System Design Basic 2 - A single System Example | 10K's

[10kshuaizhang]

https://10kshuaizhang.github.io/post/system-design-basic-2-a-single-system-example/

Scale From Zero To Millions of Users A step by step example Single server setup

User access web throught domain names...

[10kshuaizhang]

Note

1. How the simplest web application data flow?
2. What is relational database and what is non relational database? What are the pros and cons?
3. Scale up vs scale out
4. What is load balance used for?
5. How does master-slave data replication work?
6. What is the advantage of using master-slave replication?
7. How does it improve availability?
8. Cache: temparary storage for expensive response and frequently access data.
9. What is read-through?
10. Considerations when using cache: when to use; expiration policy; consistency with original server; mitigation failures; eviction policies.
11. What is CDN for? It's a cache layer essentially.

[10kshuaizhang]

1. how does CDN work
2. Why use CDN
3. Stateless object
4. Why move stateful object out ?
5. Auto scaling
6. getDNS
7. multiple data centers
8. challenges for multi data center
9. why message queue helpful?
10. Logs/metrics/automations
11. DB scaling
12. sharding
13. challenges of sharding

[10kshuaizhang]

Summary:

• keep web tier stateless - move the stateful things to database server rather than work server
• build redundancy in each tier - replications
• Cache as much as you can
• multiple data center - similar to replications
• CDN
• sharding
• split services into components and connected by the message queue
• log/metrics/trace/monitoring/automation/CICD....