AWS Storage & Databases
| storage service | features |
|---|---|
| AWS Storage & Databases#Amazon Elastic Block Store (Amazon EBS) | Block-level storage for EC2 instances that persists data even after termination |
| AWS Storage & Databases#Amazon Simple Storage Service (Amazon S3) | Object-level storage that can be accessed from anywhere on the web |
| AWS Storage & Databases#Amazon Elastic File System (Amazon EFS) | Fully managed file storage for EC2 instances that allows simultaneous access from multiple instances |
| AWS Storage & Databases#Amazon Relational Database Service (Amazon RDS) | - |
Important
Object storage vs. Block storage
- Object storage treats any file as a complete, discreet object.
- Block storage breaks files down to small component parts or blocks for complex reading, writing, changing functions.
Amazon Elastic Block Store (Amazon EBS)
Because an instance store provides only temporary block-level storage for an Amazon EC2 instance, we need storage services that can persist data after EC2 termination.
- block-level storage for EC2 instances that persists data even after termination
- need to define configuration
- need to take incremental backups using Amazon EBS snapshots
- incremental = only the data that have changed since the most recent snapshot is backed up
- incremental = only the data that have changed since the most recent snapshot is backed up
Amazon Simple Storage Service (Amazon S3)
- object-level storage that stores data as objects in buckets
- data can be accessed with an object key along with the bucket name
- unlimited storage space, with the maximum file size for an object as 5 TB
- web enabled
- perfect foundation for Data Lake (Data Warehouse & Data Lake)
- can choose from a range of storage classes:
| Amazon S3 class | features | costs |
|---|---|---|
| Amazon S3 Standard | for frequently accessed data; stores data in >= three Availability Zones | - |
| Amazon S3 Standard-Infrequent Access (S3 Standard-IA) | for infrequently accessed data | similar to Amazon S3 Standard but has a lower storage price and higher retrieval price |
| Amazon S3 One Zone-Infrequent Access (S3 One Zone-IA) | stores data in a single availability zone | lower storage price than Amazon S3 Standard-IA |
| Amazon S3 Intelligent-Tiering | for data with unknown or changing access patterns | a small monthly monitoring and automation fee per object |
| Amazon S3 Glacier Instant Retrieval | for archived data that requires immediate access; can retrieve objects within a few milliseconds | - |
| Amazon S3 Glacier Flexible Retrieval | for archived data; can retrieve objects within a few minutes to hours | low-cost storage class for data archiving |
| Amazon S3 Glacier Deep Archive | for archived data; can retrieve objects within 12 hours | lowest-cost object storage class ideal for archiving |
| Amazon S3 Outposts | creates S3 buckets on Amazon S3 Outposts for retrieving, storing, accessing | - |
Amazon Elastic File System (Amazon EFS)
- a scalable file system used with AWS Cloud services and on-premises resources
- regional resource
- Linux file system
![Important] Amazon EBS vs. EFS
EBS EFS stores data in a single AWS Global infrastructure & Networking#Availability zone stores data in multiple AWS Global infrastructure & Networking#Availability zone
Amazon Relational Database Service (Amazon RDS)
- enables to run relational databases in the AWS Cloud
- provides services: automated patching, backups, redundancy, failover, disaster recovery
- Amazon RDS database engines
- Amazon Aurora
- an enterprise-class relational database
- compatible with MySQL and PostgreSQL
- faster than standard MySQL and PostgreSQL databases
- PostgreSQL
- MySQL
- MariaDB
- Oracle Database
- Microsoft SQL Server
- Amazon Aurora
Amazon DynamoDB
- key-value and document non-relational database (NoSQL)
- features
- Serverless
- you do not have to provision, patch, or manage severs
- you do not have to install, maintain, or operate software
- Automatic scaling: AWS All-in-one#^c7080d
- highly scalable
- ms
- Serverless
Amazon Neptune
- graph database service
Amazon Redshift
- a data warehousing service for big data analytics
- offers the ability to collect data from many sources
AWS Database Migration Service
- enables migrating relational databases, nonrelational databases, and other types of data stores
- move data between a source database and a target database
Additional database services
| service | usage |
|---|---|
| Amazon DocumentDB | document database service |
| Amazon Neptune | graph database service |
| Amazon Quantum Ledger Database (Amazon QLDB) | ledger database service |
| Amazon Managed Blockchain | create and manage blockchain networks with open-source frameworks |
| Amazon ElastiCache | add caching layers on top of databases to help improve the read times of common requests |
| Amazon DynamoDB Accelerator (DAX) | in-memory cache for DynamoDB |