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yohei id:yohei

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ãƒ‡ãƒ¼ã‚¿ãƒ™ãƒ¼ã‚¹ã‚³ãƒ³ã‚µãƒ«ã‚¿ãƒ³ãƒˆã®ãƒŽã‚¦ãƒã‚¦ã¡ã‚‡ã„è¦‹ã› ACIDã‚’è¶…ãˆã‚‹æ¦‚å¿µã‹ï¼Ÿã€€æ–°ã—ã„ãƒˆãƒ©ãƒ³ã‚¶ã‚¯ã‚·ãƒ§ãƒ³ã®è€ƒãˆæ–¹ - BASE
å„ç¨®ã‚¤ãƒ³ãƒ•ãƒ©æŠ€è¡“(OSã€ã‚¹ãƒˆãƒ¬ãƒ¼ã‚¸ã€ãƒãƒƒãƒˆãƒ¯ãƒ¼ã‚¯)ã‚„ã‚ªãƒ©ã‚¯ãƒ«è£½å“ã¨ã„ã£ãŸè©±é¡Œã‚’å–ã‚Šä¸Šã’ã¾ã™ã€‚è‘—è€…ã¯å°ç”°åœäºŒã€ã€Œé–€å¤–ä¸å‡ºã®Oracleç¾å ´ãƒ¯ã‚¶ã€ã€ã€Œçµµã§è¦‹ã¦ã‚ã‹ã‚‹Oracleã®ä»•çµ„ã¿ã€ã€ã€Œçµµã§è¦‹ã¦ã‚ã‹ã‚‹OS/ã‚¹ãƒˆãƒ¬ãƒ¼ã‚¸/ãƒãƒƒãƒˆãƒ¯ãƒ¼ã‚¯ã€ãªã©ã®è‘—ä½œã‚‚ã‚ã‚Šã¾ã™ DBä½¿ã„ã§ã‚ã‚Œã°ã€ACID(Atomicityã€Consistencyã€Isolationã€Durability)ã¯å½“ãŸã‚Šå‰ã®è€ƒãˆã‹ã¨æ€ã„ã¾ã™ã€‚å®Ÿã¯ã€DBMSãªã‚‰ACIDãŒå½“ãŸã‚Šå‰ã¨ã„ã†ã®ã¯ã€æ€ã„ã“ã¿ã¨è¨€ã£ã¦ã‚‚è‰¯ã„ã®ã§ã™ã€‚å°‘ãªãã¨ã‚‚ã€ACIDä»¥å¤–ã®è€ƒãˆæ–¹ãŒå˜åœ¨ã™ã‚‹ã®ã¯äº‹å®Ÿã§ã™ã€‚ ä»Šå›žã¯ã€ãã‚“ãªè€ƒãˆæ–¹ã§ã‚ã‚‹ã€BASE(Basically Availableã€Soft stateã€Eventually consistent)ã‚’ç´¹ä»‹ã—ã¾ã™ã€‚ã‚¯ãƒ©ã‚¦ãƒ‰ãªã©ã®ä¸–ç•Œã§å¾ã€…ã«åºƒãŒã‚Šã¤ã¤ã‚ã‚‹ã€ãƒˆãƒ©ãƒ³ã‚¶ã‚¯ã‚·ãƒ§ãƒ³ã®è€ƒãˆæ–¹ã§ã™ã€‚ ã“ã®è¨˜äº‹ã¯ã€ã€ŒBASE: An A
yohei 2009/05/27
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Drop ACID and Think AboutÂ Data - High Scalability -
The abstract for the talk given by Bob Ippolito, co-founder and CTO of Mochi Media, Inc: Building large systems on top of a traditional single-master RDBMS data storage layer is no longer good enough. This talk explores the landscape of new techno logies available today to augment your data layer to improve performance and reliability. Is your application a good fit for caches, bloom filters, bitma
