Step 4: Individual Component Resilience

Imagine a chain where every link is strong individually. Even if one link has issues, the chain doesn't completely break.

Your system components need the same individual resilience:

Scalability Questions:

• "What if 1 million users hit my web server?"
• "How does my database handle millions of feeds?"
• "Can my aggregator process feeds for millions of users in parallel?"

Fault Tolerance Questions:

• "What if my web server crashes?"
• "What if my database goes down?"
• "What if the aggregator service fails?"

✅ Availability Questions:

• "Is there any single point of failure?"
• "If one component dies, does the entire system go down?"
• "How quickly can we recover from failures?"

Golden Rule: No component should be a single point of failure.

Pro Tip: A system is only as strong as its weakest component - make sure none are weak.