On Uber’s Choice of Databases
TranslationsA Japanese translation of this article is available here. A Chinese translation of this article is available here. A few days ago Uber published the article “Why Uber Engineering Switched from Postgres to MySQLâ€. I didn’t read the article right away because my inner nerd told me to do some home improvements instead. While doing so my mailbox was filling up with questions like “Is Postg
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分散システムã®Fault Injectionã®è©± NTTデータテクノãƒã‚¸ãƒ¼ã‚«ãƒ³ãƒ•ã‚¡ãƒ¬ãƒ³ã‚¹2017ã§ç™ºè¡¨ã™ã‚‹éš›ã«ç”¨ã„ãŸãƒ—レゼン資料 https://oss.nttdata.com/hadoop/event/201710/index.html
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言ã„訳ã‹ã‚‰å§‹ã‚ã¾ã™ã€‚ã“ã®è¨˜äº‹ã‚’（途ä¸ã¾ã§ã§ã‚‚）èªã‚“ã 人ã¯ã€æ¬¡ã®ã‚ˆã†ã«è¨€ã„ãŸããªã‚‹ã§ã—ょã†ã€‚ 『ç†è«–ã‹ã‚‰å¦ã¶ãƒ‡ãƒ¼ã‚¿ãƒ™ãƒ¼ã‚¹å®Ÿè·µå…¥é–€ã€ã¯è‰¯ã„本ãªã®ã‹æ‚ªã„本ãªã®ã‹ã€ã„ã£ãŸã„ã©ã£ã¡ãªã‚“ã よ?! ã“ã®æœ¬ã¯é–“é•ã„や説明ä¸è¶³ãŒã‚ã‚Šã€èª¤èªã•ã‚Œã‚„ã™ã„表ç¾ã‚‚多ãã€ãã®ç‚¹ã§ã¯æ®‹å¿µãªæœ¬ã§ã™ã€‚ã—ã‹ã—ã€é¢ç™½ã„アイディアã€ã™ã‚‹ã©ã„観察もå«ã¾ã‚Œã¦ã„ã¦ã€è¡Œé–“を補ã„æ·±èªã¿ã™ã‚Œã°ã€å¤šãã®ç¤ºå”†ã‚’得られる本ã§ã‚‚ã‚ã‚Šã¾ã™ã€‚ よã£ã¦ã€ã€Œè‰¯ã„ï¼æ‚ªã„ã€ã®äºŒæŠžã§ã¯ç”ãˆã‚‰ã‚Œã¾ã›ã‚“。良ã„点ã¨æ‚ªã„点ã®ä¸¡æ–¹ã‚’ã€ã§ãã‚‹ã ã‘客観的ã«è¨˜è¿°ã™ã‚‹ã—ã‹ãªã„ã®ã§ã™ã€‚ãれをã—ãŸçµæžœã€é•·ã„記事ã¨ãªã‚Šã¾ã—ãŸã€‚ 内容： ã“ã¨ã®ç™ºç«¯ï¼š zhanponã•ã‚“ã®æ‰¹åˆ¤ 奥野本æ“è·ã¨å¥¥é‡Žæœ¬æ‰¹åˆ¤ 僕ã®æ“è·ãƒ»æ‰¹åˆ¤ã®æ–¹é‡ zhanponã•ã‚“ã®æŒ‡æ‘˜ã®å†æ¤œè¨Ž 1. è«–ç†çš„ãªçŸ›ç›¾ã¨ãƒ‡ãƒ¼ã‚¿ã®ä¸æ•´åˆã‚’æ··åŒã—ã¦ã„ã‚‹ 2. 命題論ç†ã®é™ç•Œã«ã¤ã„ã¦ã®èª¬æ˜ŽãŒãŠã‹ã—ã„ 3. å¤å…¸è«–ç†ã®å®šç¾©ã‚’é–“é•ãˆã¦ã„ã‚‹ 4.
