GitHub - graphql/dataloader: DataLoader is a generic utility to be used as part of your application's data fetching layer to provide a consistent API over various backends and reduce requests to those backends via batching and caching.
DataLoader is a generic utility to be used as part of your application's data fetching layer to provide a simplified and consistent API over various remote data sources such as databases or web services via batching and caching. A port of the "Loader" API originally developed by @schrockn at Facebook in 2010 as a simplifying force to coalesce the sundry key-value store back-end APIs which existed
PlanOut | A framework for online field experiments
Focus on parameters PlanOut provides randomized parameter values to Internet services. Instead of using constants for user interface elements or switches controlling the rollout of a new feature or ranking model, just use PlanOut to determine the value of these parameters. Now you have an experiment. Simple or complex It is easy to implement simple A/B tests in PlanOut. But it's also not much hard
ãƒãƒ¼ãƒ‰ãƒãƒ©ãƒ³ã‚µã®ã‚¢ãƒ¼ã‚テクãƒãƒ£ã„ã‚ã„ã‚ - yunazuno.log
å°‘ã—å‰ã«ï¼ŒFacebookã®ãƒãƒ¼ãƒ‰ãƒãƒ©ãƒ³ã‚µãŒè©±é¡Œã«ãªã£ã¦ã„ãŸï¼Ž blog.stanaka.org ã“ã®ã‚¨ãƒ³ãƒˆãƒªã‚’èªã‚“ã§ï¼Œå„種Webサービス事æ¥è€…ãŒã©ã†ã„ã£ãŸãƒãƒ¼ãƒ‰ãƒãƒ©ãƒ³ã‚¹ã‚¢ãƒ¼ã‚テクãƒãƒ£ã‚’採用ã—ã¦ã„ã‚‹ã®ã‹æ°—ã«ãªã£ãŸã®ã§èª¿ã¹ã¦ã¿ãŸï¼Ž ã–ã£ãり検索ã—ãŸé™ã‚Šã ã¨ï¼ŒMicrosoft, CloudFlareã®äº‹ä¾‹ãŒè¦‹ã¤ã‹ã£ãŸã®ã§ï¼ŒFacebookã®ä¾‹ã‚‚ä½µã›ã¦ã¾ã¨ã‚ã¦ã¿ãŸï¼Ž アーã‚テクãƒãƒ£éƒ¨åˆ†ã«æ³¨ç›®ã—ã¦ã¾ã¨ã‚ãŸã®ã§ï¼Œãƒžãƒã‚¸ãƒ¡ãƒ³ãƒˆæ–¹æ³•ã‚„実装方法，ãƒãƒ¼ãƒ‰ãƒãƒ©ãƒ³ã‚¹ä»¥å¤–ã®æ©Ÿèƒ½ã‚„最é©åŒ–手法ã¨ã„ã£ãŸéƒ¨åˆ†ã®è©³ç´°ã«ã¯è§¦ã‚Œãªã„ã“ã¨ã«ã™ã‚‹ï¼Ž 事例1: Microsoft Azure 'Ananta' Microsoftã®Azureã§æŽ¡ç”¨ã•ã‚Œã¦ã„ã‚‹(ã„ãŸï¼Ÿ)ãƒãƒ¼ãƒ‰ãƒãƒ©ãƒ³ã‚µã®ã‚¢ãƒ¼ã‚テクãƒãƒ£ã¯ï¼Œä¸‹è¨˜ã®è«–æ–‡ãŒè©³ã—ã„． Parveen Patel et al., Ananta: cloud scale load balancing
facebookã®13億ユーザーを支ãˆã‚‹ãƒãƒ¼ãƒ‰ãƒãƒ©ãƒ³ã‚µãƒ¼ã®è©± - stanaka's blog
最近ã€SREãŒè©±é¡Œã§ã™ã。 tech.mercari.com www.wantedly.com ã¨ã„ã†ã“ã¨ã§SREã«ã¤ã„ã¦èª¿ã¹ã¦ãŸã‚‰ã€SREconãªã‚“ã¦ã‚‚ã®ãŒé–‹å‚¬ã•ã‚Œã¦ã„ãŸã®ã§ä¸ã‚’見ã¦ãŸã‚‰ã€ã€ŒBuilding a Billion User Load Balancerã€ã¨ã„ã†ã‚¿ã‚¤ãƒˆãƒ«ã§Facebookã®DNS〜LBã¾ã§ã®è©±ãŒã‚ã£ãŸã®ã§ã€ãã®ãƒ¡ãƒ¢ã§ã™ã€‚ Building a Billion User Load Balancer | USENIX tl;dr tinydns + IPVS 㧠Facebookè¦æ¨¡ã¯ã„ã‘ã‚‹ httpsã®æŽ¥ç¶šç¢ºç«‹ã¯ã‹ãªã‚Šé‡ã„(RTTã®4å€ = RTT 150msã¨ã™ã‚‹ã¨GETã¾ã§600ms)ã®ã§ã€å¤ªå¹³æ´‹è¶Šãˆã¨ã‹ã¯åŽ³ã—ã„ httpsを終端ã•ã›ã‚‹CDNã¨ã‹ã¯æ´»ç”¨ã®å¯èƒ½æ€§ã‚ã‚Šãㆠ(国内ã ã‘を考慮ã™ã‚‹ãªã‚‰å½±éŸ¿ã¯è»½å¾®ã‹ã‚‚) メモ L4 LB shiv (IPVS + pyt
