- System Design on AWS - Home
- System Design on AWS - Introduction
- System Design on AWS - Architecture Design
- System Design on AWS - Monolith
- System Design on AWS - Microservices
- System Design on AWS - Load Balancer
- System Design on AWS - Scalability
- System Design on AWS - API Gateways
- System Design on AWS - Security
- System Design on AWS - Monitoring
System Design on AWS - Scalability
Scalability in System Design refers to the ability of the system to scale up or down or adapt changes based on the increasing workloads ensuring efficient distribution of workloads across multiple resources, improving performance and reliability.
Why Need Scalability?
Scalability allows a system to handle more load, traffic, or data without affecting its performance, reliability, or functionality. Here are some key reasons why scalability is essential:
- Handling Increasing traffic: When a system becomes popular, it attracts more users, leading to increased traffic. However, a scalable system can handle this increased traffic without any issues, ensuring it doesn't slow down or crash.
- Meeting Business Demands: Scalability allows a system to adapt to changing business needs. This means it can handle sudden increases in demand or new feature additions without slowing down or stopping.
- Reducing Downtime: A scalable system helps reduce downtime and prevents failures from causing big problems. This means users can access the system and its resources without interruptions.
- Cost-Effective: Scalable systems can handle more work without needing new hardware or infrastructure, which saves money.
Scaling Types
There are two primary types of scaling in AWS system design:
Horizontal Scaling
Horizontal Scaling Also known as scaling out, horizontal scaling involves adding more resources to handle increased load or demand. This can be done by adding more servers or instances. This approach helps to distribute the workload and improve overall performance.
Benefits of Horizontal Scaling
Horizontal scaling, also known as scaling out, offers several benefits in AWS system design:
- Improved System Availability: Horizontal scaling ensures system availability by distributing load across multiple resources and ensuring minimal disruption if one resource fails.
- Increased Scalability: Horizontal scaling increases scalability by adding resources quickly to handle sudden spikes in traffic or demand, ideal for variable workloads.
- Enhanced Redundancy: Horizontal scaling provides built-in redundancy, reducing single-point failures and improving system reliability.
- Flexibility and Adaptability: Horizontal scaling provides flexibility and Adaptability by adding or removing resources as needed, ideal for fluctuating workloads or uncertain growth.
- Easier Maintenance: Horizontal scaling performs maintenance and updates without downtime, improving system maintainability.
Vertical Scaling
Vertical Scaling is also kown as Scaling up. Vertical scaling means making individual resources more powerful to handle more load or demand. This can be done by upgrading to a larger instance type or increasing storage capacity.
Benefits Of Vertical Scaling
Vertical scaling, also known as scaling up, offers several benefits in AWS system design:
- Easy to implement: Vertical Scaling Upgrades individual resources easily, with minimal system changes.
- Less Complex: Vertical scaling is simpler and less complex, with minimal system design changes.
- Faster Deployment: In Vertical scaling Upgrades can be deployed quickly, allowing for rapid response to changing workload demands.
- Cost-Effective: Cost-Effective Solution Upgrading individual resources can be more cost-effective than adding new instances or nodes.
- Improved Performance: Upgrading individual resources improves system performance and responsiveness.