yohei 2009/05/06
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base

eventuallyconsistent

couchdb
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ã‚¨ã‚¤ãƒ—ãƒªãƒ«ãƒ•ãƒ¼ãƒ«ãƒã‚¿ï¼šã‚¹ã‚±ãƒ¼ãƒ«ã‚¢ã‚¦ãƒˆã™ã‚‹MySQLäº’æ›RDBMS - Scale41ãƒªãƒªãƒ¼ã‚¹ï¼ - Blog by Sadayuki Furuhashi
2009å¹´4æœˆ1æ—¥ã¯è¨˜å¿µã™ã¹ãæ—¥ã«ãªã£ãŸã¨ç¢ºä¿¡ã—ã¦ã„ã¾ã™ã€‚ å†…éƒ¨ã«çŠ¶æ…‹ã‚’æŒãŸãªã„ã‚¢ãƒ—ãƒªã‚±ãƒ¼ã‚·ãƒ§ãƒ³ã‚µãƒ¼ãƒãƒ¼ã¯ã€ã‚µãƒ¼ãƒãƒ¼ã‚’è¶³ã™ã ã‘ã§æ¯”è¼ƒçš„ç°¡å˜ã«ã‚¹ã‚±ãƒ¼ãƒ«ã‚¢ã‚¦ãƒˆã™ã‚‹ã“ã¨ãŒã§ãã¾ã™ã€‚ä¸€æ–¹ã§ACIDç‰¹æ€§ãŒæ±‚ã‚ã‚‰ã‚Œã‚‹ç”¨é€”ã«ç”¨ã„ã‚‹RDBMSã¯ã€å˜ã«ã‚µãƒ¼ãƒãƒ¼ã‚’è¶³ã™ã ã‘ã§ã‚¹ã‚±ãƒ¼ãƒ«ã‚¢ã‚¦ãƒˆã™ã‚‹ã®ã¯éžå¸¸ã«å›°é›£ã§ã™ã€‚ ã‚·ã‚¹ãƒ†ãƒ ãŒå¤§è¦æ¨¡ã«ãªã‚‹ã»ã©å¾ã€…ã«RDBMSã®æ€§èƒ½ãŒè¶³ã‚’å¼•ã£å¼µã‚‹ã‚ˆã†ã«ãªã£ã¦ã—ã¾ã†ãŸã‚ã€é«˜ä¾¡ãªãƒãƒ¼ãƒ‰ã‚¦ã‚§ã‚¢ã«é ¼ã£ã¦ã‚¹ã‚±ãƒ¼ãƒ«ã‚¢ãƒƒãƒ—ã›ã–ã‚‹ã‚’å¾—ãªã„ã‚±ãƒ¼ã‚¹ã‚‚å¤šã„ã§ã—ã‚‡ã†ã€‚ ãƒ‡ãƒ¼ã‚¿ãƒ™ãƒ¼ã‚¹ã‚’æ°´å¹³ã«åˆ†å‰²ã—ã¦åˆ†æ•£ã•ã›ã‚‹æ–¹æ³•ã§ã¯ã€JOINå‘½ä»¤ãŒä½¿ãˆãªããªã‚‹ãªã©ã®åˆ¶ç´„ãŒç™ºç”Ÿã™ã‚‹ãŸã‚ã€ã‚ã‚‰ã‹ã˜ã‚ãƒ‡ãƒ¼ã‚¿ãƒ™ãƒ¼ã‚¹ã‚’åˆ†æ•£ã•ã›ã‚‹ã“ã¨ã‚’å¿µé ã«å…¥ã‚Œã¦ã‚¢ãƒ—ãƒªã‚±ãƒ¼ã‚·ãƒ§ãƒ³ã‚’è¨è¨ˆã—ã¦ãŠãå¿…è¦ãŒã‚ã‚Šã¾ã™ã€‚æ—¢å˜ã®ã‚¢ãƒ—ãƒªã‚±ãƒ¼ã‚·ãƒ§ãƒ³ã¨ã®äº’æ›æ€§ã‚’ç¶æŒã—ãŸã¾ã¾ãƒ‡ãƒ¼ã‚¿ãƒ™ãƒ¼ã‚¹ã‚’æ°´å¹³åˆ†å‰²ã™ã‚‹ã®ã¯å›°é›£ã ã¨è¨€ãˆã¾ã™ã€‚ ãã“ã§ã€ã‚µãƒ¼ãƒãƒ¼ã‚’è¶³ã™ã“ã¨ã§æ›¸ãè¾¼ã¿ãƒ»èªã¿è¾¼ã¿å…±
yohei 2009/04/01
databases

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base

neta
