SQLトランザクション分離 実践ガイド | POSTD
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Aether - Qiita
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トランザクション分離レベルã®å¤å…¸çš„è«–æ–‡ A Critique of ANSI SQL Isolation Levels ã‚’èªã‚€ - Hatena Developer Blog
ã“ã‚“ã«ã¡ã¯ã€ id:alpicola ã§ã™ã€‚今年4月ã«æ–°å’入社ã—ã¦ã‚¢ãƒ—リケーションエンジニアã¨ã—ã¦åƒã„ã¦ã„ã¾ã™ã€‚ ウェブアプリケーションã¯ãã®æ€§è³ªä¸Šã€ãƒ‡ãƒ¼ã‚¿ãƒ™ãƒ¼ã‚¹ã«å¯¾ã—ã¦åŒæ™‚ã«å¤§é‡ã®å•ã„åˆã‚ã›ã‚’è¡Œã„ã¾ã™ã€‚ãã†ã—ãŸä¸ã§ãƒ‡ãƒ¼ã‚¿ãƒ™ãƒ¼ã‚¹ãŒå€‹ã€…ã®å•ã„åˆã‚ã›ã‚’処ç†ã—ã¦ã„ãã¨ãã«èµ·ã“ã£ã¦ã„ã‚‹ã“ã¨ã¯ä½•ã‹ã€ã©ã†ã„ã†é †åºã§å‡¦ç†ãŒè¡Œã‚れるã®ã‹ã€ã¨ã„ã†ã®ã¯èˆˆå‘³æ·±ã„話題ã‹ã¨æ€ã„ã¾ã™ã€‚例ãˆã°ãƒ‡ãƒ¼ã‚¿ãƒ™ãƒ¼ã‚¹ã«å¯¾ã—ã¦è¡Œã£ãŸæ›´æ–°å‡¦ç†ã®çµæžœãŒã€æ›´æ–°ã‚’è¡Œã£ãŸã‚¯ãƒ©ã‚¤ã‚¢ãƒ³ãƒˆä»¥å¤–ã®ã‚¯ãƒ©ã‚¤ã‚¢ãƒ³ãƒˆã‹ã‚‰ã‚‚「見ãˆã‚‹ã€ã‚ˆã†ã«ãªã‚‹ã®ã¯ã„ã¤ã§ã—ょã†ã‹ã€‚入社間もãªã„é ƒã€å…ˆè¼©ã‚¨ãƒ³ã‚¸ãƒ‹ã‚¢é”ã«ãã†ã—ãŸç–‘å•ã‚’ã¶ã¤ã‘ã¦ã¿ãŸã¨ã“ã‚ã€ã€Œãƒˆãƒ©ãƒ³ã‚¶ã‚¯ã‚·ãƒ§ãƒ³åˆ†é›¢ãƒ¬ãƒ™ãƒ«ã€ã¨ã„ã†ã‚ーワードã¨ã€ã“ã®åˆ†é‡Žã®å¤å…¸çš„ãªè«–æ–‡ A Critique of ANSI SQL Isolation Levels ã‚’æ•™ãˆã¦ã‚‚らã„ã€è¼ªèªä¼šã‚’社内ã§é–‹å‚¬ã—ã¾ã—ãŸã€‚ã“ã®è¨˜äº‹ã§ã¯ã“ã®è¼ªèªä¼šã®æ¨¡æ§˜ã‚’レãƒãƒ¼
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κeenã§ã™ã€‚最近KeenS/transaction-rs: The transaction abstraction library and its executors for rustã¨ã„ã†ãƒ©ã‚¤ãƒ–ラリをリリースã—ãŸã®ã§ãã‚Œã«ã¤ã„ã¦ã€‚ モãƒãƒ™ãƒ¼ã‚·ãƒ§ãƒ³ Rustã§ãƒ‰ãƒ¡ã‚¤ãƒ³ãƒã‚¸ãƒƒã‚¯ã‚’書ã„ã¦ã„ã‚‹ã¨ä»¥ä¸‹ã®ã‚ˆã†ãªã‚³ãƒ¼ãƒ‰ãŒå‡ºã¦ãã¾ã—ãŸã€‚ (実際ã¯ã‚‚ã†ã¡ã‚‡ã£ã¨è¤‡é›‘ã§ã™ãŒæœ¬è³ªã§ã¯ãªã„ã®ã§ç°¡ç•¥åŒ–ã—ã¾ã™) struct GroupPgDao(r2d2::Pool<ConnectionManager<PgConnection>>); impl GroupPgDao { fn get_conn(&self) -> &PgConnection { /*... */ } fn delete_user(&self, user: &User, group: &Group) -> Result<()> { let cn =
