Apache Sparkã«æãåºãã¦ã¤ã±ãããªãããã®åºæ¬ ï½ãApache Sparkå ¥éãããï½ ï¼ãããµã 2016 è¬æ¼è³æï¼
Apache Sparkã«æãåºãã¦ã¤ã±ãããªãããã®åºæ¬ ï½ãApache Sparkå ¥éãããï½ ï¼ãããµã 2016 è¬æ¼è³æï¼
Redash helps you make sense of your dataConnect and query your data sources, build dashboards to visualize data and share them with your company. âRedash is as essential as email to my company. We love data but accessing the data is a pain without Redash. Any company I go to, I get them hooked on Redash. Itâs an easy sell :)â by Ben Dehghan, Co-Founder of Data Miner Read what our users say â Write
ãã¬ããããã° æ ªå¼ä¼ç¤¾ãã¬ããã®ããã° | Web Planning, Design and Development è¤æ°ã®Railsã¢ããªã§åãDBã«æ¥ç¶ããå ´åDBã®ãã¤ã°ã¬ã¼ã·ã§ã³å±¥æ´ãåãschema_migrationsãã¼ãã«ã«æ ¼ç´ãããã®ã¯ã¡ãã£ã¨ãããã ã§ãschema_migrationsã£ã¦ååã¯Railsãæ±ºãã¦ãããã®ã ããã©ããã£ã¦å¤æ´ããã®ï¼ã¨ããã®ã調ã¹ããæ¥é è¾ã使ãã°ããã¿ããã§ # config/application.rb module SampleApp class Application < Rails::Application ... config.active_record.table_name_prefix = 'sample_' end end ä¸è¨ã®ããã«ãã£ã¦ããã¨ã¢ããªå ¨ä½ã®ãã¼ãã«åã«sample_ãä»ãããã«ãªã£ã¦ãåé¡ã®ç®æ
Overview Kyoto Tycoon is a lightweight database server with auto expiration mechanism, which is useful to handle cache data and persistent data of various applications. Kyoto Tycoon is also a package of network interface to the DBM called Kyoto Cabinet. Though the DBM has high performance and high concurrency, you might bother in case that multiple processes share the same database, or remote proc