You Are Not Google
Software engineers go crazy for the most ridiculous things. We like to think that we’re hyper-rational, but when we have to choose a technology, we end up in a kind of frenzy — bouncing from one person’s Hacker News comment to another’s blog post until, in a stupor, we float helplessly toward the brightest light and lay prone in front of it, oblivious to what we were looking for in the first place
MySQL with InnoDB ã®ã‚¤ãƒ³ãƒ‡ãƒƒã‚¯ã‚¹ã®åŸºç¤ŽçŸ¥è˜ã¨ã‚ã‚ŠãŒã¡ãªé–“é•ã„ - クックパッド開発者ブãƒã‚°
ã“ã‚“ã«ã¡ã¯ã€ã‚µãƒ¼ãƒ“ス開発部ã®è’引 (@a_bicky) ã§ã™ã€‚ çªç„¶ã§ã™ãŒã€RDBMS ã®æ—¢å˜ã®ãƒ†ãƒ¼ãƒ–ルを見ã¦ã¿ãŸã‚‰ã€Œä½•ã§ã“ã‚“ãªã«ã‚¤ãƒ³ãƒ‡ãƒƒã‚¯ã‚¹ã らã‘ãªã®ï¼Ÿã€ã¿ãŸã„ãªçµŒé¨“ã¯ã‚ã‚Šã¾ã›ã‚“ã‹ï¼Ÿä¸è¦ãªã‚¤ãƒ³ãƒ‡ãƒƒã‚¯ã‚¹ã¯å®¹é‡ã‚’圧迫ã—ãŸã‚Šã€æŒ¿å…¥ãŒé…ããªã£ãŸã‚Šã¨è‰¯ã„ã“ã¨ãŒã‚ã‚Šã¾ã›ã‚“。 ãã‚“ãªã‚ã‘ã§ã€ä»Šå›žã¯ãƒ¬ã‚³ãƒ¼ãƒ‰ã‚’検索ã™ã‚‹ãŸã‚ã«å¿…è¦ãªã‚¤ãƒ³ãƒ‡ãƒƒã‚¯ã‚¹ã®åŸºç¤ŽçŸ¥è˜ã¨ã€ã‚ˆã見ã‹ã‘ã‚‹ä¸é©åˆ‡ãªã‚¤ãƒ³ãƒ‡ãƒƒã‚¯ã‚¹ã«ã¤ã„ã¦è§£èª¬ã—ã¾ã™ã€‚クックパッドã§ã¯ Rails ã®ãƒ‡ãƒ¼ã‚¿ãƒ™ãƒ¼ã‚¹ã¨ã—ã¦ä¸»ã« MySQL 5.6ã€MySQL ã®ã‚¹ãƒˆãƒ¬ãƒ¼ã‚¸ã‚¨ãƒ³ã‚¸ãƒ³ã¨ã—ã¦ä¸»ã« InnoDB を使ã£ã¦ã„ã‚‹ã®ã§ã€MySQL 5.6 ã® InnoDB ã«ã¤ã„ã¦è§£èª¬ã—ã¾ã™ã€‚ InnoDB ã®ã‚¤ãƒ³ãƒ‡ãƒƒã‚¯ã‚¹ã«é–¢ã™ã‚‹åŸºç¤ŽçŸ¥è˜ インデックスã®æ§‹é€ (B+ 木) InnoDB ã§ã¯ B+ 木ãŒä½¿ã‚ã‚Œã¦ã„ã¾ã™ã€‚B+ 木ã¯æ¬¡ã®ã‚ˆã†ãªç‰¹å¾´ã‚’æŒã£ãŸæœ¨æ§‹é€ ã§ã™ã€‚ 次数を b ã¨ã™ã‚‹ã¨ã€
Jepsen: MongoDB 3.4.0-rc3
In April 2015, we discussed stale and dirty reads in MongoDB 2.6.7. However, writes appeared to be safe; update-only workloads with majority write concern were linearizable. This conclusion was not entirely correct. In this Jepsen analysis, we develop new tests which show the MongoDB v0 replication protocol is intrinsically unsafe, allowing the loss of majority-committed documents. In addition, we
Distributed Systems Safety Research
About Jepsen Jepsen aims to improve the safety of distributed databases, queues, consensus systems, etc. We maintain an open source library for safety testing, and publish free, in-depth analyses of specific systems. In each analysis we explore whether the system lives up to its documentation’s claims, file new bugs, and suggest recommendations for operators. In addition to paid analysis, Jepsen o