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A Critique of ANSI SQL Isolation Levelså†èª - 急ãŒã°å›žã‚Œã€é¸ã¶ãªã‚‰è¿‘é“
元論文ã¯ã“ã¡ã‚‰ https://www.microsoft.com/en-us/research/wp-content/uploads/2016/02/tr-95-51.pdf 詳細ãªã‚¹ãƒ©ã‚¤ãƒ‰ã¯ã“ã¡ã‚‰ã«ãªã‚Šã¾ã™ã€‚今年ã®å¤ã®ã‚¯ãƒ©ã‚¦ãƒ‰æ¸©æ³‰ã§ç™ºè¡¨ã—ãŸå†…容ã§ã™ã€‚一回見直ã—ã¦ã€è‹¥å¹²æ‰‹ç›´ã—ã‚’ã—ã¦ã„ã¾ã™ã€‚ http://www.slideshare.net/okachimachi/a-critique-of-ansi-sql-isolation-levels è«–æ–‡ã®è§£èª¬ã¯å‰²ã¨æ„味ãŒã‚ã‚‹ã¨æ€ã£ãŸã®ã§ã€ã‚¹ãƒ©ã‚¤ãƒ‰è‡ªä½“ã¯å‰²ã¨ã¾ã˜ã‚ã«ä½œã‚Šã¾ã—ãŸã€‚クラウド温泉ã§ã¯å£å…«ä¸æ‰‹å…«ä¸ã§ã„ã‚ã„ã‚話ã—ã¾ã—ãŸãŒã€ãã®è¾ºã¯ã‚ªãƒŸãƒƒãƒˆã—ã¦ã„ã¾ã™ã€‚ã“ã®è«–æ–‡ã®è§£èª¬ã¯æŽ¢ã›ã°ã€ã„ã‚ã„ã‚å··ã«ã¯ã‚ã‚‹ã®ã§ã™ãŒã€ã‹ãªã‚Šè‹¦é—˜ã—ã¦çŸ¢å°½ã刀折れ状態ãŒæ•£è¦‹ã•ã‚Œã‚‹ã®ã§ã€å¤šå°‘ãªã‚Šã¨ã‚‚状æ³ãŒè£œä¿®ã§ãã‚Œã°ã¨æ€ã£ã¦ãŠã„ã¦ãŠãã¾ã™ã€‚（尚ã€å½“然ã§ã™ãŒã€å†…容ãŒæ£ç¢ºã‹ã©ã†ã‹ã¯
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ディスクé…延ã¨ã‚°ãƒ«ãƒ¼ãƒ—コミット - Qiita
Deleted articles cannot be recovered. Draft of this article would be also deleted. Are you sure you want to delete this article? 市販ã•ã‚Œã¦ã„ã‚‹ãƒãƒ¼ãƒ‰ãƒ‡ã‚£ã‚¹ã‚¯ã¯å¤§åŠãŒ7200rpmã§ã‚る。 ã“ã‚Œã¯æ¯Žåˆ†7200回転ã€ã¤ã¾ã‚Šæ¯Žç§’120回転ã™ã‚‹äº‹ã‚’æ„味ã—ã¦ãŠã‚Šã€ãƒãƒ¼ãƒ‰ãƒ‡ã‚£ã‚¹ã‚¯ã®ãƒ˜ãƒƒãƒ‰ã‚’目的ã®å ´æ‰€ã«åˆã‚ã›ã‚‹ãƒ©ãƒ³ãƒ€ãƒ アクセスã«1/120秒ã»ã©æŽ›ã‹ã‚‹è¦‹è¾¼ã¿ãŒã‚ã‚‹ã¨ã‚‚言ãˆã‚‹ã€‚実際HDDã®ã‚«ã‚¿ãƒã‚°ã‚¹ãƒšãƒƒã‚¯ã‚’見ã¦ã‚‚ヘッドシークã¯10ms程度掛ã‹ã‚‹ã¨è¦‹ã¦é–“é•ã„ãªã„。 