Sayan Saha

Behind the systems you use every day.
Backend Engineering | System Design | Distributed Systems
Breaking down how they actually work.

[Sayan Saha @itzsayansaha]

@k_ritij24 Let's connect🙌

[Sayan Saha @itzsayansaha]

Really glad to connect with so many amazing people here! 🙌

If you're into tech, exploring AI, or building something cool, let's connect. 🤝

[Sayan Saha @itzsayansaha]

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@zainramzanx let's connect🙌

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@KolinHuang Yes let's connect🙌

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@Decoded08 Let's connect🙌

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@JaiOnX20 🙌

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[Sayan Saha @itzsayansaha]

A hot cache key expires.

10,000 requests miss at the same moment.
All 10,000 hit the database.
That's a cache stampede.

Fix: Let one request rebuild the value while the rest wait or get the stale copy.

[Sayan Saha @itzsayansaha]

Two servers have clocks 50ms apart.

Event A happens first. Event B happens later, but gets an earlier timestamp because its server's clock is behind.

Sort by timestamps, and you get the wrong order.

That's why distributed systems use sequence numbers or logical clocks to track event ordering, not just wall time.

[Sayan Saha @itzsayansaha]

@no_one_070705 Yess 🙌

[Sayan Saha @itzsayansaha]

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[Sayan Saha @itzsayansaha]

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[Sayan Saha @itzsayansaha]

@aiwithadb Yes, let's connect🙌