> For the complete documentation index, see [llms.txt](https://gchandra.gitbook.io/data-warehousing/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://gchandra.gitbook.io/data-warehousing/cloud/aws.md).
# AWS
### Terms to Know
**Elasticity** The ability to acquire resources as you need them and release resources when you no longer need them.
Scale Up vs. Scale Down
Scale-Out vs. Scale In
**Latency**
Typically latency is **a measurement of a round-trip between two systems,** such as how long it takes data to make its way between two.
**Root User**
Owner of the AWS account.
**IAM**
Identity Access Management
**ARN**
Amazon Resource Name
For example
```
arn:aws:iam::123456789012:user/Development/product_1234/*
```
**Policy**
Rules
### AWS Popular Services
**Amazon EC2**
Allows you to deploy virtual servers within your AWS environment.
**Amazon VPC**
An isolated segment of the AWS cloud accessible by your own AWS account.
**Amazon S3**
A fully managed, object-based storage service that is highly available, highly durable, cost-effective, and widely accessible.
**Amazon Elastic Block Store**
Provides storage to your EC2 instances as EBS volumes, which provide persistent and durable block-level storage.
**AWS IAM** (Identify and Access Mgt)
Used to manage permissions to your AWS resources
**Amazon RDS** (Relational Database Service)
### AWS Management Services
**Amazon EC2 Auto Scaling**
Automatically increases or decreases your EC2 resources to meet the demand based on custom-defined metrics and thresholds.
**Amazon CloudWatch**
A comprehensive monitoring tool allows you to monitor your services and applications in the cloud.
**Elastic Load Balancing**
Used to manage and control the flow of inbound requests to a group of targets by distributing these requests evenly across a targeted resource group.
**Billing & Budgeting**
Helps control the cost.