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Storage Services

Notes about AWS Storage Services​

storage_services

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You can download these notes as pdf from here.

1. Amazon S3 (Simple Storage Service)​

  • Object Storage: Scalable, high-speed, web-based cloud storage service for storing and retrieving any amount of data.
  • Buckets: Containers for objects. Each bucket has a unique name globally.
  • Objects: Consist of data, metadata, and a unique identifier.
  • Storage Classes: Different classes for varying needs (Standard, Intelligent-Tiering, Standard-IA, One Zone-IA, Glacier, Glacier Deep Archive).
  • Versioning: Keep multiple versions of an object to protect against accidental deletions or overwrites.
  • Lifecycle Policies: Automate the transition of objects between storage classes and define when objects should be deleted.
  • Encryption: Server-side encryption (SSE-S3, SSE-KMS, SSE-C) and client-side encryption.
  • Access Control: Bucket policies, ACLs, IAM policies, and pre-signed URLs for fine-grained access control.
  • Replication: Cross-Region Replication (CRR) and Same-Region Replication (SRR) for disaster recovery and data locality.

2. Amazon EBS (Elastic Block Store)​

  • Block Storage: Persistent block-level storage for use with Amazon EC2 instances.
  • Volume Types: Different types for various performance and cost needs (General Purpose SSD (gp2/gp3), Provisioned IOPS SSD (io1/io2), Throughput Optimized HDD (st1), Cold HDD (sc1)).
  • Snapshots: Point-in-time backups of EBS volumes stored in S3.
  • Encryption: Data at rest encryption using AWS KMS.

3. Amazon EFS (Elastic File System)​

  • File Storage: Managed file storage that can be mounted on multiple EC2 instances.
  • Scalability: Automatically scales as files are added or removed.
  • Performance Modes: General Purpose and Max I/O.
  • Storage Classes: Standard and Infrequent Access.
  • Encryption: Supports encryption of data at rest and in transit.

4. Amazon S3 Glacier and S3 Glacier Deep Archive​

  • Archival Storage: Low-cost storage for long-term data archiving.
  • Access Times: S3 Glacier (expedited, standard, and bulk retrievals) and S3 Glacier Deep Archive (standard and bulk retrievals).
  • Vaults and Archives: Store archives in vaults, which are containers in S3 Glacier.

Key Concepts and Best Practices​

  • Durability and Availability: S3 provides 99.999999999% durability and 99.99% availability.
  • Cost Management: Choose appropriate storage classes and use lifecycle policies to manage costs.
  • Data Protection: Use versioning, cross-region replication, and encryption to protect data.
  • Performance Optimization: Select the right storage type (e.g., EBS, EFS, S3) based on workload requirements.
  • Security: Implement proper access controls and encryption to secure data.
  • Monitoring and Logging: Use CloudWatch and S3 access logs to monitor and analyze storage usage.
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