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Atomic Commit in SQLite (2007)
An important feature of transactional databases like SQLite is "atomic commit". Atomic commit means that either all database changes within a single transaction occur or none of them occur. With atomic commit, it is as if many different writes to different sections of the database file occur instantaneously and…
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Floating-Point Determinism (2013)
Is IEEE floating-point math deterministic? Will you always get the same results from the same inputs? The answer is an unequivocal “yes”. Unfortunately the answer is also an unequivocal “no”. I’m a…
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Differential Synchronization (2009)
Keeping two or more copies of the same document synchronized with each other in real-time is a complex challenge. This paper describes the differential synchronization algorithm. Differential synchronization offers scalability, fault-tolerance, and responsive collaborative editing across an unreliable network.
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Measuring context switching and memory overheads for Linux threads
In this post I want to explore the costs of threads on modern Linux machines, both in terms of time and space. The background context is designing high-load concurrent servers, where using threads is one of the common schemes .
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HTTP Analytics for 6M requests per second using ClickHouse
One of our large scale data infrastructure challenges here at Cloudflare is around providing HTTP traffic analytics to our customers. HTTP Analytics is available to all our customers via two options:
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Today's CPU vulnerability: what you need to know
Posted by Matt Linton, Senior Security Engineer and Pat Parseghian, Technical Program Manager [Google Cloud, G Suite, and Chrome customers...
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Mitigating Spectre with Site Isolation in Chrome
Posted by Charlie Reis, Site Isolator Speculative execution side-channel attacks like Spectre are a newly discovered security risk for web...