Retiring the Nuclide Open Source Project
A unified developer experience for software development Nuclide is built as a single package on top of Atom to provide hackability and the support of an active community. It provides a first-class development environment for React Native, Hack and Flow projects. Retiring the Nuclide Open Source Project A few years ago, we introduced Nuclide to provide a first-class IDE experience. We’ve made treme
React Native · Learn once, write anywhere
function HomeScreen() { return ( <View> <Text> Hello World 👋 ðŸŒ!</Text> </View> ); } Written in JavaScript, rendered with native code. React primitives render to native platform UI, meaning your app uses the same native platform APIs other apps do. Native development for everyoneReact Native lets you create truly native apps and doesn't compromise your users' experiences. It provides a core set o
Use React Native
React Native 0.79 introduces improvements to developer experience, performance, and stability across platforms. Key updates include enhanced TypeScript support, optimizations for Animated components, and refinements to the new architecture on Android and iOS. … Read more React Native v0.78.0 introduces breaking changes in Codegen, DevTools, and platform-specific APIs. Notable additions include new
ãªãœä»®æƒ³DOMã¨ã„ã†æ¦‚念ãŒä¿ºé”ã®é‚を震ãˆã•ã›ã‚‹ã®ã‹ - Qiita
追記: æƒ…å ±ãŒè‰²ã€…ã¨å¤ããªã£ãŸãŸã‚ã€2020å¹´ã«æ›¸ãç›´ã—ãŸç‰ˆã¸ã®ãƒªãƒ³ã‚¯ã‚’å¼µã£ã¦ãŠãã¾ã™ã€‚ ã“ã®è¨˜äº‹ã¯ VirtualDOM Advent Calendar 2014 - Qiita ã®åˆæ—¥ã§ã™ã€‚ åˆæ—¥ã¨ã„ã†ã“ã¨ã§ã€åŸºèª¿è¬›æ¼”風ã«ã€Virtual DOMã¨ã¯ãªã«ã‹ã€ãªãœåƒ•ã¯ã“ã‚“ãªèˆˆå¥®ã—ã¦ã„ã‚‹ã®ã‹ï¼ã¨ã„ã†è©±ã‹ã‚‰ã€‚ Virtual DOMã¨ã¯ãªã«ã‹ æ—¢å˜ã®æ¦‚念ã§å½“ã¦ã¯ã‚ã‚‹ã¨ã€JavaScriptã®MVC, MVW(Whatever)フレームワークã®Viewã«ä½ç½®ã—ã¾ã™ã€‚ãŒã€ãã®ç¨‹åº¦ã§ã¯çµ‚ã‚ã‚Šã¾ã›ã‚“。仮想DOMã¨ã¯ä¸–界をé©å‘½ã™ã‚‹åŠ›ã§ã‚ã‚Šã€ã“ã®jQueryã®DOMæ“作ã§æ±šã‚Œãã£ãŸãƒ•ãƒãƒ³ãƒˆã‚¨ãƒ³ãƒ‰ã‚’æ•‘ã†æ•‘世主ãªã®ã§ã™ã€‚ ç¾æ™‚点ã§è‡ªåˆ†ãŒçŸ¥ã£ã¦ã„ã‚‹é™ã‚Šã¯ã€ä»¥ä¸‹ã®å®Ÿè£…を指ã—ã¾ã™ã€‚ facebook/react 最も使ã‚ã‚Œã¦ã‚‹Facebookã®å®Ÿè£… Matt-Esch/virtual-dom Altenative
