billing
  • Integrates with almost all other AWS services
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14
Q

Amazon Simple Queue Service (SQS)

A
  • SQS offers a reliable, highly-scalable, hosted queue for
    storing messages in transit between computers
  • SQS is used for distributed/decoupled applications
  • SQS uses a message-oriented API
  • SQS uses pull based (polling) not push based
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15
Q

Amazon MQ

A
  • Message broker service
  • Similar to Amazon SQS
  • Based on Apache Active MQ and RabbitMQ
  • Used when customers require industry standard APIs and
    protocols
  • Useful when migrating existing queue-based applications
    into the cloud
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16
Q

Amazon Simple Notification Service (SNS)

A
  • Publisher / subscriber model
  • Amazon SNS is used for building and integrating looselycoupled, distributed applications
  • Provides instantaneous, push-based delivery (no polling)
  • Uses simple APIs and easy integration with applications
  • Offered under an inexpensive, pay-as-you-go model with no
    up-front costs
17
Q

AWS Step Functions

A
  • AWS Step Functions makes it easy to coordinate the
    components of distributed applications as a series of steps in
    a visual workflow
  • You can quickly build and run state machines to execute the
    steps of your application in a reliable and scalable fashion
18
Q

Amazon Simple Workflow Service (SWF)

A
  • Coordinate work across distributed application components
  • Create distributed asynchronous systems as workflows
  • Best suited for human-enabled workflows like an order
    fulfilment system or for procedural requests
  • AWS recommends that for new applications customers
    consider Step Functions instead of SWF
19
Q

Amazon EventBridge

A
  • Serverless event bus
  • Used for building event-driven architectures
  • Ingests data and routes it to target AWS services
20
Q

Amazon API Gateway

A
  • Publish APIs on AWS
  • Create RESTful and WebSocket APIs
  • Fully managed service
  • Forward connections to AWS services and on-premises
    applications

AWS Cloud Practitioner (7 decks)

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