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#reliability

General discussions on building and maintaining reliable software systems.

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Cache Stampede Mitigation: Stale‑While‑Revalidate & Coalescing

Cache Stampede Mitigation: Stale‑While‑Revalidate & Coalescing

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4 min read
Our rate limit punished everyone except the customer causing the problem

Our rate limit punished everyone except the customer causing the problem

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2 min read
Nobody had timed the part that comes after the restore

Nobody had timed the part that comes after the restore

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2 min read
Our tool gateway says max_retries=2. It calls your tool exactly once.

Our tool gateway says max_retries=2. It calls your tool exactly once.

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17 min read
Timeouts Are a Contract: Three Numbers Per Service Call

Timeouts Are a Contract: Three Numbers Per Service Call

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4 min read
The queue had no limit so our timeouts meant nothing

The queue had no limit so our timeouts meant nothing

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2 min read
DNS Record Write Rejected Because Zone ID Is Not Domain Name — Validation Debug

DNS Record Write Rejected Because Zone ID Is Not Domain Name — Validation Debug

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4 min read
A deadlock doesn't care how many times you retry it

A deadlock doesn't care how many times you retry it

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4 min read
We announced read only mode and could not even sign in

We announced read only mode and could not even sign in

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2 min read
I Audited 38 Production Containers. Zero Use depends_on restart.

I Audited 38 Production Containers. Zero Use depends_on restart.

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6 min read
Disaster Recovery on Alibaba Cloud: Designing for Failure

Disaster Recovery on Alibaba Cloud: Designing for Failure

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3 min read
Hosted PDF API or Local PDF Libraries for Shipping Labels at Production Scale

Hosted PDF API or Local PDF Libraries for Shipping Labels at Production Scale

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5 min read
The admission webhook rejected every change, including the one that would fix it

The admission webhook rejected every change, including the one that would fix it

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2 min read
We scheduled a question for an hour when nobody could answer it

We scheduled a question for an hour when nobody could answer it

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3 min read
Every new replica took twenty more database connections

Every new replica took twenty more database connections

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2 min read
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