Wed. Feb 21st, 2024

As software systems scale in complexity, architects must decide whether a monolithic or microservices architecture is the best choice. This decision greatly impacts system scalability, fault tolerance, ease of development, and more for years to come.

1. Monolithic ArchitectureMonolithic vs Microservices Architecture

In a monolithic design, all critical application components are combined into a single, tightly integrated unit. The components are heavily dependent on each other and communicate via language-level interfaces. The entire software system scales and is deployed as one. Performance can be greatly optimized via shared state and function calls between components. The data model is enforced in a single database.

2. Microservices ArchitectureMonolithic vs Microservices Architecture

The software is split into multiple smaller independent services in a microservices architecture. Each service contains the logic and data to handle specific capabilities. The services run their own processes and communicate via APIs. The services can be developed, tested, deployed, and scaled independently allowing for greater flexibility at the cost of higher network reliability requirements and added complexity of data consistency.

Monorepos vs Microrepos: Which is better?
Find out why companies choose Monorepos over Microrepos strategies and how they impact scalability, governance, and code quality.
Monolithic vs Microservices Architecture

3. Example: A Social Media Platform → Monolithic

With a monolithic architecture, the various social media functions would be developed together as components of the same system, using the same languages and frameworks. The components would be deployed as a single unit, with all data in the same databases.

→ Microservices

In a microservices model, each social media function becomes a standalone service, owning its own logic and databases. Services scale independently from each other allowing optimization. An API Gateway sits in front handling routing across services. Tradeoffs exist due to added latency between services and the complexity of data replication.

What Makes Load Balancer vs. API Gateway Different and Use Cases ?
Discover the key distinctions between Load Balancer and API Gateway, along with their unique use cases like efficient traffic distribution & integration.
Monolithic vs Microservices Architecture

4. What are the Architectural Tradeoffs?

Architecture
✅ Pros
❌ Cons

Monolithic
– Development Speed – Performance Optimizations – Data Consistency
– Massive Codebase Complexity – Lack of Independent Scalability

Microservices
– Independent Scaling and Deployment – Fault Isolation – Technology Flexibility
– Higher Operational Complexity – Data Consistency Challenges

5. What Works Best Monolithic or Microservices?

Suppose, a small company may be developing a new web application to support customer surveys and analytics. There is a single development team and the planned scalability needs are fairly basic for the initial product. Here are factors that would make a monolithic architecture suitable:

For small startup companies, faster and simpler development with fewer developers is critical. Microservices add complexity unneeded at their size.The core components (UI, business logic, database) can scale together linearly. No need to decouple scaling needs yet.Tight coupling between survey input, analysis, and reporting features actually improves the product experience.

However, if the application becomes very successful and usage grows 10x, a switch to microservices could then occur to allow independent scaling since the monolith may no longer fit scalability needs:

Scale the survey collection capability separately from analysis features.Runtime traffic spikes on analytical features won’t impact data collection consistency, and vice versa.Replace the UI framework without rewriting the entire app if needed.Onboard more developers by dividing the workload across services.When Monolithic Works Well?

Monolithic architectures allow for rapid development cycles which can enable faster innovation. If future scale is limited and teams are small, monolithic provides benefits. It works well for linear scalability needs and simpler applications where rapid reliable communication between components is required.

When Microservices Excel?

For large enterprise systems that need to operate reliably at a massive scale, microservices ease the burden. Independent deployment eases change management burdens. If technology flexibility is desired per component and complex data replication needs are met, microservices can excel.

DevOps vs SRE vs Platform Engineering – Explained
At small companies, engineers often wear multiple hats, juggling a mix of responsibilities. Large companies have specialized teams with clearly defined roles in DevOps, SRE, and Platform Engineering.
Monolithic vs Microservices Architecture
How Do (LLM) Large Language Models Work? Explained
A large language model (LLM) is an AI system trained on extensive text data, designed to produce human-like and intelligent responses.
Monolithic vs Microservices Architecture

Leave a Reply

Your email address will not be published. Required fields are marked *