Bird
Raised Fist0
HLDsystem_design~12 mins

Inventory management in HLD - Architecture Diagram

Choose your learning style9 modes available
LearnWhyDeepArchPracticeChallengeDesignRecallScale
System Overview - Inventory management

This system helps businesses keep track of their products and stock levels. It allows users to add, update, and check inventory items quickly and reliably. The system must handle many users and keep data accurate and up-to-date.

Architecture Diagram
User
  |
  v
Load Balancer
  |
  v
API Gateway
  |
  v
Inventory Service
  |
  +-----> Cache
  |
  v
Database
Components
User
client
Person or system interacting with the inventory system
Load Balancer
load_balancer
Distributes incoming user requests evenly to prevent overload
API Gateway
api_gateway
Handles request routing, authentication, and rate limiting
Inventory Service
service
Processes inventory operations like add, update, and query
Cache
cache
Stores frequently accessed inventory data for faster reads
Database
database
Stores all inventory data persistently and reliably
Request Flow - 11 Hops
User → Load Balancer
Load Balancer → API Gateway
API Gateway → Inventory Service
Inventory Service → Cache
Cache → Inventory Service
Inventory Service → Database
Database → Inventory Service
Inventory Service → Cache
Inventory Service → API Gateway
API Gateway → Load Balancer
Load Balancer → User
Failure Scenario
Component Fails:Database
Impact:New writes to inventory fail; reads may still succeed if data is cached
Mitigation:Use database replication for failover; rely on cache for read requests temporarily
Architecture Quiz - 3 Questions
Test your understanding
Which component handles user authentication before processing inventory requests?
AAPI Gateway
BLoad Balancer
CCache
DInventory Service
Design Principle
This design uses a layered approach with caching to improve read performance and a load balancer to distribute traffic evenly. The API Gateway centralizes security and routing, ensuring scalability and maintainability.