rulereceipt

The undo has to exist before the write does

An agent that changes something runs in the order decide, act, report. Verification, where there is any, reads what already happened. That's a fine shape for a log.

• Undo must precede write operation in revisionist logging approach
• Each change given unique canonical identity with verified inverse
• System requires inverse-capable tools, currently only 13.8% available

1h ago ·dev.to

How Traceroute Actually Works

The Internet is not One Wire When you open a website, it feels instant and it feels like one step. In reality, that request hops through a chain of routers — your home router, your ISP's equipment…

• Traceroute identifies network latency by mapping data packet paths.
• It uses TTL field to drop packets at each hop, revealing IP addresses.
• ICMP error messages provide hop information, but may be blocked by routers.

1h ago ·dev.to

API rate limiting: patterns, algorithms, and how to do it right

Cross-post. Original: stellarbytecapital.com/blog/api-rate-limiting Rate limiting looks trivial — "just count requests and block over N" — and quietly turns into a distributed-systems problem the…

• Rate limiting protects APIs from misuse and mitigates traffic spikes.
• Core algorithms include fixed window, sliding window, and token bucket.
• Distributed rate limiting requires centralized counters to avoid race conditions.

1h ago ·dev.to

Stop Guessing Your App's Resource Requirements

After development comes deployment - whether on-premise or on a cloud based environment. And then we face a simple question: how much resource should I assign to this system?

1h ago ·dev.to