Facebook ã®æ±ºæ–：MVCã¯ã‚¹ã‚±ãƒ¼ãƒ«ã—ãªã„。ãªã‚‰ã° Flux ã 。
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Introducing mcrouter: A memcached protocol router for scaling memcached deployments
Introducing mcrouter: A memcached protocol router for scaling memcached deployments Most web-based services begin as a collection of front-end application servers paired with databases used to manage data storage. As they grow, the databases are augmented with caches to store frequently-read pieces of data and improve site performance. Often, the ability to quickly access data moves from being an
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By Intel Free Press ギガãƒã‚¤ãƒˆã‹ã‚‰ãƒšã‚¿ãƒã‚¤ãƒˆ(100万ギガãƒã‚¤ãƒˆ)ã¾ã§ã‚らゆるサイズã®ãƒ‡ãƒ¼ã‚¿ã‚’インタラクティブã«è§£æžã—ã¦å¿…è¦ãªãƒ‡ãƒ¼ã‚¿ã‚’発見å¯èƒ½ã¨ãªã‚‹ã‚ªãƒ¼ãƒ—ンソースã®SQL対応分散クエリエンジンãŒPrestoã§ã™ã€‚Facebookã®ã‚ˆã†ãªä¼æ¥ãŒæŒã¤å¤§é‡ã®å•†æ¥ãƒ‡ãƒ¼ã‚¿ã§ã‚‚高速ã«å‡¦ç†å¯èƒ½ã¨ãªã‚‹ã‚ˆã†ã«è¨è¨ˆã•ã‚Œã¦ãŠã‚Šã€Prestoã®å‡ºã™ã‚¯ã‚¨ãƒª(データベース管ç†ã‚·ã‚¹ãƒ†ãƒ ã«å¯¾ã™ã‚‹å‡¦ç†è¦æ±‚ã‚’æ–‡å—列ã¨ã—ã¦è¡¨ã—ãŸã‚‚ã®)ã¯è¤‡æ•°ã‚½ãƒ¼ã‚¹ã®ãƒ‡ãƒ¼ã‚¿ã¨çµ„ã¿åˆã‚ã›ã‚‹ã“ã¨ã‚‚å¯èƒ½ã€‚ã“ã®ã‚·ã‚¹ãƒ†ãƒ を開発ã—ãŸFacebookã§ã¯ã€ç´„300ペタãƒã‚¤ãƒˆã«ã‚‚åŠã¶ä¼æ¥å†…部ã®ãƒ‡ãƒ¼ã‚¿ã‚’ä¿ç®¡ã™ã‚‹ãƒ‡ãƒ¼ã‚¿ãƒ»ã‚¦ã‚§ã‚¢ãƒã‚¦ã‚¹ã«ã¦Prestoを使用ã—ã¦ãŠã‚Šã€æ¯Žæ—¥1000人を超ãˆã‚‹Facebookã®å¾“æ¥å“¡ãŸã¡ãŒ1日当ãŸã‚Š3万以上ã®ã‚¯ã‚¨ãƒªã‚’走らã›ã€1ペタãƒã‚¤ãƒˆä»¥ä¸Šã®ãƒ‡ãƒ¼ã‚¿ãŒã‚¹ã‚ャンã•ã‚Œã¦ã„ã‚‹ã€ã¨ã®ã“ã¨ã§ã™ã€‚ Presto | Distribut
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ãŠãらã世界ã§ã‚‚ã£ã¨ã‚‚大è¦æ¨¡ã«MySQLã®ã‚¯ãƒ©ã‚¹ã‚¿ã‚’展開ã—ã€é‹ç”¨ã—ã¦ã„ã‚‹ã®ãŒFacebookã§ã—ょã†ã€‚複数ã®ãƒ‡ãƒ¼ã‚¿ã‚»ãƒ³ã‚¿ãƒ¼ã«ã¾ãŸãŒã‚Šä½•åƒå°ã‚‚ã®MySQLサーãƒã‚’é‹ç”¨ã™ã‚‹ãŸã‚ã«ã€è‡ªå‹•åŒ–ã®ä»•çµ„ã¿ã¯æ¬ ã‹ã›ã¾ã›ã‚“。 ãã®è‡ªå‹•åŒ–ãŒã©ã®ã‚ˆã†ãªä»•çµ„ã¿ã«ãªã£ã¦ã„ã‚‹ã®ã‹ã€‚Facebookã®ãƒ‡ãƒ¼ã‚¿ãƒ™ãƒ¼ã‚¹ã‚¨ãƒ³ã‚¸ãƒ‹ã‚¢ã§ã‚ã‚‹Shlomo Priymakæ°ãŒã€Under the hood: MySQL Pool Scanner (MPS)ã¨ã„ã†è¨˜äº‹ã‚’Facebookã§å…¬é–‹ã—ã¦ã„ã¾ã™ã€‚ ã‹ãªã‚Šé•·ã„記事ãªã®ã§ã€ã“ã“ã§ã¯ãã®ãƒã‚¤ãƒ³ãƒˆã‚’ã¾ã¨ã‚ã¦è§£èª¬ã—ã¦ã¿ã¾ã—ãŸã€‚詳細ã¯ãœã²åŽŸæ–‡ã‚’ã‚ãŸã£ã¦ã¿ã¦ãã ã•ã„。 MPSã®ãŠã‚‚ãª3ã¤ã®æ©Ÿèƒ½ Facebookã§ç¨¼åƒã—ã¦ã„ã‚‹MySQLã¯ã€ã¤ãã«1ã¤ã®ãƒžã‚¹ã‚¿ãƒ¼ã¨ãã“ã‹ã‚‰ãƒ¬ãƒ—リケーションã•ã‚ŒãŸè¤‡æ•°ã®ã‚¹ãƒ¬ãƒ¼ãƒ–ã«ã‚ˆã‚‹ãƒ¬ãƒ—リカセットを構æˆã—ã¦ã„ã¾ã™ã€‚ã“ã®ãƒ¬ãƒ—リカセットã®æ§‹é€ ã‚’ç¶æŒã—続ã‘ã‚‹ã“ã¨ã§ã€å¯ç”¨æ€§ã¨
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