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ä»Šé€±18æ—¥ã‹ã‚‰ãƒžã‚¤ã‚¯ãƒã‚½ãƒ•ãƒˆãŒãƒ©ã‚¹ãƒ™ã‚¬ã‚¹ã§ã€ŒMIX09ã€ã‚’é–‹å‚¬ã—ã¾ã™ã€‚Windows 7ã‚„Windows AzureãŒç™ºè¡¨ã•ã‚ŒãŸæ˜¨å¹´ç§‹ã®PDCï¼ˆProfessional Developers Conferenceï¼‰ã¨ã¯ç•°ãªã‚Šã€MIXã¯Webãƒ‡ã‚¶ã‚¤ãƒŠãƒ¼ã¨Webãƒ‡ãƒ™ãƒãƒƒãƒ‘ãƒ¼å‘ã‘ã®ã‚¤ãƒ™ãƒ³ãƒˆã§ã™ã€‚ ã¨ã“ã‚ã§ã€ãƒ‡ã‚¶ã‚¤ãƒŠãƒ¼ã¨ãƒ‡ãƒ™ãƒãƒƒãƒ‘ãƒ¼å‘ã‘ã®ã‚¤ãƒ™ãƒ³ãƒˆã¨ã„ãˆã°ã‚¢ãƒ‰ãƒ“ã‚·ã‚¹ãƒ†ãƒ ã‚ºã®ã‚¤ãƒ™ãƒ³ãƒˆãŒæœ‰åã€‚ãã®åç§°ã¯ãŸã—ã‹ã€ŒMAXã€ã§ã™ã‚ˆã......ã€‚ ã•ã¦ã€‚MIX09ã§ã¯Windows Azureã®æ–™é‡‘ä½“ç³»ã®ç™ºè¡¨ãŒã‚ã‚‹ã‹ã‚‚ã—ã‚Œãªã„ã¨ã„ã‚ã‚Œã¦ã„ã¾ã™ã€‚ã‚‚ã—ç™ºè¡¨ã•ã‚Œã‚Œã°ã€ITç³»ãƒ¡ãƒ‡ã‚£ã‚¢ã®ãƒ˜ãƒƒãƒ‰ãƒ©ã‚¤ãƒ³ã‚’é£¾ã‚‹ã“ã¨ã§ã—ã‚‡ã†ã€‚ åƒ•ãŒæ³¨ç›®ã—ã¦ã„ã‚‹ã®ã¯ã€å…ˆæ—¥ã€Œãƒžã‚¤ã‚¯ãƒã‚½ãƒ•ãƒˆãŒã‚¯ãƒ©ã‚¦ãƒ‰ã§ãƒªãƒ¼ãƒ€ãƒ¼ã‚·ãƒƒãƒ—ã‚’æ¡ã‚‹å¯èƒ½æ€§ãŒé«˜ã¾ã‚‹ã€ã§æ›¸ã„ãŸã€SQL Serverå®Œå…¨äº’æ›ã®ã€ŒSQL Data Servicesã€ï¼ˆSDSï¼‰ã«ã¤ã„ã¦ã®å…·ä½“çš„ãªå†…å®¹ã®
yohei 2009/03/18
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Microsoft PowerPoint - PODC-keynote
1 PODC Keynote, July 19, 2000 PODC Keynote, July 19, 2000 Towards Robust Towards Robust Distributed Systems Distributed Systems Dr. Eric A. Brewer Dr. Eric A. Brewer Professor, UC Berkeley Professor, UC Berkeley Co Co- -Founder & Chief Scientist, Inktomi Founder & Chief Scientist, Inktomi PODC Keynote, July 19, 2000 PODC Keynote, July 19, 2000 Inktomi at a Glance Inktomi at a Glance Company Overvi
yohei 2009/02/28
Brewer ã®PODCã®ã‚ãƒ¼ãƒŽãƒ¼ãƒˆ(2000å¹´)ã€‚Breweräºˆæƒ³ã®è¨˜å¿µã™ã¹ãèª•ç”Ÿã®çž¬é–“

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Brewerâ€™s CAP Theorem