ã–ã£ãり言ã†ã¨æ™®é€šã®ãƒãƒ¼ãƒ‰ãƒ‡ã‚£ã‚¹ã‚¯ã¯1秒ã«120箇所以上ã«æ›¸ã込む事ã¯ã§ããªã„。(探ã›ã°15000rpmã®ãƒãƒ¼ãƒ‰ãƒ‡ã‚£ã‚¹ã‚¯ã‚‚ã‚ã‚‹ã‘ã‚Œã©å€é€Ÿããªã‚‹ã‚ã‘ã§ã‚‚ãªã•ãã†ï¼‰ ãƒã‚°ã‚’書ãã¨ã„ã†äº‹ 毎秒120箇所を書ãæ›ãˆã‚Œãªã„ã®ã«1ã¤
トランザクションã®åŸºæœ¬ - Qiita
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一人トランザクション技術ã®ã‚«ãƒ¬ãƒ³ãƒ€ãƒ¼ | Advent Calendar 2016 - Qiita
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3. Copyright©2016 NTT corp. All Rights Reserved. トランザクションã®åŸºæœ¬ トランザクションã¨ã¯ï¼š データã«å¯¾ã™ã‚‹ä¸€é€£ã®æ“作を一ã¤ã«ã¾ã¨ã‚ãŸå˜ä½ã®äº‹ トランザクションマãƒãƒ¼ã‚¸ãƒ£ã¨ã¯ï¼š 複数ã®ãƒˆãƒ©ãƒ³ã‚¶ã‚¯ã‚·ãƒ§ãƒ³ãŒACIDを守ã£ã¦èµ°ã‚‹ã‚ˆ ã†ã«ç®¡ç†ã™ã‚‹æ©Ÿæ§‹ A: Atomicity çµæžœãŒAll-or-Nothingã¨ãªã‚‹äº‹ C: Consistency 一貫性を守る事 I: Isolation éŽç¨‹ãŒä»–ã®å‡¦ç†ã‹ã‚‰è¦‹ãˆãªã„事 D: Durability çµæžœãŒæ°¸ç¶šåŒ–ã•ã‚Œã‚‹äº‹ ConsistentãªçŠ¶æ…‹ç©ºé–“ InconsistentãªçŠ¶æ…‹ç©ºé–“ DiskãŒå–ã‚Šã†ã‚‹å…¨ã¦ã®çŠ¶æ…‹ã®ç©ºé–“ Atomicãªé·ç§» 4. Copyright©2016 NTT corp. All Rights Reserved. 何らã‹ã®å®Ÿè¡Œé †(スケジュール空間) 直列ã«å®Ÿè¡Œã—ãŸå ´åˆã®çµæžœ
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Automating the Detection of Snapshot Isolation Anomalies
Amazon.com: Theory of Database Concurrency Control: Papadimitriou, Christos: Books
GitHub - ept/hermitage: What are the differences between the transaction isolation levels in databases? This is a suite of test cases which differentiate isolation levels.
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