2012å¹´7æ1æ¥ã®ãããç§ã®ãã¨ã«ãMySQLãJavaãªã©ã®CPU使ç¨çãé«é¨°ããäºè±¡ãå ±åããã¦ãã¾ãã CPU %user %nice %system %iowait %steal %idle 08æ30å01ç§ all 0.02 0.00 0.02 0.04 0.00 99.91 08æ40å01ç§ all 0.02 0.00 0.02 0.08 0.00 99.88 08æ50å01ç§ all 0.02 0.00 0.02 0.03 0.00 99.92 09æ00å01ç§ all 0.11 0.00 0.13 0.04 0.00 99.72 09æ10å01ç§ all 23.02 0.00 29.09 0.11 0.00 47.78 09æ20å01ç§ all 23.11 0.00 29.08 0.06 0.00 47.75 09æ30å01ç§ all 22.85 0.00
NoSQLãã¼ã¿ã¢ããªã³ã°ææ³.markdown #NoSQLãã¼ã¿ã¢ããªã³ã°ææ³ åæï¼NoSQL Data Modeling Techniques « Highly Scalable Blog I translated this article for study. contact matope[dot]ono[gmail] if any problem. NoSQLãã¼ã¿ãã¼ã¹ã¯ã¹ã±ã¼ã©ããªãã£ãããã©ã¼ãã³ã¹ãä¸è²«æ§ã¨ãã£ãæ§ã ãªéæ©è½è¦ä»¶ããæ¯è¼ããããNoSQLã®ãã®å´é¢ã¯å®è·µã¨çè«ã®ä¸¡é¢ããããç ç©¶ããã¦ããããã種ã®éæ©è½ç¹æ§ã¯NoSQLãå©ç¨ãã主ãªåæ©ã§ãããNoSQLã·ã¹ãã ã«ããé©ç¨ãããCAPå®çãããã§ããããã«åæ£ã·ã¹ãã ã®åºæ¬çååã ããã ã䏿¹ã§ãNoSQLãã¼ã¿ã¢ããªã³ã°ã¯ãã¾ãç ç©¶ããã¦ãããããªã¬ã¼ã·ã§ãã«ãã¼ã¿ãã¼ã¹ã«è¦ããããããªã·ã¹ãããã£ãã¯
ä»ã®UNIXãã·ã³ã«ãã¼ã¿ãã¼ã¹ãç§»ãããã¨ãã ãã¼ã¿ãã¼ã¹ã«å«ã¾ãã¦ããè¤æ°ã®ãã¼ãã«ãããã¦ãã¼ã¿ãã¾ã¨ãã¦ã´ã½ãã¨ç§»ããã â ãã¼ã¿ãã¼ã¹xxxdbã®ã¨ã¯ã¹ãã¼ã $ mysqldump xxxdb > xxxdb.sql -u tanaka -p xxxdbãã¼ã¿ãã¼ã¹å ã®ãã¼ãã«å ¨ã¦ãã¨ã¯ã¹ãã¼ãããã ä¸èº«ã¯ãviçã§è¦ãã°SQLæãå ¥ã£ã¦ãããã¨ãåããã â ãã¼ã¿ãã¼ã¹xxxdbã®ã¤ã³ãã¼ã $ mysql xxxdb < xxxdb.sql -u tanaka -pæ¸ãåºããSQLæãå®è¡ãã¦ãããããã®ä½æ¥ã«ãªãã ã¤ã¾ãããåããã¼ãã«åããåå¨ãã¦ããã¨ã¨ã©ã¼ã«ãªãã®ã§DROPãã¦ããã ãã¼ã¿ãã¼ã¹åã¯ãä»ã¾ã§ã¨åãååã§ãè¯ãããæ°ãããã¼ã¿ãã¼ã¹åã§ãããã mysqlimportã¯ã使ããªãã¦ããã
HowFriendFeedUsesMySqlToStoreSchemaLessData - FriendFeed ã§ã¯ MySQL ã使ãã©ã®ããã«ã¹ãã¼ãã¬ã¹ã®ãã¼ã¿ãä¿åãã¦ããã®ã ç®æ¬¡ ãã®è¨äºã«ã¤ã㦠FriendFeed? ã§ã¯ MySQL ã使ãã©ã®ããã«ã¹ãã¼ãã¬ã¹ã®ãã¼ã¿ãä¿åãã¦ããã®ã èæ¯ æ¦è¦³ 詳細 ä¸è²«æ§ã¨ååæ§ æ§è½ FriendFeed? ã§ã¯ MySQL ã使ãã©ã®ããã«ã¹ãã¼ãã¬ã¹ã®ãã¼ã¿ãä¿åãã¦ããã®ã ãã®è¨äºã«ã¤ã㦠"How FriendFeed? uses MySQL to store schema-less data" ã®æ¥æ¬èªè¨³ã§ã http://bret.appspot.com/entry/how-friendfeed-uses-mysql CC 2.5 ã§ã©ã¤ã»ã³ã¹ããã¦ãã¾ã: http://creativecommons.org/
