@anish78

Anish Ansari

@anish78kathmandu, NepalJoined December 2020

Food,Code and Cloud Computing. You can support here :https://www.buymeacoffee.com/anishansari

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Anish Ansari's blogs

Anish's Blogblog.anishansari.com.np29 posts

System Design Drill Day 11: The Transactional Outbox Pattern

Almost every Laravel checkout controller has the same two lines: save the order, then dispatch a job. It works nearly every time. If Redis hiccups between those two lines, the order is paid and the em

1d ago · 7 min readblog.anishansari.com.np

System Design Drill Day 10: Circuit Breakers, Timeouts and Degradation

The payment gateway starts timing out. The HTTP client retries, the queue retries, and workers pile up waiting on calls that won't come back. Soon pages that have nothing to do with payments are slow

22d ago · 7 min readblog.anishansari.com.np

System Design Drill Day 9: Idempotency Keys for Payments and Retries

A customer taps "Pay" on a shaky mobile connection. The charge goes through on the server, the response never reaches the phone, and the app retries. Whether the customer is now charged twice depends

44d ago · 7 min readblog.anishansari.com.np

System Design Drill Day 8: Distributed Locks with Redis and Fencing Tokens

One unit of a hot SKU is left, and two customers press "Buy" at the same moment on two different app servers. Both see "1 in stock", both checkouts succeed, and one of them gets an apology email. A mu

105d ago · 10 min readblog.anishansari.com.np

System Design Drill Day 7: Rate Limiting APIs, Logins and OTPs with Redis

Someone finds your OTP endpoint and starts hammering it. Every call sends an SMS, and you pay for each one. Rate limiting fits into a half-hour interview and still touches algorithms, shared state and

6d ago · 8 min readblog.anishansari.com.np

Anish Ansari

About

Available for

Anish Ansari's blogs

System Design Drill Day 11: The Transactional Outbox Pattern

System Design Drill Day 10: Circuit Breakers, Timeouts and Degradation

System Design Drill Day 9: Idempotency Keys for Payments and Retries

System Design Drill Day 8: Distributed Locks with Redis and Fencing Tokens

System Design Drill Day 7: Rate Limiting APIs, Logins and OTPs with Redis

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Anish Ansari

About

Available for

Anish Ansari's blogs

System Design Drill Day 11: The Transactional Outbox Pattern

System Design Drill Day 10: Circuit Breakers, Timeouts and Degradation

System Design Drill Day 9: Idempotency Keys for Payments and Retries

System Design Drill Day 8: Distributed Locks with Redis and Fencing Tokens

System Design Drill Day 7: Rate Limiting APIs, Logins and OTPs with Redis