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Deep, recent reads ranked by depth and freshness.

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  1. 01Cloudflare · architecture

    Origin Range Requests: Serving large files without range-request tuning

    Cloudflare replaced a legacy, fixed-size range caching design that suffered from bandwidth waste and memory pressure with a Pingora-based chunk coordinator. The new implementation dynamically combines cached chunks and aligned origin fetches to serve range requests accurately without manual tuning. This approach cut p99 time to first byte in half for R2 storage and reduced tiered cache traffic by six percent.

    DEPTH ■■■■■8 min read2 days ago

    DatabasesPerformanceRedis

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  2. 02Cloudflare · architecture

    Bringing post-quantum cryptography to geographically fenced key management

    Cloudflare introduced a post-quantum geographically restricted key manager in closed beta to enforce data sovereignty and protect customers against harvest-now-decrypt-later attacks. The team implemented a hybrid ML-KEM-768 and X25519 cryptographic design that separates globally distributed wrapped private keys from regionally restricted root keys. This ensures that decryption keys are only accessible within authorized geographical boundaries and fails closed if validation fails.

    DEPTH ■■■■■12 min read2 days ago

    Security

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  3. 03Cloudflare · architecture

    Under the hood, off the hot path: How D1 scales to millions of databases

    Cloudflare scaled its serverless SQLite database, D1, to support millions of databases by decoupling the control plane from the data plane. The team used distributed metadata caching via Workers KV, optimized database connections through Hyperdrive, and implemented a self-correcting heartbeat mechanism. This architecture prevents centralized bottlenecks and allows D1 to handle rapid on-demand database creation efficiently.

    DEPTH ■■■■■22 min read12 days ago

    Databases

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  4. 04Cloudflare · architecture

    Cloudflare deploys protections against php2shell vulnerability

    Recent disclosures revealed critical remote code execution and data exposure vulnerabilities in the PHP runtime. To mitigate the threat before public disclosure, Cloudflare developed full transaction detection to combine request and response signals within the WAF. This capability enabled automatic deployment of rules protecting customers against the php2shell exploits.

    DEPTH ■■■■■6 min read4 days ago

    Security

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  5. 05Cloudflare · postmortem

    8 eMudhra certificates are compromised. Here's what you need to know

    Private keys associated with eight eMudhra intermediate certificates were compromised, allowing potential traffic interception. Cloudflare prioritized patching critical services, released client and tunnel updates, and deployed mitigations across its products. Customers are advised to upgrade affected software, update custom trust stores, and avoid disabling verification despite error messages.

    DEPTH ■■■■■4 min read4 days ago

    Security

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