ã¯ã¦ãªã°ã«ã¼ãã®çµäºæ¥ã2020å¹´1æ31æ¥(é)ã«æ±ºå®ãã¾ãã 以ä¸ã®ã¨ã³ããªã®éããä»å¹´æ«ãç®å¦ã«ã¯ã¦ãªã°ã«ã¼ããçµäºäºå®ã§ããæ¨ããç¥ãããã¦ããã¾ããã 2019å¹´æ«ãç®å¦ã«ãã¯ã¦ãªã°ã«ã¼ãã®æä¾ãçµäºããäºå®ã§ã - ã¯ã¦ãªã°ã«ã¼ãæ¥è¨ ãã®ãã³ãæ£å¼ã«çµäºæ¥ã決å®ãããã¾ããã®ã§ã以ä¸ã®éãã確èªãã ããã çµäºæ¥: 2020å¹´1æ31æ¥(é) ã¨ã¯ã¹ãã¼ã叿ç³è«æé:2020å¹´1æ31æ¥(é) çµäºæ¥ä»¥éã¯ãã¯ã¦ãªã°ã«ã¼ãã®é²è¦§ããã³æç¨¿ã¯è¡ãã¾ãããæ¥è¨ã®ã¨ã¯ã¹ãã¼ããå¿ è¦ãªæ¹ã¯ä»¥ä¸ã®è¨äºã«ãããã£ã¦æç¶ãããã¦ãã ããã ã¯ã¦ãªã°ã«ã¼ãã«æç¨¿ãããæ¥è¨ãã¼ã¿ã®ã¨ã¯ã¹ãã¼ãã«ã¤ã㦠- ã¯ã¦ãªã°ã«ã¼ãæ¥è¨ ãå©ç¨ã®ã¿ãªãã¾ã«ã¯ãè¿·æãããããããã¾ãããã©ãããããããé¡ããããã¾ãã 2020-06-25 è¿½è¨ ã¯ã¦ãªã°ã«ã¼ãæ¥è¨ã®ã¨ã¯ã¹ãã¼ããã¼ã¿ã¯2020å¹´2æ28
ãã£ãªã³ã³éå¤ã«ããæ»ã®ãããªæ±ã§ãæããTã·ã£ããã·ã¼ã¹ã«ã¼ã«ãªã£ã¦ãã¾ãmikioã§ãããã¦ä»åã¯ãTokyo Cabinetï¼TCï¼ã®ãã¼ã¿ãã¼ã¹ãå種ã®ã¢ã«ã´ãªãºã ã§å§ç¸®ãã¦å©ç¨ããæ¹æ³ã«ã¤ãã¦ãç´¹ä»ãã¾ãã å§ç¸®B+æ¨ B+æ¨ã¨ã¯ãæ¯è¼é¢æ°ã®å¤ã«ããé åºãè¿ãã¬ã³ã¼ã群ãåä¸ã®ãã¼ã¸ã«ã¾ã¨ããåãã¼ã¸ã«Bæ¨ï¼multiway balanced treeã®ç¥ã§ãããäºåæ¨ï¼binary treeï¼ã¨ã¯éãã¾ãï¼ã®ç´¢å¼ãå¼µã£ããã®ã§ããçè«çã«ã¯ã¬ã³ã¼ãã®æ¢ç´¢ãæ´æ°ã O(log n) ã®æéè¨ç®éã§è¡ããå é¨ãã¼ãï¼Bæ¨ï¼ã®æä½ããã£ãã·ã¥ããã¨å®è³ªçã«ã¯ O(1) ã®æéè¨ç®éã§æ¢ç´¢ãæ´æ°ãè¡ããã¨ãããããªãå®å®ããæ§è½ãåãããã¼ã¿æ§é ã§ãããã®ä¸ãã¬ã³ã¼ããä¸å®ã®é åºã«åºã¥ãã¦ä¸¦ã¹ããã¦ããã®ã§ãæ°å¤ã®ç¯å²æ¤ç´¢ãæååã®åæ¹ä¸è´æ¤ç´¢ãé«éã«è¡ããããã«ã¼ã½ã«ã«ãã£ã¦é åºã«åº
ã¡ã³ããã³ã¹
ã©ã³ãã³ã°
ãç¥ãã
ãªãªã¼ã¹ãé害æ å ±ãªã©ã®ãµã¼ãã¹ã®ãç¥ãã
ææ°ã®äººæ°ã¨ã³ããªã¼ã®é ä¿¡
å¦çãå®è¡ä¸ã§ã
j次ã®ããã¯ãã¼ã¯
kåã®ããã¯ãã¼ã¯
lãã¨ã§èªã
eã³ã¡ã³ãä¸è¦§ãéã
oãã¼ã¸ãéã
{{#tags}}- {{label}}
{{/tags}}