Around any good database sits the clients you import, the dashboards your team shares, the pipelines that feed it, the projects that build on top of it, and now the agents that query it. Read more ›
Rocket Lab launches satellite for U.S. Space Force Victus Haze responsive space exercise Rocket Lab launches satellite for U.S. Space Force Victus Haze responsive space exercise Read more ›
zstd with --auto: picks the optimal compression level for you. No more guessing between 1-22. Tested on 320 files across 8 types. 0 corruption, 98% beat default. Drop-in for facebook/zstd. Uses fra... Read more ›
RocksDB has historically been known for poor performance when tombstones accumulate. This has become a common problem within Meta, and the community has raised it as well. Here, we introduce an optimization that attempts to convert contiguous tombstones into a range tombstone during scans. As a result, instead of skipping through N tombstones, we only need to skip through a single range tombstone. Background: point tombstones and range tombstones RocksDB is an LSM-tree, so a delete does not e... Read more ›
The total biharmonic distance, which is the sum of the biharmonic distance between every pair of nodes in a network, is a key metric for evaluating network connectivity and robustness. In this paper, we study the problem of minimizing the total biharmonic distance by adding $k$ nonexistent edges for a given graph $G$ and budget $k$. The problem is computationally challenging. We show that the objective function of the problem is monotone but not... Read more ›
The opening post of a Low-Level Systems Design in Rust series, arguing that the biggest performance win is structural: replace a shared multi-producer cursor that serializes cores through cache-coherence traffic with one private single-writer SPSC ring per producer, converting quadratic writer contention into a cheap O(N) consumer sweep. Read more ›
Redis Data Structures Every Engineer Should Know- Strings store one value per key. They work for counters, session tokens, and cached payloads.- Hashes store an object's fields under one key. You can update one field without rewriting the rest.- Lists are ordered sequences with fast push and pop at both ends. They fit queues, feeds, and recent-item lists.- Sets hold unique members and support intersection, union, and difference. They cover tagging, follower overlap, and deduplication.- Sorted... Read more ›
With thanks to Nathan Barry's Can gzip be a language model? Read more ›
ClickHouse was released in open source on Jun 15 2016, ten years ago. Since then, it became the most popular open source analytical database with more than 2000 contributors. There are different levels of open-source. Level 0: The minimum level is making the code open to the public for reading, but ... Read more ›
NASA's Swift space observatory is falling out of orbit. Can a commercial company build a spacecraft in nine months to save it? Read more ›
geeksforgeeks.org Problem Statement Given a row-wise sorted matrix of size N × M, find the median of the matrix. The matrix contains an odd number of elements. Brute Force Intuition In an interview, you can explain it like this: Since every row is sorted, one straightforward approach is to collect all elements into a single array, sort them, and return the middle element. This works but ignores the fact that rows are already sorted. Complexity Time Complexity: O(N × M × log(N × M)) Space Comp... Read more ›
Data structures sound scary. They are not. Let this simple project show you exactly what they are and why they matter. Read more ›
Log-structured merge (LSM) trees attach an approximate-membership filter to every run and must split a fixed memory budget across them. The static optimum is known (Monkey); a large systems literature then makes the allocation adaptive, tracking shifting hotness online. We ask a prior question: when is that adaptivity worth its machinery? We give three analytical answers and validate them on synthetic sweeps, real Twitter production cache traces... Read more ›
Why dev-time CUDA profilers don't fit production inference, and what a profiler built for it looks like: low-overhead kernel attribution, host sync waits, and integrated telemetry. Read more ›
What is Starfall? SpaceX Falcon 9 rocket will launch the company's new spacecraft (uncrewed) on a demo mission in June 2026 from Cape Canaveral, Florida Read more ›
leetcode.com Problem Statement Given a sorted array where: Every element appears exactly twice. Only one element appears once. Find the single element in O(log N) time and O(1) space. Brute Force Intuition In an interview, you can explain it like this: Since every element appears twice except one, we can iterate through the array and count frequencies. The element with frequency 1 is our answer. This works but doesn't utilize the sorted nature of the array. Complexity Time Complexity: O(N) Sp... Read more ›
Skip to main content 48.1k SearchCtrlK Sign inGet started Get started Cloud Manage data Server admin Reference Integrations ClickStack chDB About Knowledge Base English * English * 日本語 * 中文 * Русский * 한국어 Skip to main content 48.1k SearchCtrlK Sign inGet started Get started Cloud Manage data Server admin Reference Integrations ClickStack chDB About Knowledge Base English * English * 日本語 * 中文 * Русский * 한국어 SearchCtrlK Edit this page One of the secrets to Clic... Read more ›
Hi everyone, I am Trends 24/7 and in this blog I’m going to show you the single most important data structure in all of blockchain, one… Read more ›