Linux kernel: Facebook open-sources new components - Facebook Code
Facebook open-sources new suite of Linux kernel components and tools An integral part of Facebook’s engineering culture has always been our development work on open source solutions that solve real-world production issues and address key challenges in modern large-scale cloud computing. Today, we are announcing a suite of open source Linux kernel components and related tools that address critical
Introduction to Kubernetes (LFS158) | Linux Foundation
Want to learn Kubernetes? Get an in-depth primer on this powerful system for managing containerized applications in this free course. This course is for teams considering or beginning to use Kubernetes for container orchestration who need guidelines on how to start transforming their organization with Kubernetes and cloud native patterns. Some knowledge of Linux system administration is helpful bu
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exa a modern replacement for ls command in rust for Linux/Unix
🧠nixCraft → Open Source → Command Line Hacks → exa a modern replacement for ls command in rust for Linux/Unix ls is a command to show files in Linux and Unix-like operating systems. A ls command first appeared in a version of AT&T UNIX as well as in Multics. BSD and GNU Coreutils package provides the ls command with minor syntax changes. There is now third alternative named exa. It is a modern r
Linux tracing systems & how they fit together
July 5, 2017 I’ve been confused about Linux tracing systems for years. There’s strace, and ltrace, kprobes, and tracepoints, and uprobes, and ftrace, and perf, and eBPF, and how does it all fit together and what does it all MEAN? Last week I went to Papers We Love and later me & Kamal hung out with Suchakra at Polytechnique Montréal (where LTTng comes from) and finally I think I understand how all
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主ã«ã‚¢ãƒ—リケーション開発者å‘ã‘ã«ã€Linuxサーãƒä¸Šã®å•é¡Œã‚’調査ã™ã‚‹ãŸã‚ã«ã€ã‚¦ã‚§ãƒ–オペレーションエンジニアã¨ã—ã¦æ—¥å¸¸çš„ã«ã‚„ã£ã¦ã„ã‚‹ã“ã¨ã‚’紹介ã—ã¾ã™ã€‚ ã¨ã‚Šã‚ãˆãšèª¿ã¹ãŸã“ã¨ã‚’羅列ã—ã¦ã„ã‚‹ã®ã§ã¯ãªãã€æœ¬å½“ã«è‡ªåˆ†ãŒç¾å ´ã§ä½¿ã£ã¦ã„ã‚‹ã‚‚ã®ã ã‘ã«æƒ…å ±ã‚’çµžã£ã¦ã„ã¾ã™ã€‚ 普段使ã£ã¦ã„ã‚‹ã‘ã‚Œã©ã‚‚ã€ã‚¢ãƒ—リケーション開発者å‘ãã§ã¯ãªã„ã‚‚ã®ã¯ã‚ãˆã¦çœã„ã¦ã„ã¾ã™ã€‚ MySQLã‚„Nginxãªã©ã€å€‹åˆ¥ã®ãƒŸãƒ‰ãƒ«ã‚¦ã‚§ã‚¢ã«é™å®šã—ãŸãƒŽã‚¦ãƒã‚¦ã«ã¤ã„ã¦ã¯æ›¸ã„ã¦ã„ã¾ã›ã‚“。 ãƒã‚°ã‚¤ãƒ³ã—ãŸã‚‰ã¾ãšç¢ºèªã™ã‚‹ã“㨠他ã«ãƒã‚°ã‚¤ãƒ³ã—ã¦ã„る人ãŒã„ã‚‹ã‹ç¢ºèªï¼ˆw） サーãƒã®ç¨¼åƒæ™‚é–“ã®ç¢ºèª (uptime) プãƒã‚»ã‚¹ãƒ„リーをã¿ã‚‹ (ps) NICã‚„IPアドレスã®ç¢ºèª (ip) ファイルシステムã®ç¢ºèªï¼ˆdf） è² è·çŠ¶æ³ç¢ºèª top iostat netstat / ss ãƒã‚°èª¿æŸ» /var/log/messages or /var/log/syslog /
Introduction · Linux Inside
linux-insides A book-in-progress about the linux kernel and its insides. The goal is simple - to share my modest knowledge about the insides of the linux kernel and help people who are interested in linux kernel insides, and other low-level subject matter. Feel free to go through the book Start here Questions/Suggestions: Feel free about any questions or suggestions by pinging me at twitter @0xAX,
「技術的é©æ–°ã«ã¤ã„ã¦è©±ã™ã ã‘ã®ãƒ¤ãƒ„ã¯ã‚¯ã‚½ã ã€é»™ã£ã¦æ‰‹ã‚’å‹•ã‹ã›ã€ã¨Linux生ã¿ã®è¦ªã®ãƒªãƒ¼ãƒŠã‚¹ãƒ»ãƒˆãƒ¼ãƒãƒ«ã‚ºãŒèªžã‚‹
Linuxカーãƒãƒ«ã‚’開発ã—ãŸãƒªãƒ¼ãƒŠã‚¹ãƒ»ãƒˆãƒ¼ãƒãƒ«ã‚ºæ°ãŒã€Linux FoundationãŒé–‹å‚¬ã—ãŸOpen Source Leadership Summit 2017(OSLS 2017)ã§è¡Œã‚ã‚ŒãŸå¯¾è«‡ã§ã€è¿‘å¹´ã®ãƒ†ã‚¯ãƒŽãƒã‚¸ãƒ¼æ¥ç•Œã«ã¤ã„ã¦ã‚„ã€è‡ªèº«ã®ä»•äº‹ã®è€ƒãˆæ–¹ã‚’語りã¾ã—ãŸã€‚ Talk of tech innovation is bullsh*t. Shut up and get the work done – says Linus Torvalds • The Register http://www.theregister.co.uk/2017/02/15/think_different_shut_up_and_work_harder_says_linus_torvalds/ OSLS 2017ã§ãƒªãƒ¼ãƒŠã‚¹ãƒ»ãƒˆãƒ¼ãƒãƒ«ã‚ºæ°ã¯ã€Linux Foundationã§å–ç· å½¹ã‚’å‹™ã‚るジム・ゼムリンæ°ã¨å¯¾è«‡ã‚’