Def Startup - Unleash Your Gaming Potential with Expert PC and Console Assistance
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Gay marriage: the database engineering perspective @ Things Of Interest
I have never seen a paper talking about gay marriage that was entertaining, doesn't matter if you're for or against it, still an entertaining read, now THAT's how articles about current issues should be written! That was pretty cool. Things like this is what keeps me coming back. This and your fiction. As to the "ban all marriage," I've thought similarly recently. It occurred to me that the whole
カーãƒã‚®ãƒ¼ãƒ¡ãƒãƒ³ã®DBã«é–¢ã™ã‚‹è¬›ç¾©ãŒé¢ç™½ã„ã®ã§ãŠã™ã™ã‚ - ã ã„ãŸã„よãã‚ã‹ã‚‰ãªã„ブãƒã‚°
ã“ã“ã«æ›¸ãã“ã¨ã«ã‚ˆã£ã¦é€”ä¸ã§ã‚„ã‚られãªãã™ã‚‹ãƒ¡ã‚½ãƒƒãƒ‰ã§ã™ã€‚ ãƒãƒƒã‚«ãƒ¼ãƒ‹ãƒ¥ãƒ¼ã‚¹ã‚’眺ã‚ã¦ã„ãŸã‚‰ä»¥ä¸‹ã®ã‚ˆã†ãªCS系講義動画ã®ã¾ã¨ã‚リãƒã‚¸ãƒˆãƒªãŒæµã‚Œã¦ã„ã¾ã—ãŸã€‚ GitHub - Developer-Y/cs-video-courses: List of Computer Science courses with video lectures. ã¸ãƒ¼ã£ã¨æ€ã„ãªãŒã‚‰ä½•å€‹ã‹ãƒãƒã£ã¦ã¿ãŸã¨ã“ã‚以下ã«å‡ºãã‚ã—ã¾ã—ãŸã€‚ 15721.courses.cs.cmu.edu 英語ãŒï¼ˆè‡ªåˆ†ã«ã¨ã£ã¦ï¼‰èžãå–ã‚Šã‚„ã™ãã€å‹•ç”»ã®å“質（画質やスライドãŒã¡ã‚ƒã‚“ã¨è¦‹ãˆã‚‹ã‹ã©ã†ã‹ã¨ã„ã£ãŸéƒ¨åˆ†ï¼‰ã‚‚良ã„ã‚‚ã®ã§ã‹ã¤èˆˆå‘³ã®ã‚る内容ã§å‡ºæ¥ã‚Œã°ã‚¹ãƒ©ã‚¤ãƒ‰ã‚‚ãŠã—ゃれã§ãƒ»ãƒ»ãƒ»ã¨ãªã‚‹ã¨ãªã‹ãªã‹å°‘ãªã„ã§ã™ãŒã€ã“ã‚Œã¯ã‹ãªã‚Šè¦‹ã‚„ã™ã„ã§ã™ã€‚ スライドも概念図ãŒé »ç¹ã«ç™»å ´ã—ãŸã‚Šã—ã¦ã€ã“ã‚Œã ã‘ã§ã‚‚èžãå–ã‚Œãªã‹ã£ãŸéƒ¨åˆ†ãªã©ã‚’ã‹ãªã‚Šè£œå®Œã§ãã¾ã™ã€‚ スケジュールページ
Seven Databases in Seven Weeks Seminar - Fall 2014 - Seven Databases in Seven Weeks Seminar
Seven Databases in Seven Weeks Seminar — Fall 2014 Strap yourself in kids, because we have an amazing line-up of technical talks coming to Carnegie Mellon University in Fall 2014. Seven Databases in Seven Weeks is a semester-long seminar series with the leading developers of NoSQL and NewSQL database management systems. Each speaker will present the implementation details of their respective syste
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