We know three chords but you can only pick two On Friday 4th June 1976, in a small upstairs room away from the main concert auditorium, the Sex Pistols kicked off their first gig at Manchesterâ€™s Lesser Free Trade Hall. Thereâ€™s some confusion as to who exactly was there in the audience that night, partly because there was another concert just six weeks later, but mostly because itâ€™s considered to b
yohei 2009/02/27
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history
ãƒªãƒ³ã‚¯
2009-02-10
ACIDã®ä»£æ›¿æ‰‹æ®µã¨ã—ã¦BASEã¨ã„ã†æ‰‹æ³•ã‚’æå”±ã—ã¦ã„ã‚‹äººãŒã„ã‚‹ã“ã¨ã‚’ id:nowokayã•ã‚“ã®blogã§çŸ¥ã£ãŸã€‚ http://d.hatena.ne.jp/nowokay/20090209#1234150066 ãªã‚“ã‹æ°—ã«ãªã£ãŸã®ã§è»½ãèª¿ã¹ã¦ãŸã‚‰ã€JTAå®Ÿè£…ã§ã‚ã‚‹ã€Atomikosä½œã£ã¦ã‚‹äººãŒ ã²ã£ã‹ã‹ã‚‹ã€‚CAPã«é–¢ã—ã¦ä¸€è¨€ã‚ã‚‹ã‚¨ãƒ³ãƒˆãƒªãŒã‚ã£ãŸã€‚ http://guysblogspot.blogspot.com/ Atomikosã¯XTPã‚‚ç°¡å˜ã ï¼ã¨ã‹è¨€ã£ã¦ã‚‹ã‘ã©ã€ãªã‚“ã‹ãã‚Œã§ã„ã„ã®ã‹ã¨æ€ã†ãã‚‰ã„ å˜ç´”ãªã‚½ãƒªãƒ¥ãƒ¼ã‚·ãƒ§ãƒ³ã«ãªã£ã¦ã‚‹ãŒã€‚ http://guysblogspot.blogspot.com/2008/11/atomikos-for-xtp-transactions-for.html BASEãŒãã¡ã‚“ã¨ã‚ã‹ã£ã¦ãªã„ã®ã§ãã¡ã‚“ã¨èªã‚€å¿…è¦ãŒã‚ã‚‹ã€‚ ä¸èº«ã‚’ãŠã•ãˆã‚‹å¿…è¦ãŒã‚ã‚Šãã†ãªã‚‰ã€
yohei 2009/02/27
base
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L'eclat des jours(2008-11-20)
_ ACIDã‹ã‚‰BASE ã¡ã‚‡ã£ã¨å‹‰å¼·ã€‚ BASEï¼šACIDã®ä»£ã‚ã‚Šã‚’ã©ã†ãž è¦ç´„(ã®ã¤ã‚‚ã‚Šã ã£ãŸãŒã®ã‚Šã§)æŠ„è¨³ï¼šï¼ˆèª¤èªã¯ååˆ†ã‚ã‚Šå¾—ã‚‹ï¼‰ ã“ã‚Œã¾ã§ã¯åž‚ç›´æ‹¡æ•£ï¼ˆã†ã¾ã„è¨³ã¯ãªã‚“ã ã‚ã†ï¼Ÿ vertical scalingï¼‰ã£ã¦ã®ãŒã²ã¨ã¤ã®æ–¹æ³•ã ã£ãŸã€‚ã‚ˆã‚Šãƒ‘ãƒ¯ãƒ•ãƒ«ãªãƒžã‚·ãƒ³ã¸ç§»è¡Œã™ã‚‹ã¨ã„ã†é“ç‹ã ã€‚ä½•ã‚ˆã‚Šç°¡å˜ã ã£ã¦ã®ãŒã„ã„ã¨ã“ã‚ã€‚ã§ã‚‚ã€å•é¡ŒãŒã‚ã‚‹ã€‚ã©ã“ã¾ã§ã§ã‚‚ã§ã‹ãã§ãã‚‹ã‚ã‘ã§ã‚‚ãªã„ã—ã€ä½•ã‚ˆã‚Šé‡‘é£Ÿã„è™«ã ã€‚ ãã‚Œã«å¯¾ã—ã¦æ°´å¹³æ‹¡æ•£ï¼ˆhorizontal scalingï¼‰ã£ã¦ã®ã‚‚ã‚ã‚‹ã€‚ã„ã‚„ã€ã§ã‚‚ã“ã‚Œã¯è¤‡é›‘ã«ãªã‚‹ã€‚ã“ã®å ´åˆã¯ã€2æ¬¡å…ƒã§è€ƒãˆã‚‹ã¨ã„ã„ãã€‚æ¨ªæ–¹å‘ã¯æ©Ÿèƒ½åˆ†å‰²ã€‚ç¸¦æ–¹å‘ã¯æ–ç‰‡åŒ–ã ã€‚Oracleã®ãƒ‘ãƒ¼ãƒ†ã‚£ã‚·ãƒ§ãƒ‹ãƒ³ã‚°ã‚ãŸã‚Šã¨ã‹ã‹ãªã€‚ æ©Ÿèƒ½åˆ†å‰²ã¯ã„ã„ã‚“ã ã‘ã©ã€ãã†ãªã‚‹ã¨1ã¤ã®ãƒˆãƒ©ãƒ³ã‚¶ã‚¯ã‚·ãƒ§ãƒ³ãŒè¤‡æ•°ã®ãƒ‡ãƒ¼ã‚¿ãƒ™ãƒ¼ã‚¹ã‚µãƒ¼ãƒãƒ¼ã‚’ã¾ãŸãŒã‚‹å¿…è¦ãŒå‡ºã¦ãã‚‹ã€‚ ã‚¨ãƒªãƒƒã‚¯?ãƒ–ãƒ«ãƒ¼ãƒ¯ã£ã¦ã„ã†ãƒãƒ¼ã‚¯ãƒ¬ãƒ¼ã®å…ˆç”Ÿã§ã€ã‚¤ãƒ³ã‚¯ãƒˆãƒŸã®é¦–å¸ã‚µã‚¤
yohei 2009/02/27
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EventuallyConsistent - çµæžœæ•´åˆæ€§
EventuallyConsistent - çµæžœæ•´åˆæ€§ ç›®æ¬¡ ã“ã®æ–‡æ›¸ã«ã¤ã„ã¦ çµæžœæ•´åˆæ€§ æ´å²ã®è©± ã‚¯ãƒ©ã‚¤ã‚¢ãƒ³ãƒˆå´ã®æ•´åˆæ€§ ã‚µãƒ¼ãƒå´ã®æ•´åˆæ€§ ã¾ã¨ã‚ çµæžœæ•´åˆæ€§ ã“ã®æ–‡æ›¸ã«ã¤ã„ã¦ Werner Vogels "Eventually Consistent" ã®æ—¥æœ¬èªžè¨³ã§ã™. http://www.allthingsdistributed.com/2007/12/eventually_consistent.html æŽ¨æ•²æ“è¿Ž: èª¤è¨³, ã‚¿ã‚¤ãƒ, è¨³èªžã®ä¸çµ±ä¸€, ãã®ã»ã‹... è¿‘å¹´, ãƒ‡ãƒ¼ã‚¿è¤‡è£½ã®æ–‡è„ˆã§ çµæžœæ•´åˆæ€§(eventual consistency) ã«é–¢ã™ã‚‹è°è«–ãŒç››ã‚“ã . ã“ã®è¨˜äº‹ã§ã¯å¤§è¦æ¨¡ãƒ‡ãƒ¼ã‚¿ã®è¤‡è£½ã«ãŠã‘ã‚‹åŽŸå‰‡ã‚„æŠ½è±¡, é«˜å¯ç”¨æ€§ã¨ãƒ‡ãƒ¼ã‚¿æ•´åˆæ€§ã®ãƒˆãƒ¬ãƒ¼ãƒ‰ã‚ªãƒ•ã«é–¢ã™ã‚‹è©±é¡Œã‚’ã„ãã¤ã‹é›†ã‚ã¦ã¿ãŸã„ã¨æ€ã†. ç¾åœ¨é€²è¡Œä¸ã®åˆ†é‡Žã§ã‚ã‚Š, å…¨ã¦ã®å®šç¾©ãŒæœ€åˆã‹ã‚‰æ˜Žå¿«ã§ã‚ã‚‹ã¨ã¯æ€ã‚ãªã„ã§ã»
yohei 2009/02/26
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Eventually Consistent
Eventually ConsistentDecember 19, 2007 â€¢ 2491 words I wrote a first version of this posting on consistency models in December 2007, but I was never happy with it as it was written in haste and the topic is important enough to receive a more thorough treatment. ACM Queue asked me to revise it for use in their magazine and I took the opportunity to improve the article. I posted an update to this art