Talk of tech innovation is bullsh*t. Shut up and get the work done – says Linus Torvalds
OSLS Linus Torvalds believes the technology industry's celebration of innovation is smug, self-congratulatory, and self-serving. The term of art he used was more blunt: "The innovation the industry talks about so much is bullshit," he said. "Anybody can innovate. Don't do this big 'think different'... screw that. It's meaningless. Ninety-nine per cent of it is get the work done." In a deferential
PostgreSQL vs. Linux kernel versions - 2ndQuadrant | PostgreSQL
2ndQuadrant is now part of EDBBringing together some of the world's top PostgreSQL experts. I’ve published multiple benchmarks comparing different PostgreSQL versions, as for example the performance archaeology talk (evaluating PostgreSQL 7.4 up to 9.4), and all those benchmark assumed fixed environment (hardware, kernel, …). Which is fine in many cases (e.g. when evaluating performance impact of
プãƒã‚»ã‚¹ã®ãƒ©ãƒ³ã‚ュー待ã¡æ™‚é–“ã¨I/Oå¾…ã¡æ™‚間を調ã¹ã‚‹ - ablog
cat file|awk ã§ã¯å®Ÿè¡Œæ™‚é–“ < CPU時間ã¨ãªã£ã¦ã„ã¾ã™ãŒã€cat ㌠I/O wait ã—ã¦ã„ãªã„ã¨ã¯é™ã‚Šã¾ã›ã‚“。実行時間ã¯å˜ç´”ã«çµ‚了時間 - 開始時間ã§ç®—出ã—ã¾ã™ãŒã€CPU時間ã¯ãƒ—ãƒã‚»ã‚¹ã®CPU時間を getrusage システムコールã§å–å¾—ã—ã¾ã™ã€‚catã®ãƒ—ãƒã‚»ã‚¹ã¨ awk ã®ãƒ—ãƒã‚»ã‚¹ãŒä¸¦åˆ—実行ã•ã‚Œã¦ã„る期間ãŒã‚ã‚‹ãŸã‚ã€å®Ÿè¡Œæ™‚é–“ < CPU時間ã¨ãªã£ã¦ã„ã¾ã™ã€‚例ãˆã°ã€CPUãƒã‚¦ãƒ³ãƒ‰ãª2プãƒã‚»ã‚¹ãŒã»ã¼å®Œå…¨ã«ä¸¦åˆ—実行ã•ã‚Œã‚‹ã¨ã€å®Ÿè¡Œæ™‚é–“ * 2 ≒ CPU時間 ã¨ãªã£ãŸã‚Šã—ã¾ã™ã€‚ （ä¸ç•¥ï¼‰ 大ããªãƒ†ã‚ストファイルをawkã§å‡¦ç†ã™ã‚‹ã¨ãã«catã§æŠ•ã’込むã¨é€Ÿã„ç†ç”± - ablog ã¨æ›¸ãã¾ã—ãŸãŒã€ãƒ—ãƒã‚»ã‚¹ã® ランã‚ュー待ã¡æ™‚間㯠/proc//sched ã®2列目(sched_info.run_delay) I/Oå¾…ã¡æ™‚間㯠/proc//schedstat ã® se.stati
Introduction · Linux Inside
linux-insides A book-in-progress about the linux kernel and its insides. The goal is simple - to share my modest knowledge about the insides of the linux kernel and help people who are interested in linux kernel insides, and other low-level subject matter. Feel free to go through the book Start here Questions/Suggestions: Feel free about any questions or suggestions by pinging me at twitter @0xAX,
Measuring Intel Hyper-Thread Overhead
Multi-core processors are capable of running multiple software streams/tasks concurrently. Multi-core allows a physical processor to simultaneously execute instructions from multiple processes or threads. Core of a processor is the part that executes application instructions. Core is shared by hardware threads (called Hyper-Threads). When two hyper-threads are active in the same core, it results i
Why we use the Linux kernel's TCP stack
A recent blog post posed the question Why do we use the Linux kernel's TCP stack?. It triggered a very interesting discussion on Hacker News. I've also thought about this question while working at CloudFlare. My experience mostly comes from working with thousands of production machines here and I can try to answer the question from that perspective. CC BY 2.0 image by John Vetterli Let's start wit
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Open Ecosystem
Performance Tuning Guide | Red Hat Product Documentation
Understanding load average vs. cpu usage
Linux Memory Management
GitHub - 0xAX/linux-insides: A little bit about a linux kernel
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