Task Statement 3.1: Determine high-performing and/or scalable storage solutions.
📘AWS Certified Solutions Architect – (SAA-C03)
🔷 1. What Does “Scalable Storage” Mean?
Scalability means a storage system can:
- Handle increasing data size
- Support more users and requests
- Maintain performance under heavy load
- Grow without major redesign
👉 In AWS, scalability is usually:
- Automatic (managed by AWS)
- Elastic (scale up and down as needed)
🔷 2. Types of Scaling in AWS Storage
✅ 1. Vertical Scaling (Scale Up)
- Increase size/capacity of a single resource
- Example: Increase disk size or IOPS
✔ Used in:
- Block storage (EBS)
❗ Limitation:
- Has a maximum limit
✅ 2. Horizontal Scaling (Scale Out)
- Add more resources instead of increasing one
- Example: Add more storage nodes automatically
✔ Used in:
- Object storage (S3)
- File storage (EFS)
✔ This is preferred in AWS
🔷 3. AWS Storage Services and Their Scalability
🟢 1. Amazon S3 (Object Storage)
✔ Scalability Level: Unlimited (Virtually)
Key Points:
- Automatically scales to billions of objects
- No need to provision storage
- Handles high request rates automatically
- Data is distributed across multiple servers
Performance Scaling:
- Supports thousands of requests per second
- No need to manage partitions (AWS handles it)
Best Use:
- Large-scale data storage
- Static files, backups, logs, analytics data
🔑 Exam Tips:
- Default choice for scalable storage
- No capacity planning needed
- Best for unpredictable growth
🟢 2. Amazon EBS (Elastic Block Store)
✔ Scalability Level: Limited (Per Volume)
Key Points:
- Attached to EC2 instances
- You can:
- Increase volume size
- Change volume type
- Increase IOPS
Limitations:
- Cannot scale infinitely
- Bound to a single Availability Zone
- Must manually modify for scaling
🔑 Exam Tips:
- Use when you need high-performance disk for EC2
- Not ideal for massive scaling
- Good for databases and OS disks
🟢 3. Amazon EFS (Elastic File System)
✔ Scalability Level: Automatic and Elastic
Key Points:
- Automatically scales storage up and down
- No provisioning required
- Supports multiple EC2 instances at the same time
Performance Scaling:
- Throughput increases as storage grows
- Can handle thousands of concurrent connections
🔑 Exam Tips:
- Best for shared file systems
- Fully managed and scalable
- Good for applications needing shared access
🟢 4. Amazon FSx (Managed File Systems)
✔ Scalability Level: Depends on Type
Types:
- FSx for Windows File Server
- FSx for Lustre
- FSx for NetApp ONTAP
- FSx for OpenZFS
Key Points:
- Scaling depends on configuration
- Some require manual scaling
- High-performance workloads
🔑 Exam Tips:
- Used when specific file system features are needed
- Not as flexible as EFS for scaling
🟢 5. AWS Storage Gateway (Hybrid)
✔ Scalability Level: Uses S3 Scaling
Key Points:
- On-premises + AWS integration
- Stores data in S3 (scalable backend)
🔑 Exam Tips:
- Scales because S3 scales
- Used for hybrid environments
🔷 4. Key Factors to Choose Scalable Storage
In the exam, always think about:
✅ 1. Data Growth Rate
- Fast-growing → Use S3 or EFS
- Predictable → EBS may work
✅ 2. Access Pattern
- High concurrent access → EFS or S3
- Single instance access → EBS
✅ 3. Performance Needs
- High IOPS → EBS
- Distributed access → EFS or S3
✅ 4. Management Overhead
- Want zero management → S3, EFS
- Can manage manually → EBS
✅ 5. Multi-Instance Access
- Needed → EFS
- Not needed → EBS
🔷 5. Comparing Scalability (Very Important for Exam)
| Service | Scalability | Type of Scaling | Best Use |
|---|---|---|---|
| S3 | Unlimited | Horizontal | Large-scale storage |
| EBS | Limited | Vertical | EC2 disks |
| EFS | Automatic | Horizontal | Shared file system |
| FSx | Moderate | Depends | Specialized workloads |
| Storage Gateway | High (via S3) | Horizontal | Hybrid storage |
🔷 6. Common Exam Scenarios
✅ Scenario 1:
Application data is growing very fast and unpredictable
✔ Answer: S3
👉 Because it scales automatically without limits
✅ Scenario 2:
Multiple EC2 instances need shared access to files
✔ Answer: EFS
👉 Because it scales and supports concurrent access
✅ Scenario 3:
High-performance database on a single EC2
✔ Answer: EBS
👉 Because it provides high IOPS (but limited scaling)
✅ Scenario 4:
On-premises system needs scalable cloud backup
✔ Answer: Storage Gateway + S3
👉 Because S3 handles scaling
🔷 7. Important Design Principles
For the exam, remember these:
✅ 1. Prefer Managed Services
- S3 and EFS scale automatically
- Less operational effort
✅ 2. Avoid Manual Scaling When Possible
- EBS requires manual resizing
- S3/EFS do not
✅ 3. Design for Future Growth
- Choose services that grow without redesign
- Avoid tight limits
✅ 4. Decouple Storage from Compute
- Use S3/EFS instead of instance storage
- Allows independent scaling
🔷 8. Quick Memory Tricks
- S3 = Infinite storage
- EFS = Shared + auto-scale
- EBS = Fast but limited
- FSx = Specialized
- Storage Gateway = Hybrid + S3 scaling
🔷 Final Exam Strategy
When you see a question, ask:
- Does data grow very large or unpredictably? → S3
- Do many servers need access? → EFS
- Is it tied to one server? → EBS
- Is it hybrid? → Storage Gateway
- Is special file system needed? → FSx
✔ If you remember these rules, you can answer most exam questions correctly.