yohei 2009/02/26
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Lessons from Internet Services: ACID vs. BASE Dr. Eric A. Brewer UC Berkeley Inktomi Corporation
Dr. Eric A. Brewer UC Berkeley Inktomi Corporation 11/15/98 Click here to start
yohei 2009/02/26
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bliki: Transactionless
A couple of years ago I was talking to a couple of friends of mine who were doing some work at eBay. It's always interesting to hear about the techniques people use on high volume sites, but perhaps one of the most interesting tidb its was that eBay mostly hardly ever uses database transactions. For most people, coming into a transactionless environment is quite a shock. Using transactions is a ver
yohei 2009/02/26
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architecture

databases
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ã‚ãªãŸã«ã¨ã£ã¦é‡è¦ãªãƒˆãƒ”ãƒƒã‚¯ã‚„åŒåƒšã®æœ€æ–°æƒ…å ±ã‚’å…¥æ‰‹ã—ã¾ã—ã‚‡ã†æœ€æ–°ã®æ´žå¯Ÿã¨ãƒˆãƒ¬ãƒ³ãƒ‰ã«é–¢ã™ã‚‹æœ€æ–°æƒ…å ±ã‚’å³åº§ã«å—ã‘å–ã‚Šã¾ã—ã‚‡ã†ã€‚ ç¶™ç¶šçš„ãªå¦ç¿’ã®ãŸã‚ã«ã€ç„¡æ–™ã®ãƒªã‚½ãƒ¼ã‚¹ã«æ‰‹è»½ã«ã‚¢ã‚¯ã‚»ã‚¹ã—ã¾ã—ã‚‡ã†ãƒŸãƒ‹ãƒ–ãƒƒã‚¯ã€ãƒˆãƒ©ãƒ³ã‚¹ã‚¯ãƒªãƒ—ãƒˆä»˜ãå‹•ç”»ã€ãŠã‚ˆã³ãƒˆãƒ¬ãƒ¼ãƒ‹ãƒ³ã‚°æ•™æã€‚ è¨˜äº‹ã‚’ä¿å˜ã—ã¦ã€ã„ã¤ã§ã‚‚èªã‚€ã“ã¨ãŒã§ãã¾ã™è¨˜äº‹ã‚’ãƒ–ãƒƒã‚¯ãƒžãƒ¼ã‚¯ã—ã¦ã€æº–å‚™ãŒã§ããŸã‚‰ã„ã¤ã§ã‚‚èªã‚ã¾ã™ã€‚
yohei 2009/02/26
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