# Day 10:AWS Storage

## Types of Storage Services

### Elastic Block Store (EBS) - Block Storage

* **Block Storage**: Data is divided into fixed-size blocks, which the operating system directly manages.
    
* **Usage**: Ideal for virtual hard drives attached to EC2 instances.
    
* **Characteristics**:
    
    * Single write volume support.
        
    * Operated by the operating system.
        
    * Suitable for applications requiring a virtual hard drive with performance consistency.
        

### AWS Elastic File Storage (EFS) - File Storage

* **File Storage**: Data is stored with metadata in a hierarchical file system structure.
    
* **Usage**: Perfect for file sharing where multiple users or VMs need concurrent access.
    
* **Characteristics**:
    
    * Supports multiple connections via a network share.
        
    * Multiple reads and file locks during writes.
        
    * Ideal for applications needing shared access to files.
        

### Amazon Simple Storage Service (S3) - Object Storage

* **Object Storage**: Data is managed as objects, each with a unique ID and associated metadata.
    
* **Usage**: Best for storing files without worrying about infrastructure details.
    
* **Characteristics**:
    
    * Scales indefinitely with no file or storage limits.
        
    * Supports multiple reads and writes without locking.
        
    * Not designed for high IOPS (Input/Output Operations Per Second).
        

## Introduction to S3 (Simple Storage Service)

S3 is an object-based storage service that offers unlimited storage. Unlike file and block storage, S3 organizes data as objects rather than files or blocks. Key components include:

* **S3 Buckets**: Containers that hold objects. Each bucket name must be unique across the entire S3 namespace.
    
* **Objects**: Consist of:
    
    * **Key**: The name of the object.
        
    * **Value**: The data itself.
        
    * **Version ID**: Identifies different versions of the same object (if versioning is enabled).
        
    * **Metadata**: Additional information about the object.
        

## S3 Storage Classes

AWS provides various S3 storage classes, each balancing cost, retrieval time, and durability:

* **S3 Standard**: Default class with high availability (99.99%) and durability (11 nines). Replicated across multiple Availability Zones (AZs).
    
* **S3 Intelligent-Tiering**: Uses machine learning to move data between access tiers based on usage patterns.
    
* **S3 Standard-IA (Infrequent Access)**: Cheaper for less frequently accessed data. Additional retrieval fees apply.
    
* **S3 One-Zone-IA**: Lower cost for data stored in a single AZ. Suitable for non-critical data.
    
* **S3 Glacier**: For long-term cold storage with retrieval times from minutes to hours. Cost-effective for archival data.
    
* **S3 Glacier Deep Archive**: Lowest-cost option for data that is rarely accessed, with retrieval times of up to 12 hours.
    

## AWS Snow Family

The AWS Snow Family provides physical devices to move data in and out of the cloud when internet transfer is impractical:

* **Snowcone**: A small device with 8TB of storage, ideal for edge locations or small data transfers.
    
* **Snowball Edge**: Available in two versions:
    
    * **Storage Optimized**: 80TB of storage.
        
    * **Compute Optimized**: 39.5TB of storage with additional compute capabilities.
        
* **Snowmobile**: A massive 100PB storage and compute container transported by semi-trailer for large-scale data migrations.
    

## Additional Storage Services

* **AWS Storage Gateway**: Hybrid cloud storage service that extends on-premises storage to AWS:
    
    * **File Gateway**: Connects local storage to AWS S3.
        
    * **Volume Gateway**: Caches local drives to S3, providing continuous backup.
        
    * **Tape Gateway**: Uses virtual tapes for cost-effective long-term storage.
        
* **AWS Backup**: A fully managed service to centralize and automate backups across AWS services like EC2, EBS, RDS, DynamoDB, and EFS.
    
* **CloudEndure Disaster Recovery**: Provides continuous replication of your machines to a staging area in AWS, enabling fast recovery from data center failures.
    
* **Amazon FSx**: Provides feature-rich file systems:
    
    * **Amazon FSx for Windows File Server**: Supports SMB protocol for Windows server integration.
        
    * **Amazon FSx for Lustre**: Uses Lustre file system for high-performance computing on Linux servers.
        

## Conclusion

AWS offers a diverse range of storage services to meet various needs, from high-performance block storage to cost-effective archival solutions. Understanding these services and their use cases will help you choose the right storage solution for your applications and data requirements.